comparison armadillo-3.900.4/include/armadillo_bits/Mat_meat.hpp @ 49:1ec0e2823891

Switch to using subrepo copies of qm-dsp, nnls-chroma, vamp-plugin-sdk; update Armadillo version; assume build without external BLAS/LAPACK

+// Copyright (C) 2008-2013 NICTA (www.nicta.com.au)
+// Copyright (C) 2008-2013 Conrad Sanderson
+// Copyright (C) 2012 Ryan Curtin
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+//! \addtogroup Mat
+//! @{
+
+
+template<typename eT>
+inline
+Mat<eT>::~Mat()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  if(mem_state == 0)
+    {
+    if(n_elem > arma_config::mat_prealloc)
+      {
+      memory::release( access::rw(mem) );
+      }
+    }
+    
+  if(arma_config::debug == true)
+    {
+    // try to expose buggy user code that accesses deleted objects
+    access::rw(mem) = 0;
+    }
+  
+  arma_type_check(( is_supported_elem_type<eT>::value == false ));
+  }
+
+
+
+template<typename eT>
+inline
+Mat<eT>::Mat()
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  }
+
+
+
+//! construct the matrix to have user specified dimensions
+template<typename eT>
+inline
+Mat<eT>::Mat(const uword in_n_rows, const uword in_n_cols)
+  : n_rows(in_n_rows)
+  , n_cols(in_n_cols)
+  , n_elem(in_n_rows*in_n_cols)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init_cold();
+  }
+
+
+
+//! constructor used by Row and Col classes
+template<typename eT>
+inline
+Mat<eT>::Mat(const arma_vec_indicator&, const uhword in_vec_state)
+  : n_rows( (in_vec_state == 2) ? 1 : 0 )
+  , n_cols( (in_vec_state == 1) ? 1 : 0 )
+  , n_elem(0)
+  , vec_state(in_vec_state)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  }
+
+
+
+//! constructor used by Row and Col classes
+template<typename eT>
+inline
+Mat<eT>::Mat(const arma_vec_indicator&, const uword in_n_rows, const uword in_n_cols, const uhword in_vec_state)
+  : n_rows(in_n_rows)
+  , n_cols(in_n_cols)
+  , n_elem(in_n_rows*in_n_cols)
+  , vec_state(in_vec_state)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init_cold();
+  }
+
+
+
+template<typename eT>
+inline
+Mat<eT>::Mat(const arma_fixed_indicator&, const uword in_n_rows, const uword in_n_cols, const uhword in_vec_state, const eT* in_mem)
+  : n_rows    (in_n_rows)
+  , n_cols    (in_n_cols)
+  , n_elem    (in_n_rows*in_n_cols)
+  , vec_state (in_vec_state)
+  , mem_state (3)
+  , mem       (in_mem)
+  {
+  arma_extra_debug_sigprint_this(this);
+  }
+
+
+
+template<typename eT>
+inline
+void
+Mat<eT>::init_cold()
+  {
+  arma_extra_debug_sigprint( arma_boost::format("n_rows = %d, n_cols = %d") % n_rows % n_cols );
+  
+  // ensure that n_elem can hold the result of (n_rows * n_cols)
+  
+  arma_debug_check
+    (
+      (
+      ( (n_rows > ARMA_MAX_UHWORD) || (n_cols > ARMA_MAX_UHWORD) )
+        ? ( (float(n_rows) * float(n_cols)) > float(ARMA_MAX_UWORD) )
+        : false
+      ),
+    "Mat::init(): requested size is too large"
+    );
+  
+  if(n_elem <= arma_config::mat_prealloc)
+    {
+    access::rw(mem) = mem_local;
+    }
+  else
+    {
+    arma_extra_debug_print("Mat::init(): allocating memory");
+    
+    access::rw(mem) = memory::acquire<eT>(n_elem);
+    
+    arma_check_bad_alloc( (mem == 0), "Mat::init(): out of memory" );
+    }
+  }
+
+
+
+//! internal matrix construction; if the requested size is small enough, memory from the stack is used. otherwise memory is allocated via 'new'
+template<typename eT>
+inline
+void
+Mat<eT>::init_warm(uword in_n_rows, uword in_n_cols)
+  {
+  arma_extra_debug_sigprint( arma_boost::format("in_n_rows = %d, in_n_cols = %d") % in_n_rows % in_n_cols );
+  
+  if( (n_rows == in_n_rows) && (n_cols == in_n_cols) )
+    {
+    return;
+    }
+  
+  bool  err_state = false;
+  char* err_msg   = 0;
+  
+  const uhword t_vec_state = vec_state;
+  const uhword t_mem_state = mem_state;
+  
+  arma_debug_set_error
+    (
+    err_state,
+    err_msg,
+    (t_mem_state == 3),
+    "Mat::init(): size is fixed and hence cannot be changed"
+    );
+  
+  if(t_vec_state > 0)
+    {
+    if( (in_n_rows == 0) && (in_n_cols == 0) )
+      {
+      if(t_vec_state == 1)
+        {
+        in_n_cols = 1;
+        }
+      else
+      if(t_vec_state == 2)
+        {
+        in_n_rows = 1;
+        }
+      }
+    else
+      {
+      arma_debug_set_error
+        (
+        err_state,
+        err_msg,
+        ( ((t_vec_state == 1) && (in_n_cols != 1)) || ((t_vec_state == 2) && (in_n_rows != 1)) ),
+        "Mat::init(): object is a row or column vector; requested size is not compatible"
+        );
+      }
+    }
+  
+  // ensure that n_elem can hold the result of (n_rows * n_cols)
+  
+  arma_debug_set_error
+    (
+    err_state,
+    err_msg,
+      (
+      ( (in_n_rows > ARMA_MAX_UHWORD) || (in_n_cols > ARMA_MAX_UHWORD) )
+        ? ( (float(in_n_rows) * float(in_n_cols)) > float(ARMA_MAX_UWORD) )
+        : false
+      ),
+    "Mat::init(): requested size is too large"
+    );
+  
+  arma_debug_check(err_state, err_msg);
+  
+  const uword old_n_elem = n_elem;
+  const uword new_n_elem = in_n_rows * in_n_cols;
+  
+  if(old_n_elem == new_n_elem)
+    {
+    arma_extra_debug_print("Mat::init(): reusing memory");
+    
+    access::rw(n_rows) = in_n_rows;
+    access::rw(n_cols) = in_n_cols;
+    }
+  else
+    {
+    arma_debug_check
+      (
+      (t_mem_state == 2),
+      "Mat::init(): mismatch between size of auxiliary memory and requested size"
+      );
+    
+    if(t_mem_state == 0)
+      {
+      if(old_n_elem > arma_config::mat_prealloc)
+        {
+        arma_extra_debug_print("Mat::init(): freeing memory");
+        
+        memory::release( access::rw(mem) );
+        }
+      }
+    
+    
+    if(new_n_elem <= arma_config::mat_prealloc)
+      {
+      access::rw(mem) = mem_local;
+      }
+    else
+      {
+      arma_extra_debug_print("Mat::init(): allocating memory");
+      
+      access::rw(mem) = memory::acquire<eT>(new_n_elem);
+      
+      arma_check_bad_alloc( (mem == 0), "Mat::init(): out of memory" );
+      }
+    
+    access::rw(n_rows)    = in_n_rows;
+    access::rw(n_cols)    = in_n_cols;
+    access::rw(n_elem)    = new_n_elem;
+    access::rw(mem_state) = 0;
+    }
+  }
+
+
+
+//! create the matrix from a textual description
+template<typename eT>
+inline
+Mat<eT>::Mat(const char* text)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init( std::string(text) );
+  }
+  
+  
+  
+//! create the matrix from a textual description
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const char* text)
+  {
+  arma_extra_debug_sigprint();
+  
+  init( std::string(text) );
+  return *this;
+  }
+  
+  
+
+//! create the matrix from a textual description
+template<typename eT>
+inline
+Mat<eT>::Mat(const std::string& text)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init(text);
+  }
+  
+  
+  
+//! create the matrix from a textual description
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const std::string& text)
+  {
+  arma_extra_debug_sigprint();
+  
+  init(text);
+  return *this;
+  }
+
+
+
+//! internal function to create the matrix from a textual description
+template<typename eT>
+inline 
+void
+Mat<eT>::init(const std::string& text)
+  {
+  arma_extra_debug_sigprint();
+  
+  //
+  // work out the size
+  
+  uword t_n_rows = 0;
+  uword t_n_cols = 0;
+  
+  bool t_n_cols_found = false;
+  
+  std::string token;
+  
+  std::string::size_type line_start = 0;
+  std::string::size_type   line_end = 0;
+  
+  while( line_start < text.length() )
+    {
+    
+    line_end = text.find(';', line_start);
+    
+    if(line_end == std::string::npos)
+      line_end = text.length()-1;
+    
+    std::string::size_type line_len = line_end - line_start + 1;
+    std::stringstream line_stream( text.substr(line_start,line_len) );
+    
+    
+    uword line_n_cols = 0;
+    while(line_stream >> token)
+      {
+      ++line_n_cols;
+      }
+    
+    
+    if(line_n_cols > 0)
+      {
+      if(t_n_cols_found == false)
+        {
+        t_n_cols = line_n_cols;
+        t_n_cols_found = true;
+        }
+      else
+        arma_check( (line_n_cols != t_n_cols), "Mat::init(): inconsistent number of columns in given string");
+      
+      ++t_n_rows;
+      }
+    line_start = line_end+1;
+    
+    }
+    
+  Mat<eT>& x = *this;
+  x.set_size(t_n_rows, t_n_cols);
+  
+  line_start = 0;
+  line_end = 0;
+  
+  uword urow = 0;
+  
+  while( line_start < text.length() )
+    {
+    
+    line_end = text.find(';', line_start);
+    
+    if(line_end == std::string::npos)
+      line_end = text.length()-1;
+    
+    std::string::size_type line_len = line_end - line_start + 1;
+    std::stringstream line_stream( text.substr(line_start,line_len) );
+    
+//     uword ucol = 0;
+//     while(line_stream >> token)
+//       {
+//       x.at(urow,ucol) = strtod(token.c_str(), 0);
+//       ++ucol;
+//       }
+    
+    uword ucol = 0;
+    eT val;
+    while(line_stream >> val)
+      {
+      x.at(urow,ucol) = val;
+      ++ucol;
+      }
+    
+    ++urow;
+    line_start = line_end+1;
+    }
+  
+  }
+
+
+
+//! create the matrix from std::vector
+template<typename eT>
+inline
+Mat<eT>::Mat(const std::vector<eT>& x)
+  : n_rows(uword(x.size()))
+  , n_cols(1)
+  , n_elem(uword(x.size()))
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init_cold();
+  
+  if(n_elem > 0)
+    {
+    arrayops::copy( memptr(), &(x[0]), n_elem );
+    }
+  }
+  
+  
+  
+//! create the matrix from std::vector
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const std::vector<eT>& x)
+  {
+  arma_extra_debug_sigprint();
+  
+  init_warm(uword(x.size()), 1);
+  
+  if(x.size() > 0)
+    {
+    arrayops::copy( memptr(), &(x[0]), uword(x.size()) );
+    }
+  
+  return *this;
+  }
+
+
+
+#if defined(ARMA_USE_CXX11)
+  
+  template<typename eT>
+  inline
+  Mat<eT>::Mat(const std::initializer_list<eT>& list)
+    : n_rows(0)
+    , n_cols(0)
+    , n_elem(0)
+    , vec_state(0)
+    , mem_state(0)
+    , mem()
+    {
+    arma_extra_debug_sigprint_this(this);
+    
+    init(list);
+    }
+  
+  
+  
+  template<typename eT>
+  inline
+  const Mat<eT>&
+  Mat<eT>::operator=(const std::initializer_list<eT>& list)
+    {
+    arma_extra_debug_sigprint();
+    
+    init(list);
+    
+    return *this;
+    }
+  
+#endif
+  
+
+
+//! Set the matrix to be equal to the specified scalar.
+//! NOTE: the size of the matrix will be 1x1
+template<typename eT>
+arma_inline
+const Mat<eT>&
+Mat<eT>::operator=(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  init_warm(1,1);
+  access::rw(mem[0]) = val;
+  return *this;
+  }
+
+
+
+//! In-place addition of a scalar to all elements of the matrix
+template<typename eT>
+arma_inline
+const Mat<eT>&
+Mat<eT>::operator+=(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  arrayops::inplace_plus( memptr(), val, n_elem );
+  
+  return *this;
+  }
+
+
+
+//! In-place subtraction of a scalar from all elements of the matrix
+template<typename eT>
+arma_inline
+const Mat<eT>&
+Mat<eT>::operator-=(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  arrayops::inplace_minus( memptr(), val, n_elem );
+  
+  return *this;
+  }
+
+
+
+//! In-place multiplication of all elements of the matrix with a scalar
+template<typename eT>
+arma_inline
+const Mat<eT>&
+Mat<eT>::operator*=(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  arrayops::inplace_mul( memptr(), val, n_elem );
+  
+  return *this;
+  }
+
+
+
+//! In-place division of all elements of the matrix with a scalar
+template<typename eT>
+arma_inline
+const Mat<eT>&
+Mat<eT>::operator/=(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  arrayops::inplace_div( memptr(), val, n_elem );
+  
+  return *this;
+  }
+
+
+
+//! construct a matrix from a given matrix
+template<typename eT>
+inline
+Mat<eT>::Mat(const Mat<eT>& in_mat)
+  : n_rows(in_mat.n_rows)
+  , n_cols(in_mat.n_cols)
+  , n_elem(in_mat.n_elem)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint(arma_boost::format("this = %x   in_mat = %x") % this % &in_mat);
+  
+  init_cold();
+  
+  arrayops::copy( memptr(), in_mat.mem, in_mat.n_elem );
+  }
+
+
+
+//! construct a matrix from a given matrix
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const Mat<eT>& in_mat)
+  {
+  arma_extra_debug_sigprint(arma_boost::format("this = %x   in_mat = %x") % this % &in_mat);
+  
+  if(this != &in_mat)
+    {
+    init_warm(in_mat.n_rows, in_mat.n_cols);
+    
+    arrayops::copy( memptr(), in_mat.mem, in_mat.n_elem );
+    }
+  
+  return *this;
+  }
+
+
+
+#if defined(ARMA_USE_CXX11)
+
+template<typename eT>
+inline
+void
+Mat<eT>::init(const std::initializer_list<eT>& list)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword N = list.size();
+  
+  set_size(1, N);
+  
+  arrayops::copy( memptr(), list.begin(), N );
+  }
+
+#endif
+
+
+
+//! for constructing a complex matrix out of two non-complex matrices
+template<typename eT>
+template<typename T1, typename T2>
+inline
+void
+Mat<eT>::init
+  (
+  const Base<typename Mat<eT>::pod_type, T1>& X,
+  const Base<typename Mat<eT>::pod_type, T2>& Y
+  )
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type T;
+  
+  arma_type_check(( is_complex<eT>::value == false ));   //!< compile-time abort if eT isn't std::complex
+  arma_type_check(( is_complex< T>::value == true  ));   //!< compile-time abort if T is std::complex
+  
+  arma_type_check(( is_same_type< std::complex<T>, eT >::value == false ));   //!< compile-time abort if types are not compatible
+  
+  const Proxy<T1> PX(X.get_ref());
+  const Proxy<T2> PY(Y.get_ref());
+  
+  arma_debug_assert_same_size(PX, PY, "Mat()");
+  
+  const uword local_n_rows = PX.get_n_rows();
+  const uword local_n_cols = PX.get_n_cols();
+  
+  init_warm(local_n_rows, local_n_cols);
+  
+  eT* out_mem = (*this).memptr();
+  
+  const bool prefer_at_accessor = ( Proxy<T1>::prefer_at_accessor || Proxy<T2>::prefer_at_accessor );
+  
+  if(prefer_at_accessor == false)
+    {
+    typedef typename Proxy<T1>::ea_type ea_type1;
+    typedef typename Proxy<T2>::ea_type ea_type2;
+  
+    const uword N = n_elem;
+    
+    ea_type1 A = PX.get_ea();
+    ea_type2 B = PY.get_ea();
+    
+    for(uword ii=0; ii < N; ++ii)
+      {
+      out_mem[ii] = std::complex<T>(A[ii], B[ii]);
+      }
+    }
+  else
+    {
+    for(uword ucol=0; ucol < local_n_cols; ++ucol)
+    for(uword urow=0; urow < local_n_rows; ++urow)
+      {
+      *out_mem = std::complex<T>(PX.at(urow,ucol), PY.at(urow,ucol));
+      out_mem++;
+      }
+    }
+  }
+
+
+
+//! EXPERIMENTAL: swap the contents of this matrix, denoted as matrix A, with given matrix B
+template<typename eT>
+inline
+void
+Mat<eT>::swap(Mat<eT>& B)
+  {
+  Mat<eT>& A = (*this);
+  
+  arma_extra_debug_sigprint(arma_boost::format("A = %x   B = %x") % &A % &B);
+  
+  arma_debug_check( (A.vec_state != B.vec_state), "Mat::swap(): incompatible object types" );
+  
+  const uhword A_mem_state = A.mem_state;
+  const uhword B_mem_state = B.mem_state;
+  
+  if( (A_mem_state == 0) && (B_mem_state == 0) )
+    {
+    const uword A_n_elem = A.n_elem;
+    const uword B_n_elem = B.n_elem;
+    
+    const bool A_use_local_mem = (A_n_elem <= arma_config::mat_prealloc);
+    const bool B_use_local_mem = (B_n_elem <= arma_config::mat_prealloc);
+    
+    if( (A_use_local_mem == false) && (B_use_local_mem == false) )
+      {
+      std::swap( access::rw(A.mem), access::rw(B.mem) );
+      }
+    else
+    if( (A_use_local_mem == true) && (B_use_local_mem == true) )
+      {
+      const uword N = (std::max)(A_n_elem, B_n_elem);
+      
+      eT* A_mem = A.memptr();
+      eT* B_mem = B.memptr();
+      
+      for(uword ii=0; ii < N; ++ii)  { std::swap( A_mem[ii], B_mem[ii] ); }
+      }
+    else
+    if( (A_use_local_mem == true) && (B_use_local_mem == false) )
+      {
+      eT* A_mem_local = &(A.mem_local[0]);
+      eT* B_mem_local = &(B.mem_local[0]);
+      
+      arrayops::copy(B_mem_local, A_mem_local, A_n_elem);
+      
+      access::rw(A.mem) = B.mem;
+      access::rw(B.mem) = B_mem_local;
+      }
+    else
+    if( (A_use_local_mem == false) && (B_use_local_mem == true) )
+      {
+      eT* A_mem_local = &(A.mem_local[0]);
+      eT* B_mem_local = &(B.mem_local[0]);
+      
+      arrayops::copy(A_mem_local, B_mem_local, B_n_elem);
+      
+      access::rw(B.mem) = A.mem;
+      access::rw(A.mem) = A_mem_local;
+      }
+    
+    std::swap( access::rw(A.n_rows), access::rw(B.n_rows) );
+    std::swap( access::rw(A.n_cols), access::rw(B.n_cols) );
+    std::swap( access::rw(A.n_elem), access::rw(B.n_elem) );
+    }
+  else
+  if( (A_mem_state == 3) && (B_mem_state == 3) )
+    {
+    arma_debug_check( ((A.n_rows != B.n_rows) || (A.n_cols != B.n_cols)), "Mat::swap(): incompatible object types" );
+    
+    const uword N = A.n_elem;
+    
+    eT* A_mem = A.memptr();
+    eT* B_mem = B.memptr();
+    
+    for(uword ii=0; ii < N; ++ii)  { std::swap(A_mem[ii], B_mem[ii]); }
+    }
+  else
+    {
+    arma_bad("Mat::swap(): incompatible object types");
+    }
+  }
+
+
+
+//! try to steal the memory from a given matrix; 
+//! if memory can't be stolen, copy the given matrix
+template<typename eT>
+inline
+void
+Mat<eT>::steal_mem(Mat<eT>& x)
+  {
+  arma_extra_debug_sigprint();
+  
+  if(this != &x)
+    {
+    const uword x_n_rows    = x.n_rows;
+    const uword x_n_cols    = x.n_cols;
+    const uword x_n_elem    = x.n_elem;
+    const uword x_vec_state = x.vec_state;
+    const uword x_mem_state = x.mem_state;
+    
+    const uword t_vec_state = vec_state;
+    
+    bool layout_ok = false;
+    
+    if(t_vec_state == x_vec_state)
+      {
+      layout_ok = true;
+      }
+    else
+      {
+      if( (t_vec_state == 1) && ( x_n_cols == 1) )
+        {
+        layout_ok = true;
+        }
+      
+      if( (t_vec_state == 2) && ( x_n_rows == 1) )
+        {
+        layout_ok = true;
+        }
+      }
+    
+    
+    if( (x_mem_state == 0) && (x_n_elem > arma_config::mat_prealloc) && (layout_ok == true) )
+      {
+      reset();
+      // note: calling reset() also prevents fixed size matrices from changing size or using non-local memory
+      
+      access::rw(n_rows) = x_n_rows;
+      access::rw(n_cols) = x_n_cols;
+      access::rw(n_elem) = x_n_elem;
+      access::rw(mem)    = x.mem;
+      
+      access::rw(x.n_rows) = 0;
+      access::rw(x.n_cols) = 0;
+      access::rw(x.n_elem) = 0;
+      access::rw(x.mem)    = 0;
+      }
+    else
+      {
+      (*this).operator=(x);
+      }
+    }
+  }
+
+
+
+//! construct a matrix from a given auxiliary array of eTs.
+//! if copy_aux_mem is true, new memory is allocated and the array is copied.
+//! if copy_aux_mem is false, the auxiliary array is used directly (without allocating memory and copying).
+//! the default is to copy the array.
+
+template<typename eT>
+inline
+Mat<eT>::Mat(eT* aux_mem, const uword aux_n_rows, const uword aux_n_cols, const bool copy_aux_mem, const bool strict)
+  : n_rows   ( aux_n_rows                            )
+  , n_cols   ( aux_n_cols                            )
+  , n_elem   ( aux_n_rows*aux_n_cols                 )
+  , vec_state( 0                                     )
+  , mem_state( copy_aux_mem ? 0 : ( strict ? 2 : 1 ) )
+  , mem      ( copy_aux_mem ? 0 : aux_mem            )
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  if(copy_aux_mem == true)
+    {
+    init_cold();
+    
+    arrayops::copy( memptr(), aux_mem, n_elem );
+    }
+  }
+
+
+
+//! construct a matrix from a given auxiliary read-only array of eTs.
+//! the array is copied.
+template<typename eT>
+inline
+Mat<eT>::Mat(const eT* aux_mem, const uword aux_n_rows, const uword aux_n_cols)
+  : n_rows(aux_n_rows)
+  , n_cols(aux_n_cols)
+  , n_elem(aux_n_rows*aux_n_cols)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init_cold();
+  
+  arrayops::copy( memptr(), aux_mem, n_elem );
+  }
+
+
+
+//! DANGEROUS! Construct a temporary matrix, using auxiliary memory.
+//! This constructor is NOT intended for usage by user code.
+//! Its sole purpose is to be used by the Cube class.
+
+template<typename eT>
+inline
+Mat<eT>::Mat(const char junk, const eT* aux_mem, const uword aux_n_rows, const uword aux_n_cols)
+  : n_rows   (aux_n_rows           )
+  , n_cols   (aux_n_cols           )
+  , n_elem   (aux_n_rows*aux_n_cols)
+  , vec_state(0                    )
+  , mem_state(3                    )
+  , mem      (aux_mem              )
+  {
+  arma_extra_debug_sigprint_this(this);
+  arma_ignore(junk);
+  }
+
+
+
+//! in-place matrix addition
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const Mat<eT>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(*this, m, "addition");
+  
+  arrayops::inplace_plus( memptr(), m.memptr(), n_elem );
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix subtraction
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const Mat<eT>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(*this, m, "subtraction");
+  
+  arrayops::inplace_minus( memptr(), m.memptr(), n_elem );
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix multiplication
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const Mat<eT>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  glue_times::apply_inplace(*this, m);
+  
+  return *this;
+  }
+
+
+
+//! in-place element-wise matrix multiplication
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const Mat<eT>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(*this, m, "element-wise multiplication");
+  
+  arrayops::inplace_mul( memptr(), m.memptr(), n_elem );
+  
+  return *this;
+  }
+
+
+
+//! in-place element-wise matrix division
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const Mat<eT>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(*this, m, "element-wise division");
+  
+  arrayops::inplace_div( memptr(), m.memptr(), n_elem );
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+Mat<eT>::Mat(const BaseCube<eT,T1>& X)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  (*this).operator=(X);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const BaseCube<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& out = *this;
+  
+  const unwrap_cube<T1> tmp(X.get_ref());
+  const Cube<eT>& in  = tmp.M;
+  
+  arma_debug_assert_cube_as_mat(out, in, "copy into matrix", false);
+  
+  const uword in_n_rows   = in.n_rows;
+  const uword in_n_cols   = in.n_cols;
+  const uword in_n_slices = in.n_slices;
+  
+  const uword out_vec_state = out.vec_state;
+  
+  if(in_n_slices == 1)
+    {
+    out.set_size(in_n_rows, in_n_cols);
+    
+    for(uword ucol=0; ucol < in_n_cols; ++ucol)
+      {
+      arrayops::copy( out.colptr(ucol), in.slice_colptr(0, ucol), in_n_rows );
+      }
+    }
+  else
+    {
+    if(out_vec_state == 0)
+      {
+      if(in_n_cols == 1)
+        {
+        out.set_size(in_n_rows, in_n_slices);
+        
+        for(uword i=0; i < in_n_slices; ++i)
+          {
+          arrayops::copy( out.colptr(i), in.slice_colptr(i, 0), in_n_rows );
+          }
+        }
+      else
+      if(in_n_rows == 1)
+        {
+        out.set_size(in_n_cols, in_n_slices);
+        
+        for(uword slice=0; slice < in_n_slices; ++slice)
+          {
+          eT* out_colptr = out.colptr(slice);
+          
+          uword i,j;
+          for(i=0, j=1; j < in_n_cols; i+=2, j+=2)
+            {
+            const eT tmp_i = in.at(0, i, slice);
+            const eT tmp_j = in.at(0, j, slice);
+            
+            out_colptr[i] = tmp_i;
+            out_colptr[j] = tmp_j;
+            }
+          
+          if(i < in_n_cols)
+            {
+            out_colptr[i] = in.at(0, i, slice);
+            }
+          }
+        }
+      }
+    else
+      {
+      out.set_size(in_n_slices);
+      
+      eT* out_mem = out.memptr();
+      
+      for(uword i=0; i<in_n_slices; ++i)
+        {
+        out_mem[i] = in.at(0, 0, i);
+        }
+      }
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const BaseCube<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& out = *this;
+  
+  const unwrap_cube<T1> tmp(X.get_ref());
+  const Cube<eT>& in  = tmp.M;
+  
+  arma_debug_assert_cube_as_mat(out, in, "addition", true);
+  
+  const uword in_n_rows   = in.n_rows;
+  const uword in_n_cols   = in.n_cols;
+  const uword in_n_slices = in.n_slices;
+  
+  const uword out_n_rows    = out.n_rows;
+  const uword out_n_cols    = out.n_cols;
+  const uword out_vec_state = out.vec_state;
+  
+  if(in_n_slices == 1)
+    {
+    for(uword ucol=0; ucol < in_n_cols; ++ucol)
+      {
+      arrayops::inplace_plus( out.colptr(ucol), in.slice_colptr(0, ucol), in_n_rows );
+      }
+    }
+  else
+    {
+    if(out_vec_state == 0)
+      {
+      if( (in_n_rows == out_n_rows) && (in_n_cols == 1) && (in_n_slices == out_n_cols) )
+        {
+        for(uword i=0; i < in_n_slices; ++i)
+          {
+          arrayops::inplace_plus( out.colptr(i), in.slice_colptr(i, 0), in_n_rows );
+          }
+        }
+      else
+      if( (in_n_rows == 1) && (in_n_cols == out_n_rows) && (in_n_slices == out_n_cols) )
+        {
+        for(uword slice=0; slice < in_n_slices; ++slice)
+          {
+          eT* out_colptr = out.colptr(slice);
+          
+          uword i,j;
+          for(i=0, j=1; j < in_n_cols; i+=2, j+=2)
+            {
+            const eT tmp_i = in.at(0, i, slice);
+            const eT tmp_j = in.at(0, j, slice);
+            
+            out_colptr[i] += tmp_i;
+            out_colptr[j] += tmp_j;
+            }
+          
+          if(i < in_n_cols)
+            {
+            out_colptr[i] += in.at(0, i, slice);
+            }
+          }
+        }
+      }
+    else
+      {
+      eT* out_mem = out.memptr();
+      
+      for(uword i=0; i<in_n_slices; ++i)
+        {
+        out_mem[i] += in.at(0, 0, i);
+        }
+      }
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const BaseCube<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& out = *this;
+  
+  const unwrap_cube<T1> tmp(X.get_ref());
+  const Cube<eT>& in  = tmp.M;
+  
+  arma_debug_assert_cube_as_mat(out, in, "subtraction", true);
+  
+  const uword in_n_rows   = in.n_rows;
+  const uword in_n_cols   = in.n_cols;
+  const uword in_n_slices = in.n_slices;
+  
+  const uword out_n_rows    = out.n_rows;
+  const uword out_n_cols    = out.n_cols;
+  const uword out_vec_state = out.vec_state;
+  
+  if(in_n_slices == 1)
+    {
+    for(uword ucol=0; ucol < in_n_cols; ++ucol)
+      {
+      arrayops::inplace_minus( out.colptr(ucol), in.slice_colptr(0, ucol), in_n_rows );
+      }
+    }
+  else
+    {
+    if(out_vec_state == 0)
+      {
+      if( (in_n_rows == out_n_rows) && (in_n_cols == 1) && (in_n_slices == out_n_cols) )
+        {
+        for(uword i=0; i < in_n_slices; ++i)
+          {
+          arrayops::inplace_minus( out.colptr(i), in.slice_colptr(i, 0), in_n_rows );
+          }
+        }
+      else
+      if( (in_n_rows == 1) && (in_n_cols == out_n_rows) && (in_n_slices == out_n_cols) )
+        {
+        for(uword slice=0; slice < in_n_slices; ++slice)
+          {
+          eT* out_colptr = out.colptr(slice);
+          
+          uword i,j;
+          for(i=0, j=1; j < in_n_cols; i+=2, j+=2)
+            {
+            const eT tmp_i = in.at(0, i, slice);
+            const eT tmp_j = in.at(0, j, slice);
+            
+            out_colptr[i] -= tmp_i;
+            out_colptr[j] -= tmp_j;
+            }
+          
+          if(i < in_n_cols)
+            {
+            out_colptr[i] -= in.at(0, i, slice);
+            }
+          }
+        }
+      }
+    else
+      {
+      eT* out_mem = out.memptr();
+      
+      for(uword i=0; i<in_n_slices; ++i)
+        {
+        out_mem[i] -= in.at(0, 0, i);
+        }
+      }
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const BaseCube<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> B(X);
+  
+  (*this).operator*=(B);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const BaseCube<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& out = *this;
+  
+  const unwrap_cube<T1> tmp(X.get_ref());
+  const Cube<eT>& in  = tmp.M;
+  
+  arma_debug_assert_cube_as_mat(out, in, "element-wise multiplication", true);
+  
+  const uword in_n_rows   = in.n_rows;
+  const uword in_n_cols   = in.n_cols;
+  const uword in_n_slices = in.n_slices;
+  
+  const uword out_n_rows    = out.n_rows;
+  const uword out_n_cols    = out.n_cols;
+  const uword out_vec_state = out.vec_state;
+  
+  if(in_n_slices == 1)
+    {
+    for(uword ucol=0; ucol < in_n_cols; ++ucol)
+      {
+      arrayops::inplace_mul( out.colptr(ucol), in.slice_colptr(0, ucol), in_n_rows );
+      }
+    }
+  else
+    {
+    if(out_vec_state == 0)
+      {
+      if( (in_n_rows == out_n_rows) && (in_n_cols == 1) && (in_n_slices == out_n_cols) )
+        {
+        for(uword i=0; i < in_n_slices; ++i)
+          {
+          arrayops::inplace_mul( out.colptr(i), in.slice_colptr(i, 0), in_n_rows );
+          }
+        }
+      else
+      if( (in_n_rows == 1) && (in_n_cols == out_n_rows) && (in_n_slices == out_n_cols) )
+        {
+        for(uword slice=0; slice < in_n_slices; ++slice)
+          {
+          eT* out_colptr = out.colptr(slice);
+          
+          uword i,j;
+          for(i=0, j=1; j < in_n_cols; i+=2, j+=2)
+            {
+            const eT tmp_i = in.at(0, i, slice);
+            const eT tmp_j = in.at(0, j, slice);
+            
+            out_colptr[i] *= tmp_i;
+            out_colptr[j] *= tmp_j;
+            }
+          
+          if(i < in_n_cols)
+            {
+            out_colptr[i] *= in.at(0, i, slice);
+            }
+          }
+        }
+      }
+    else
+      {
+      eT* out_mem = out.memptr();
+      
+      for(uword i=0; i<in_n_slices; ++i)
+        {
+        out_mem[i] *= in.at(0, 0, i);
+        }
+      }
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const BaseCube<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& out = *this;
+  
+  const unwrap_cube<T1> tmp(X.get_ref());
+  const Cube<eT>& in  = tmp.M;
+  
+  arma_debug_assert_cube_as_mat(out, in, "element-wise division", true);
+  
+  const uword in_n_rows   = in.n_rows;
+  const uword in_n_cols   = in.n_cols;
+  const uword in_n_slices = in.n_slices;
+  
+  const uword out_n_rows    = out.n_rows;
+  const uword out_n_cols    = out.n_cols;
+  const uword out_vec_state = out.vec_state;
+  
+  if(in_n_slices == 1)
+    {
+    for(uword ucol=0; ucol < in_n_cols; ++ucol)
+      {
+      arrayops::inplace_div( out.colptr(ucol), in.slice_colptr(0, ucol), in_n_rows );
+      }
+    }
+  else
+    {
+    if(out_vec_state == 0)
+      {
+      if( (in_n_rows == out_n_rows) && (in_n_cols == 1) && (in_n_slices == out_n_cols) )
+        {
+        for(uword i=0; i < in_n_slices; ++i)
+          {
+          arrayops::inplace_div( out.colptr(i), in.slice_colptr(i, 0), in_n_rows );
+          }
+        }
+      else
+      if( (in_n_rows == 1) && (in_n_cols == out_n_rows) && (in_n_slices == out_n_cols) )
+        {
+        for(uword slice=0; slice < in_n_slices; ++slice)
+          {
+          eT* out_colptr = out.colptr(slice);
+          
+          uword i,j;
+          for(i=0, j=1; j < in_n_cols; i+=2, j+=2)
+            {
+            const eT tmp_i = in.at(0, i, slice);
+            const eT tmp_j = in.at(0, j, slice);
+            
+            out_colptr[i] /= tmp_i;
+            out_colptr[j] /= tmp_j;
+            }
+          
+          if(i < in_n_cols)
+            {
+            out_colptr[i] /= in.at(0, i, slice);
+            }
+          }
+        }
+      }
+    else
+      {
+      eT* out_mem = out.memptr();
+      
+      for(uword i=0; i<in_n_slices; ++i)
+        {
+        out_mem[i] /= in.at(0, 0, i);
+        }
+      }
+    }
+  
+  return *this;
+  }
+
+
+
+//! for constructing a complex matrix out of two non-complex matrices
+template<typename eT>
+template<typename T1, typename T2>
+inline
+Mat<eT>::Mat
+  (
+  const Base<typename Mat<eT>::pod_type,T1>& A,
+  const Base<typename Mat<eT>::pod_type,T2>& B
+  )
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init(A,B);
+  }
+
+
+
+//! construct a matrix from subview (e.g. construct a matrix from a delayed submatrix operation)
+template<typename eT>
+inline
+Mat<eT>::Mat(const subview<eT>& X)
+  : n_rows(X.n_rows)
+  , n_cols(X.n_cols)
+  , n_elem(X.n_elem)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init_cold();
+  
+  subview<eT>::extract(*this, X);
+  }
+
+
+
+//! construct a matrix from subview (e.g. construct a matrix from a delayed submatrix operation)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const subview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const bool alias = (this == &(X.m));
+  
+  if(alias == false)
+    {
+    init_warm(X.n_rows, X.n_cols);
+    
+    subview<eT>::extract(*this, X);
+    }
+  else
+    {
+    Mat<eT> tmp(X);
+    
+    steal_mem(tmp);
+    }
+  
+  return *this;
+  }
+
+
+//! in-place matrix addition (using a submatrix on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const subview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview<eT>::plus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+//! in-place matrix subtraction (using a submatrix on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const subview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview<eT>::minus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix mutiplication (using a submatrix on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const subview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  glue_times::apply_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place element-wise matrix mutiplication (using a submatrix on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const subview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview<eT>::schur_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place element-wise matrix division (using a submatrix on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const subview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview<eT>::div_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+Mat<eT>::Mat(const subview_row_strans<eT>& X)
+  : n_rows(X.n_rows)
+  , n_cols(X.n_cols)
+  , n_elem(X.n_elem)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init_cold();
+  
+  X.extract(*this);
+  }
+
+
+
+template<typename eT>
+inline
+Mat<eT>::Mat(const subview_row_htrans<eT>& X)
+  : n_rows(X.n_rows)
+  , n_cols(X.n_cols)
+  , n_elem(X.n_elem)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init_cold();
+  
+  X.extract(*this);
+  }
+
+
+
+template<typename eT>
+inline
+Mat<eT>::Mat(const xvec_htrans<eT>& X)
+  : n_rows(X.n_rows)
+  , n_cols(X.n_cols)
+  , n_elem(X.n_elem)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init_cold();
+  
+  X.extract(*this);
+  }
+
+
+
+//! construct a matrix from a subview_cube instance
+template<typename eT>
+inline
+Mat<eT>::Mat(const subview_cube<eT>& x)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  this->operator=(x);
+  }
+
+
+
+//! construct a matrix from a subview_cube instance
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const subview_cube<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_cube<eT>::extract(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix addition (using a single-slice subcube on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const subview_cube<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+
+  subview_cube<eT>::plus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix subtraction (using a single-slice subcube on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const subview_cube<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_cube<eT>::minus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix mutiplication (using a single-slice subcube on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const subview_cube<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+
+  const Mat<eT> tmp(X);
+  glue_times::apply_inplace(*this, tmp);
+  
+  return *this;
+  }
+
+
+
+//! in-place element-wise matrix mutiplication (using a single-slice subcube on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const subview_cube<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_cube<eT>::schur_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place element-wise matrix division (using a single-slice subcube on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const subview_cube<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_cube<eT>::div_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! construct a matrix from diagview (e.g. construct a matrix from a delayed diag operation)
+template<typename eT>
+inline
+Mat<eT>::Mat(const diagview<eT>& X)
+  : n_rows(X.n_rows)
+  , n_cols(X.n_cols)
+  , n_elem(X.n_elem)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  init_cold();
+  
+  diagview<eT>::extract(*this, X);
+  }
+
+
+
+//! construct a matrix from diagview (e.g. construct a matrix from a delayed diag operation)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const diagview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const bool alias = (this == &(X.m));
+  
+  if(alias == false)
+    {
+    init_warm(X.n_rows, X.n_cols);
+    
+    diagview<eT>::extract(*this, X);
+    }
+  else
+    {
+    Mat<eT> tmp(X);
+    
+    steal_mem(tmp);
+    }
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix addition (using a diagview on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const diagview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  diagview<eT>::plus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+//! in-place matrix subtraction (using a diagview on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const diagview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  diagview<eT>::minus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix mutiplication (using a diagview on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const diagview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  glue_times::apply_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place element-wise matrix mutiplication (using a diagview on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const diagview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  diagview<eT>::schur_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place element-wise matrix division (using a diagview on the right-hand-side)
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const diagview<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  diagview<eT>::div_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+Mat<eT>::Mat(const subview_elem1<eT,T1>& X)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  this->operator=(X);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const subview_elem1<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem1<eT,T1>::extract(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const subview_elem1<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem1<eT,T1>::plus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const subview_elem1<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem1<eT,T1>::minus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const subview_elem1<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  glue_times::apply_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const subview_elem1<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem1<eT,T1>::schur_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const subview_elem1<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem1<eT,T1>::div_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+inline
+Mat<eT>::Mat(const subview_elem2<eT,T1,T2>& X)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  this->operator=(X);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const subview_elem2<eT,T1,T2>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem2<eT,T1,T2>::extract(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const subview_elem2<eT,T1,T2>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem2<eT,T1,T2>::plus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const subview_elem2<eT,T1,T2>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem2<eT,T1,T2>::minus_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const subview_elem2<eT,T1,T2>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  glue_times::apply_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const subview_elem2<eT,T1,T2>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem2<eT,T1,T2>::schur_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const subview_elem2<eT,T1,T2>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  subview_elem2<eT,T1,T2>::div_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+Mat<eT>::Mat(const SpBase<eT, T1>& m)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  const SpProxy<T1> p(m.get_ref());
+  
+  access::rw(n_rows) = p.get_n_rows();
+  access::rw(n_cols) = p.get_n_cols();
+  access::rw(n_elem) = p.get_n_elem();
+  
+  init_cold();
+  fill(eT(0));
+  
+  typename SpProxy<T1>::const_iterator_type it     = p.begin();
+  typename SpProxy<T1>::const_iterator_type it_end = p.end();
+  
+  while(it != it_end)
+    {
+    at(it.row(), it.col()) = (*it);
+    ++it;
+    }
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const SpBase<eT, T1>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  const SpProxy<T1> p(m.get_ref());
+  
+  init_warm(p.get_n_rows(), p.get_n_cols());
+  
+  fill(eT(0));
+  
+  typename SpProxy<T1>::const_iterator_type it     = p.begin();
+  typename SpProxy<T1>::const_iterator_type it_end = p.end();
+  
+  while(it != it_end)
+    {
+    at(it.row(), it.col()) = (*it);
+    ++it;
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const SpBase<eT, T1>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  const SpProxy<T1> p(m.get_ref());
+  
+  arma_debug_assert_same_size(n_rows, n_cols, p.get_n_rows(), p.get_n_cols(), "addition");
+  
+  typename SpProxy<T1>::const_iterator_type it     = p.begin();
+  typename SpProxy<T1>::const_iterator_type it_end = p.end();
+  
+  while(it != it_end)
+    {
+    at(it.row(), it.col()) += (*it);
+    ++it;
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const SpBase<eT, T1>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  const SpProxy<T1> p(m.get_ref());
+  
+  arma_debug_assert_same_size(n_rows, n_cols, p.get_n_rows(), p.get_n_cols(), "subtraction");
+  
+  typename SpProxy<T1>::const_iterator_type it     = p.begin();
+  typename SpProxy<T1>::const_iterator_type it_end = p.end();
+  
+  while(it != it_end)
+    {
+    at(it.row(), it.col()) -= (*it);
+    ++it;
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const SpBase<eT, T1>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT> z;
+  z = (*this) * m.get_ref();
+  steal_mem(z);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const SpBase<eT, T1>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  const SpProxy<T1> p(m.get_ref());
+  
+  arma_debug_assert_same_size(n_rows, n_cols, p.get_n_rows(), p.get_n_cols(), "element-wise multiplication");
+  
+  typename SpProxy<T1>::const_iterator_type it     = p.begin();
+  typename SpProxy<T1>::const_iterator_type it_end = p.end();
+  
+  // We have to zero everything that isn't being used.
+  arrayops::inplace_set(memptr(), eT(0), (it.col() * n_rows) + it.row());
+  
+  while(it != it_end)
+    {
+    const uword cur_loc = (it.col() * n_rows) + it.row();
+    
+    access::rw(mem[cur_loc]) *= (*it);
+    
+    ++it;
+    
+    const uword next_loc = (it == it_end)
+      ? (p.get_n_cols() * n_rows)
+      : (it.col() * n_rows) + it.row();
+    
+    arrayops::inplace_set(memptr() + cur_loc + 1, eT(0), (next_loc - cur_loc - 1));
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const SpBase<eT, T1>& m)
+  {
+  arma_extra_debug_sigprint();
+  
+  const SpProxy<T1> p(m.get_ref());
+  
+  arma_debug_assert_same_size(n_rows, n_cols, p.get_n_rows(), p.get_n_cols(), "element-wise division");
+  
+  // If you use this method, you are probably stupid or misguided, but for completeness it is implemented.
+  // Unfortunately the best way to do this is loop over every element.
+  for(uword c = 0; c < n_cols; ++c)
+  for(uword r = 0; r < n_rows; ++r)
+    {
+    at(r, c) /= p.at(r, c);
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+mat_injector< Mat<eT> >
+Mat<eT>::operator<<(const eT val)
+  {
+  return mat_injector< Mat<eT> >(*this, val);
+  }
+
+
+
+template<typename eT>
+inline
+mat_injector< Mat<eT> >
+Mat<eT>::operator<<(const injector_end_of_row<>& x)
+  {
+  return mat_injector< Mat<eT> >(*this, x);
+  }
+
+
+
+//! creation of subview (row vector)
+template<typename eT>
+arma_inline
+subview_row<eT>
+Mat<eT>::row(const uword row_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( row_num >= n_rows, "Mat::row(): index out of bounds" );
+  
+  return subview_row<eT>(*this, row_num);
+  }
+
+
+
+//! creation of subview (row vector)
+template<typename eT>
+arma_inline
+const subview_row<eT>
+Mat<eT>::row(const uword row_num) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( row_num >= n_rows, "Mat::row(): index out of bounds" );
+  
+  return subview_row<eT>(*this, row_num);
+  }
+
+
+
+template<typename eT>
+inline
+subview_row<eT>
+Mat<eT>::operator()(const uword row_num, const span& col_span)
+  {
+  arma_extra_debug_sigprint();
+  
+  const bool col_all = col_span.whole;
+  
+  const uword local_n_cols = n_cols;
+  
+  const uword in_col1       = col_all ? 0            : col_span.a;
+  const uword in_col2       =                          col_span.b;
+  const uword submat_n_cols = col_all ? local_n_cols : in_col2 - in_col1 + 1;
+  
+  arma_debug_check
+    (
+    (row_num >= n_rows)
+    ||
+    ( col_all ? false : ((in_col1 > in_col2) || (in_col2 >= local_n_cols)) )
+    ,
+    "Mat::operator(): indices out of bounds or incorrectly used"
+    );
+  
+  return subview_row<eT>(*this, row_num, in_col1, submat_n_cols);
+  }
+
+
+
+template<typename eT>
+inline
+const subview_row<eT>
+Mat<eT>::operator()(const uword row_num, const span& col_span) const
+  {
+  arma_extra_debug_sigprint();
+  
+  const bool col_all = col_span.whole;
+  
+  const uword local_n_cols = n_cols;
+  
+  const uword in_col1       = col_all ? 0            : col_span.a;
+  const uword in_col2       =                          col_span.b;
+  const uword submat_n_cols = col_all ? local_n_cols : in_col2 - in_col1 + 1;
+  
+  arma_debug_check
+    (
+    (row_num >= n_rows)
+    ||
+    ( col_all ? false : ((in_col1 > in_col2) || (in_col2 >= local_n_cols)) )
+    ,
+    "Mat::operator(): indices out of bounds or incorrectly used"
+    );
+  
+  return subview_row<eT>(*this, row_num, in_col1, submat_n_cols);
+  }
+
+
+
+//! creation of subview (column vector)
+template<typename eT>
+arma_inline
+subview_col<eT>
+Mat<eT>::col(const uword col_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( col_num >= n_cols, "Mat::col(): index out of bounds");
+  
+  return subview_col<eT>(*this, col_num);
+  }
+
+
+
+//! creation of subview (column vector)
+template<typename eT>
+arma_inline
+const subview_col<eT>
+Mat<eT>::col(const uword col_num) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( col_num >= n_cols, "Mat::col(): index out of bounds");
+  
+  return subview_col<eT>(*this, col_num);
+  }
+
+
+
+template<typename eT>
+inline
+subview_col<eT>
+Mat<eT>::operator()(const span& row_span, const uword col_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  const bool row_all = row_span.whole;
+  
+  const uword local_n_rows = n_rows;
+  
+  const uword in_row1       = row_all ? 0            : row_span.a;
+  const uword in_row2       =                          row_span.b;
+  const uword submat_n_rows = row_all ? local_n_rows : in_row2 - in_row1 + 1;
+  
+  arma_debug_check
+    (
+    (col_num >= n_cols)
+    ||
+    ( row_all ? false : ((in_row1 > in_row2) || (in_row2 >= local_n_rows)) )
+    ,
+    "Mat::operator(): indices out of bounds or incorrectly used"
+    );
+  
+  return subview_col<eT>(*this, col_num, in_row1, submat_n_rows);
+  }
+
+
+
+template<typename eT>
+inline
+const subview_col<eT>
+Mat<eT>::operator()(const span& row_span, const uword col_num) const
+  {
+  arma_extra_debug_sigprint();
+  
+  const bool row_all = row_span.whole;
+  
+  const uword local_n_rows = n_rows;
+  
+  const uword in_row1       = row_all ? 0            : row_span.a;
+  const uword in_row2       =                          row_span.b;
+  const uword submat_n_rows = row_all ? local_n_rows : in_row2 - in_row1 + 1;
+  
+  arma_debug_check
+    (
+    (col_num >= n_cols)
+    ||
+    ( row_all ? false : ((in_row1 > in_row2) || (in_row2 >= local_n_rows)) )
+    ,
+    "Mat::operator(): indices out of bounds or incorrectly used"
+    );
+  
+  return subview_col<eT>(*this, col_num, in_row1, submat_n_rows);
+  }
+
+
+
+//! create a Col object which uses memory from an existing matrix object.
+//! this approach is currently not alias safe
+//! and does not take into account that the parent matrix object could be deleted.
+//! if deleted memory is accessed by the created Col object,
+//! it will cause memory corruption and/or a crash
+template<typename eT>
+inline
+Col<eT>
+Mat<eT>::unsafe_col(const uword col_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( col_num >= n_cols, "Mat::unsafe_col(): index out of bounds");
+  
+  return Col<eT>(colptr(col_num), n_rows, false, true);
+  }
+
+
+
+//! create a Col object which uses memory from an existing matrix object.
+//! this approach is currently not alias safe
+//! and does not take into account that the parent matrix object could be deleted.
+//! if deleted memory is accessed by the created Col object,
+//! it will cause memory corruption and/or a crash
+template<typename eT>
+inline
+const Col<eT>
+Mat<eT>::unsafe_col(const uword col_num) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( col_num >= n_cols, "Mat::unsafe_col(): index out of bounds");
+  
+  typedef const Col<eT> out_type;
+  
+  return out_type(const_cast<eT*>(colptr(col_num)), n_rows, false, true);
+  }
+
+
+
+//! creation of subview (submatrix comprised of specified row vectors)
+template<typename eT>
+arma_inline
+subview<eT>
+Mat<eT>::rows(const uword in_row1, const uword in_row2)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check
+    (
+    (in_row1 > in_row2) || (in_row2 >= n_rows),
+    "Mat::rows(): indices out of bounds or incorrectly used"
+    );
+  
+  const uword subview_n_rows = in_row2 - in_row1 + 1;
+  
+  return subview<eT>(*this, in_row1, 0, subview_n_rows, n_cols );
+  }
+
+
+
+//! creation of subview (submatrix comprised of specified row vectors)
+template<typename eT>
+arma_inline
+const subview<eT>
+Mat<eT>::rows(const uword in_row1, const uword in_row2) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check
+    (
+    (in_row1 > in_row2) || (in_row2 >= n_rows),
+    "Mat::rows(): indices out of bounds or incorrectly used"
+    );
+  
+  const uword subview_n_rows = in_row2 - in_row1 + 1;
+  
+  return subview<eT>(*this, in_row1, 0, subview_n_rows, n_cols );
+  }
+
+
+
+//! creation of subview (submatrix comprised of specified column vectors)
+template<typename eT>
+arma_inline
+subview<eT>
+Mat<eT>::cols(const uword in_col1, const uword in_col2)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check
+    (
+    (in_col1 > in_col2) || (in_col2 >= n_cols),
+    "Mat::cols(): indices out of bounds or incorrectly used"
+    );
+  
+  const uword subview_n_cols = in_col2 - in_col1 + 1;
+  
+  return subview<eT>(*this, 0, in_col1, n_rows, subview_n_cols);
+  }
+
+
+
+//! creation of subview (submatrix comprised of specified column vectors)
+template<typename eT>
+arma_inline
+const subview<eT>
+Mat<eT>::cols(const uword in_col1, const uword in_col2) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check
+    (
+    (in_col1 > in_col2) || (in_col2 >= n_cols),
+    "Mat::cols(): indices out of bounds or incorrectly used"
+    );
+  
+  const uword subview_n_cols = in_col2 - in_col1 + 1;
+  
+  return subview<eT>(*this, 0, in_col1, n_rows, subview_n_cols);
+  }
+
+
+
+//! creation of subview (submatrix)
+template<typename eT>
+arma_inline
+subview<eT>
+Mat<eT>::submat(const uword in_row1, const uword in_col1, const uword in_row2, const uword in_col2)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check
+    (
+    (in_row1 > in_row2) || (in_col1 >  in_col2) || (in_row2 >= n_rows) || (in_col2 >= n_cols),
+    "Mat::submat(): indices out of bounds or incorrectly used"
+    );
+  
+  const uword subview_n_rows = in_row2 - in_row1 + 1;
+  const uword subview_n_cols = in_col2 - in_col1 + 1;
+  
+  return subview<eT>(*this, in_row1, in_col1, subview_n_rows, subview_n_cols);
+  }
+
+
+
+//! creation of subview (generic submatrix)
+template<typename eT>
+arma_inline
+const subview<eT>
+Mat<eT>::submat(const uword in_row1, const uword in_col1, const uword in_row2, const uword in_col2) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check
+    (
+    (in_row1 > in_row2) || (in_col1 >  in_col2) || (in_row2 >= n_rows) || (in_col2 >= n_cols),
+    "Mat::submat(): indices out of bounds or incorrectly used"
+    );
+    
+  const uword subview_n_rows = in_row2 - in_row1 + 1;
+  const uword subview_n_cols = in_col2 - in_col1 + 1;
+  
+  return subview<eT>(*this, in_row1, in_col1, subview_n_rows, subview_n_cols);
+  }
+
+
+
+//! creation of subview (submatrix)
+template<typename eT>
+inline
+subview<eT>
+Mat<eT>::submat(const span& row_span, const span& col_span)
+  {
+  arma_extra_debug_sigprint();
+  
+  const bool row_all = row_span.whole;
+  const bool col_all = col_span.whole;
+  
+  const uword local_n_rows = n_rows;
+  const uword local_n_cols = n_cols;
+  
+  const uword in_row1       = row_all ? 0            : row_span.a;
+  const uword in_row2       =                          row_span.b;
+  const uword submat_n_rows = row_all ? local_n_rows : in_row2 - in_row1 + 1;
+  
+  const uword in_col1       = col_all ? 0            : col_span.a;
+  const uword in_col2       =                          col_span.b;
+  const uword submat_n_cols = col_all ? local_n_cols : in_col2 - in_col1 + 1;
+  
+  arma_debug_check
+    (
+    ( row_all ? false : ((in_row1 > in_row2) || (in_row2 >= local_n_rows)) )
+    ||
+    ( col_all ? false : ((in_col1 > in_col2) || (in_col2 >= local_n_cols)) )
+    ,
+    "Mat::submat(): indices out of bounds or incorrectly used"
+    );
+  
+  return subview<eT>(*this, in_row1, in_col1, submat_n_rows, submat_n_cols);
+  }
+
+
+
+//! creation of subview (generic submatrix)
+template<typename eT>
+inline
+const subview<eT>
+Mat<eT>::submat(const span& row_span, const span& col_span) const
+  {
+  arma_extra_debug_sigprint();
+  
+  const bool row_all = row_span.whole;
+  const bool col_all = col_span.whole;
+  
+  const uword local_n_rows = n_rows;
+  const uword local_n_cols = n_cols;
+  
+  const uword in_row1       = row_all ? 0            : row_span.a;
+  const uword in_row2       =                          row_span.b;
+  const uword submat_n_rows = row_all ? local_n_rows : in_row2 - in_row1 + 1;
+  
+  const uword in_col1       = col_all ? 0            : col_span.a;
+  const uword in_col2       =                          col_span.b;
+  const uword submat_n_cols = col_all ? local_n_cols : in_col2 - in_col1 + 1;
+  
+  arma_debug_check
+    (
+    ( row_all ? false : ((in_row1 > in_row2) || (in_row2 >= local_n_rows)) )
+    ||
+    ( col_all ? false : ((in_col1 > in_col2) || (in_col2 >= local_n_cols)) )
+    ,
+    "Mat::submat(): indices out of bounds or incorrectly used"
+    );
+  
+  return subview<eT>(*this, in_row1, in_col1, submat_n_rows, submat_n_cols);
+  }
+
+
+
+template<typename eT>
+inline
+subview<eT>
+Mat<eT>::operator()(const span& row_span, const span& col_span)
+  {
+  arma_extra_debug_sigprint();
+  
+  return (*this).submat(row_span, col_span);
+  }
+
+
+
+template<typename eT>
+inline
+const subview<eT>
+Mat<eT>::operator()(const span& row_span, const span& col_span) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return (*this).submat(row_span, col_span);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+arma_inline
+subview_elem1<eT,T1>
+Mat<eT>::elem(const Base<uword,T1>& a)
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem1<eT,T1>(*this, a);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+arma_inline
+const subview_elem1<eT,T1>
+Mat<eT>::elem(const Base<uword,T1>& a) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem1<eT,T1>(*this, a);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+arma_inline
+subview_elem1<eT,T1>
+Mat<eT>::operator()(const Base<uword,T1>& a)
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem1<eT,T1>(*this, a);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+arma_inline
+const subview_elem1<eT,T1>
+Mat<eT>::operator()(const Base<uword,T1>& a) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem1<eT,T1>(*this, a);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+arma_inline
+subview_elem2<eT,T1,T2>
+Mat<eT>::elem(const Base<uword,T1>& ri, const Base<uword,T2>& ci)
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T1,T2>(*this, ri, ci, false, false);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+arma_inline
+const subview_elem2<eT,T1,T2>
+Mat<eT>::elem(const Base<uword,T1>& ri, const Base<uword,T2>& ci) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T1,T2>(*this, ri, ci, false, false);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+arma_inline
+subview_elem2<eT,T1,T2>
+Mat<eT>::submat(const Base<uword,T1>& ri, const Base<uword,T2>& ci)
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T1,T2>(*this, ri, ci, false, false);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+arma_inline
+const subview_elem2<eT,T1,T2>
+Mat<eT>::submat(const Base<uword,T1>& ri, const Base<uword,T2>& ci) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T1,T2>(*this, ri, ci, false, false);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+arma_inline
+subview_elem2<eT,T1,T2>
+Mat<eT>::operator()(const Base<uword,T1>& ri, const Base<uword,T2>& ci)
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T1,T2>(*this, ri, ci, false, false);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+arma_inline
+const subview_elem2<eT,T1,T2>
+Mat<eT>::operator()(const Base<uword,T1>& ri, const Base<uword,T2>& ci) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T1,T2>(*this, ri, ci, false, false);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+arma_inline
+subview_elem2<eT,T1,T1>
+Mat<eT>::rows(const Base<uword,T1>& ri)
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T1,T1>(*this, ri, ri, false, true);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+arma_inline
+const subview_elem2<eT,T1,T1>
+Mat<eT>::rows(const Base<uword,T1>& ri) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T1,T1>(*this, ri, ri, false, true);
+  }
+
+
+
+template<typename eT>
+template<typename T2>
+arma_inline
+subview_elem2<eT,T2,T2>
+Mat<eT>::cols(const Base<uword,T2>& ci)
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T2,T2>(*this, ci, ci, true, false);
+  }
+
+
+
+template<typename eT>
+template<typename T2>
+arma_inline
+const subview_elem2<eT,T2,T2>
+Mat<eT>::cols(const Base<uword,T2>& ci) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_elem2<eT,T2,T2>(*this, ci, ci, true, false);
+  }
+
+
+
+template<typename eT>
+arma_inline
+subview_each1< Mat<eT>, 0 >
+Mat<eT>::each_col()
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_each1< Mat<eT>, 0>(*this);
+  }
+
+
+
+template<typename eT>
+arma_inline
+subview_each1< Mat<eT>, 1 >
+Mat<eT>::each_row()
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_each1< Mat<eT>, 1>(*this);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+subview_each2< Mat<eT>, 0, T1 >
+Mat<eT>::each_col(const Base<uword, T1>& indices)
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_each2< Mat<eT>, 0, T1 >(*this, indices);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+subview_each2< Mat<eT>, 1, T1 >
+Mat<eT>::each_row(const Base<uword, T1>& indices)
+  {
+  arma_extra_debug_sigprint();
+  
+  return subview_each2< Mat<eT>, 1, T1 >(*this, indices);
+  }
+
+
+
+//! creation of diagview (diagonal)
+template<typename eT>
+arma_inline
+diagview<eT>
+Mat<eT>::diag(const sword in_id)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword row_offset = (in_id < 0) ? uword(-in_id) : 0;
+  const uword col_offset = (in_id > 0) ? uword( in_id) : 0;
+  
+  arma_debug_check
+    (
+    ((row_offset > 0) && (row_offset >= n_rows)) || ((col_offset > 0) && (col_offset >= n_cols)),
+    "Mat::diag(): requested diagonal out of bounds"
+    );
+  
+  const uword len = (std::min)(n_rows - row_offset, n_cols - col_offset);
+  
+  return diagview<eT>(*this, row_offset, col_offset, len);
+  }
+
+
+
+//! creation of diagview (diagonal)
+template<typename eT>
+arma_inline
+const diagview<eT>
+Mat<eT>::diag(const sword in_id) const
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword row_offset = (in_id < 0) ? -in_id : 0;
+  const uword col_offset = (in_id > 0) ?  in_id : 0;
+  
+  arma_debug_check
+    (
+    ((row_offset > 0) && (row_offset >= n_rows)) || ((col_offset > 0) && (col_offset >= n_cols)),
+    "Mat::diag(): requested diagonal out of bounds"
+    );
+  
+  const uword len = (std::min)(n_rows - row_offset, n_cols - col_offset);
+  
+  return diagview<eT>(*this, row_offset, col_offset, len);
+  }
+
+
+
+template<typename eT>
+inline
+void
+Mat<eT>::swap_rows(const uword in_row1, const uword in_row2)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword local_n_rows = n_rows;
+  const uword local_n_cols = n_cols;
+  
+  arma_debug_check
+    (
+    (in_row1 >= local_n_rows) || (in_row2 >= local_n_rows),
+    "Mat::swap_rows(): index out of bounds"
+    );
+  
+  if(n_elem > 0)
+    {
+    for(uword ucol=0; ucol < local_n_cols; ++ucol)
+      {
+      const uword offset = ucol * local_n_rows;
+      const uword pos1   = in_row1 + offset;
+      const uword pos2   = in_row2 + offset;
+      
+      std::swap( access::rw(mem[pos1]), access::rw(mem[pos2]) );
+      }
+    }
+  }
+
+
+
+template<typename eT>
+inline
+void
+Mat<eT>::swap_cols(const uword in_colA, const uword in_colB)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword local_n_rows = n_rows;
+  const uword local_n_cols = n_cols;
+  
+  arma_debug_check
+    (
+    (in_colA >= local_n_cols) || (in_colB >= local_n_cols),
+    "Mat::swap_cols(): index out of bounds"
+    );
+  
+  if(n_elem > 0)
+    {
+    eT* ptrA = colptr(in_colA);
+    eT* ptrB = colptr(in_colB);
+    
+    eT tmp_i;
+    eT tmp_j;
+    
+    uword iq,jq;
+    for(iq=0, jq=1; jq < local_n_rows; iq+=2, jq+=2)
+      {
+      tmp_i = ptrA[iq];
+      tmp_j = ptrA[jq];
+      
+      ptrA[iq] = ptrB[iq];
+      ptrA[jq] = ptrB[jq];
+      
+      ptrB[iq] = tmp_i;
+      ptrB[jq] = tmp_j;
+      }
+    
+    if(iq < local_n_rows)
+      {
+      std::swap( ptrA[iq], ptrB[iq] );
+      }
+    }
+  }
+
+
+
+//! remove specified row
+template<typename eT>
+inline
+void
+Mat<eT>::shed_row(const uword row_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( row_num >= n_rows, "Mat::shed_row(): index out of bounds");
+  
+  shed_rows(row_num, row_num);
+  }
+
+
+
+//! remove specified column
+template<typename eT>
+inline
+void
+Mat<eT>::shed_col(const uword col_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( col_num >= n_cols, "Mat::shed_col(): index out of bounds");
+  
+  shed_cols(col_num, col_num);
+  }
+
+
+
+//! remove specified rows
+template<typename eT>
+inline
+void
+Mat<eT>::shed_rows(const uword in_row1, const uword in_row2)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check
+    (
+    (in_row1 > in_row2) || (in_row2 >= n_rows),
+    "Mat::shed_rows(): indices out of bounds or incorrectly used"
+    );
+  
+  const uword n_keep_front = in_row1;
+  const uword n_keep_back  = n_rows - (in_row2 + 1);
+  
+  Mat<eT> X(n_keep_front + n_keep_back, n_cols);
+  
+  if(n_keep_front > 0)
+    {
+    X.rows( 0, (n_keep_front-1) ) = rows( 0, (in_row1-1) );
+    }
+  
+  if(n_keep_back > 0)
+    {
+    X.rows( n_keep_front,  (n_keep_front+n_keep_back-1) ) = rows( (in_row2+1), (n_rows-1) );
+    }
+  
+  steal_mem(X);
+  }
+
+
+
+//! remove specified columns
+template<typename eT>
+inline
+void
+Mat<eT>::shed_cols(const uword in_col1, const uword in_col2)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check
+    (
+    (in_col1 > in_col2) || (in_col2 >= n_cols),
+    "Mat::shed_cols(): indices out of bounds or incorrectly used"
+    );
+  
+  const uword n_keep_front = in_col1;
+  const uword n_keep_back  = n_cols - (in_col2 + 1);
+  
+  Mat<eT> X(n_rows, n_keep_front + n_keep_back);
+  
+  if(n_keep_front > 0)
+    {
+    X.cols( 0, (n_keep_front-1) ) = cols( 0, (in_col1-1) );
+    }
+  
+  if(n_keep_back > 0)
+    {
+    X.cols( n_keep_front,  (n_keep_front+n_keep_back-1) ) = cols( (in_col2+1), (n_cols-1) );
+    }
+  
+  steal_mem(X);
+  }
+
+
+
+//! insert N rows at the specified row position,
+//! optionally setting the elements of the inserted rows to zero
+template<typename eT>
+inline
+void
+Mat<eT>::insert_rows(const uword row_num, const uword N, const bool set_to_zero)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword t_n_rows = n_rows;
+  const uword t_n_cols = n_cols;
+  
+  const uword A_n_rows = row_num;
+  const uword B_n_rows = t_n_rows - row_num;
+  
+  // insertion at row_num == n_rows is in effect an append operation
+  arma_debug_check( (row_num > t_n_rows), "Mat::insert_rows(): index out of bounds");
+  
+  if(N > 0)
+    {
+    Mat<eT> out(t_n_rows + N, t_n_cols);
+    
+    if(A_n_rows > 0)
+      {
+      out.rows(0, A_n_rows-1) = rows(0, A_n_rows-1);
+      }
+    
+    if(B_n_rows > 0)
+      {
+      out.rows(row_num + N, t_n_rows + N - 1) = rows(row_num, t_n_rows-1);
+      }
+    
+    if(set_to_zero == true)
+      {
+      out.rows(row_num, row_num + N - 1).zeros();
+      }
+    
+    steal_mem(out);
+    }
+  }
+
+
+
+//! insert N columns at the specified column position,
+//! optionally setting the elements of the inserted columns to zero
+template<typename eT>
+inline
+void
+Mat<eT>::insert_cols(const uword col_num, const uword N, const bool set_to_zero)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword t_n_rows = n_rows;
+  const uword t_n_cols = n_cols;
+  
+  const uword A_n_cols = col_num;
+  const uword B_n_cols = t_n_cols - col_num;
+  
+  // insertion at col_num == n_cols is in effect an append operation
+  arma_debug_check( (col_num > t_n_cols), "Mat::insert_cols(): index out of bounds");
+  
+  if(N > 0)
+    {
+    Mat<eT> out(t_n_rows, t_n_cols + N);
+    
+    if(A_n_cols > 0)
+      {
+      out.cols(0, A_n_cols-1) = cols(0, A_n_cols-1);
+      }
+    
+    if(B_n_cols > 0)
+      {
+      out.cols(col_num + N, t_n_cols + N - 1) = cols(col_num, t_n_cols-1);
+      }
+    
+    if(set_to_zero == true)
+      {
+      out.cols(col_num, col_num + N - 1).zeros();
+      }
+    
+    steal_mem(out);
+    }
+  }
+
+
+
+//! insert the given object at the specified row position; 
+//! the given object must have the same number of columns as the matrix
+template<typename eT>
+template<typename T1>
+inline
+void
+Mat<eT>::insert_rows(const uword row_num, const Base<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const unwrap<T1>   tmp(X.get_ref());
+  const Mat<eT>& C = tmp.M;
+  
+  const uword C_n_rows = C.n_rows;
+  const uword C_n_cols = C.n_cols;
+  
+  const uword t_n_rows = n_rows;
+  const uword t_n_cols = n_cols;
+  
+  const uword A_n_rows = row_num;
+  const uword B_n_rows = t_n_rows - row_num;
+  
+  bool  err_state = false;
+  char* err_msg   = 0;
+  
+  // insertion at row_num == n_rows is in effect an append operation
+  
+  arma_debug_set_error
+    (
+    err_state,
+    err_msg,
+    (row_num > t_n_rows),
+    "Mat::insert_rows(): index out of bounds"
+    );
+  
+  arma_debug_set_error
+    (
+    err_state,
+    err_msg,
+    ( (C_n_cols != t_n_cols) && ( (t_n_rows > 0) || (t_n_cols > 0) ) && ( (C_n_rows > 0) || (C_n_cols > 0) ) ),
+    "Mat::insert_rows(): given object has an incompatible number of columns"
+    );
+  
+  arma_debug_check(err_state, err_msg);
+  
+  if(C_n_rows > 0)
+    {
+    Mat<eT> out( t_n_rows + C_n_rows, (std::max)(t_n_cols, C_n_cols) );
+    
+    if(t_n_cols > 0)
+      {
+      if(A_n_rows > 0)
+        {
+        out.rows(0, A_n_rows-1) = rows(0, A_n_rows-1);
+        }
+      
+      if( (t_n_cols > 0) && (B_n_rows > 0) )
+        {
+        out.rows(row_num + C_n_rows, t_n_rows + C_n_rows - 1) = rows(row_num, t_n_rows - 1);
+        }
+      }
+    
+    if(C_n_cols > 0)
+      {
+      out.rows(row_num, row_num + C_n_rows - 1) = C;
+      }
+    
+    steal_mem(out);
+    }
+  }
+
+
+
+//! insert the given object at the specified column position; 
+//! the given object must have the same number of rows as the matrix
+template<typename eT>
+template<typename T1>
+inline
+void
+Mat<eT>::insert_cols(const uword col_num, const Base<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const unwrap<T1>   tmp(X.get_ref());
+  const Mat<eT>& C = tmp.M;
+  
+  const uword C_n_rows = C.n_rows;
+  const uword C_n_cols = C.n_cols;
+  
+  const uword t_n_rows = n_rows;
+  const uword t_n_cols = n_cols;
+  
+  const uword A_n_cols = col_num;
+  const uword B_n_cols = t_n_cols - col_num;
+  
+  bool  err_state = false;
+  char* err_msg   = 0;
+  
+  // insertion at col_num == n_cols is in effect an append operation
+  
+  arma_debug_set_error
+    (
+    err_state,
+    err_msg,
+    (col_num > t_n_cols),
+    "Mat::insert_cols(): index out of bounds"
+    );
+  
+  arma_debug_set_error
+    (
+    err_state,
+    err_msg,
+    ( (C_n_rows != t_n_rows) && ( (t_n_rows > 0) || (t_n_cols > 0) ) && ( (C_n_rows > 0) || (C_n_cols > 0) ) ),
+    "Mat::insert_cols(): given object has an incompatible number of rows"
+    );
+  
+  arma_debug_check(err_state, err_msg);
+  
+  if(C_n_cols > 0)
+    {
+    Mat<eT> out( (std::max)(t_n_rows, C_n_rows), t_n_cols + C_n_cols );
+    
+    if(t_n_rows > 0)
+      {
+      if(A_n_cols > 0)
+        {
+        out.cols(0, A_n_cols-1) = cols(0, A_n_cols-1);
+        }
+      
+      if(B_n_cols > 0)
+        {
+        out.cols(col_num + C_n_cols, t_n_cols + C_n_cols - 1) = cols(col_num, t_n_cols - 1);
+        }
+      }
+    
+    if(C_n_rows > 0)
+      {
+      out.cols(col_num, col_num + C_n_cols - 1) = C;
+      }
+    
+    steal_mem(out);
+    }
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename gen_type>
+inline
+Mat<eT>::Mat(const Gen<T1, gen_type>& X)
+  : n_rows(X.n_rows)
+  , n_cols(X.n_cols)
+  , n_elem(n_rows*n_cols)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  init_cold();
+  
+  X.apply(*this);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename gen_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const Gen<T1, gen_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  init_warm(X.n_rows, X.n_cols);
+  
+  X.apply(*this);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename gen_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const Gen<T1, gen_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  X.apply_inplace_plus(*this);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename gen_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const Gen<T1, gen_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  X.apply_inplace_minus(*this);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename gen_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const Gen<T1, gen_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  const Mat<eT> tmp(X);
+  
+  return (*this).operator*=(tmp);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename gen_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const Gen<T1, gen_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  X.apply_inplace_schur(*this);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename gen_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const Gen<T1, gen_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  X.apply_inplace_div(*this);
+  
+  return *this;
+  }
+
+
+
+//! create a matrix from Op, i.e. run the previously delayed unary operations
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+Mat<eT>::Mat(const Op<T1, op_type>& X)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  op_type::apply(*this, X);
+  }
+
+
+
+//! create a matrix from Op, i.e. run the previously delayed unary operations
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const Op<T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  op_type::apply(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix addition, with the right-hand-side operand having delayed operations
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const Op<T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator+=(m);
+  }
+
+
+
+//! in-place matrix subtraction, with the right-hand-side operand having delayed operations
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const Op<T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator-=(m);
+  }
+
+
+
+//! in-place matrix multiplication, with the right-hand-side operand having delayed operations
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const Op<T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  glue_times::apply_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix element-wise multiplication, with the right-hand-side operand having delayed operations
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const Op<T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator%=(m);
+  }
+
+
+
+//! in-place matrix element-wise division, with the right-hand-side operand having delayed operations
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const Op<T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator/=(m);
+  }
+
+
+
+//! create a matrix from eOp, i.e. run the previously delayed unary operations
+template<typename eT>
+template<typename T1, typename eop_type>
+inline
+Mat<eT>::Mat(const eOp<T1, eop_type>& X)
+  : n_rows(X.get_n_rows())
+  , n_cols(X.get_n_cols())
+  , n_elem(X.get_n_elem())
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  init_cold();
+  
+  eop_type::apply(*this, X);
+  }
+
+
+
+//! create a matrix from eOp, i.e. run the previously delayed unary operations
+template<typename eT>
+template<typename T1, typename eop_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const eOp<T1, eop_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  const bool bad_alias = (eOp<T1, eop_type>::proxy_type::has_subview  &&  X.P.is_alias(*this));
+  
+  if(bad_alias == false)
+    {
+    init_warm(X.get_n_rows(), X.get_n_cols());
+    
+    eop_type::apply(*this, X);
+    }
+  else
+    {
+    arma_extra_debug_print("bad_alias = true");
+    
+    Mat<eT> tmp(X);
+    
+    steal_mem(tmp);
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename eop_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const eOp<T1, eop_type>& X)
+  {
+  arma_extra_debug_sigprint();
+
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  eop_type::apply_inplace_plus(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename eop_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const eOp<T1, eop_type>& X)
+  {
+  arma_extra_debug_sigprint();
+
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  eop_type::apply_inplace_minus(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename eop_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const eOp<T1, eop_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  glue_times::apply_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename eop_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const eOp<T1, eop_type>& X)
+  {
+  arma_extra_debug_sigprint();
+
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  eop_type::apply_inplace_schur(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename eop_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const eOp<T1, eop_type>& X)
+  {
+  arma_extra_debug_sigprint();
+
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  
+  eop_type::apply_inplace_div(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! EXPERIMENTAL
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+Mat<eT>::Mat(const mtOp<eT, T1, op_type>& X)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  op_type::apply(*this, X);
+  }
+
+
+
+//! EXPERIMENTAL
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const mtOp<eT, T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  op_type::apply(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! EXPERIMENTAL
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const mtOp<eT, T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator+=(m);
+  }
+
+
+
+//! EXPERIMENTAL
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const mtOp<eT, T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator-=(m);
+  }
+
+
+
+//! EXPERIMENTAL
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const mtOp<eT, T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator*=(m);
+  }
+
+
+
+//! EXPERIMENTAL
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const mtOp<eT, T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator%=(m);
+  }
+
+
+
+//! EXPERIMENTAL
+template<typename eT>
+template<typename T1, typename op_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const mtOp<eT, T1, op_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator/=(m);
+  }
+
+
+
+//! create a matrix from Glue, i.e. run the previously delayed binary operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+Mat<eT>::Mat(const Glue<T1, T2, glue_type>& X)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  glue_type::apply(*this, X);
+  }
+
+
+
+//! create a matrix from Glue, i.e. run the previously delayed binary operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const Glue<T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  glue_type::apply(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix addition, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const Glue<T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator+=(m);
+  }
+
+
+
+//! in-place matrix subtraction, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const Glue<T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator-=(m);
+  }
+
+
+
+//! in-place matrix multiplications, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const Glue<T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  glue_times::apply_inplace(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix element-wise multiplication, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const Glue<T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator%=(m);
+  }
+
+
+
+//! in-place matrix element-wise division, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const Glue<T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator/=(m);
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const Glue<T1, T2, glue_times>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  glue_times::apply_inplace_plus(*this, X, sword(+1));
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const Glue<T1, T2, glue_times>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  glue_times::apply_inplace_plus(*this, X, sword(-1));
+  
+  return *this;
+  }
+
+
+
+//! create a matrix from eGlue, i.e. run the previously delayed binary operations
+template<typename eT>
+template<typename T1, typename T2, typename eglue_type>
+inline
+Mat<eT>::Mat(const eGlue<T1, T2, eglue_type>& X)
+  : n_rows(X.get_n_rows())
+  , n_cols(X.get_n_cols())
+  , n_elem(X.get_n_elem())
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  init_cold();
+  
+  eglue_type::apply(*this, X);
+  }
+
+
+
+//! create a matrix from eGlue, i.e. run the previously delayed binary operations
+template<typename eT>
+template<typename T1, typename T2, typename eglue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const eGlue<T1, T2, eglue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  const bool bad_alias =
+    (
+    (eGlue<T1, T2, eglue_type>::proxy1_type::has_subview  &&  X.P1.is_alias(*this))
+    ||
+    (eGlue<T1, T2, eglue_type>::proxy2_type::has_subview  &&  X.P2.is_alias(*this))
+    );
+  
+  if(bad_alias == false)
+    {
+    init_warm(X.get_n_rows(), X.get_n_cols());
+    
+    eglue_type::apply(*this, X);
+    }
+  else
+    {
+    arma_extra_debug_print("bad_alias = true");
+    
+    Mat<eT> tmp(X);
+    
+    steal_mem(tmp);
+    }
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix addition, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename eglue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const eGlue<T1, T2, eglue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  eglue_type::apply_inplace_plus(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! in-place matrix subtraction, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename eglue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const eGlue<T1, T2, eglue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  eglue_type::apply_inplace_minus(*this, X);
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2, typename eglue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const eGlue<T1, T2, eglue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  glue_times::apply_inplace(*this, X);
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2, typename eglue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const eGlue<T1, T2, eglue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  eglue_type::apply_inplace_schur(*this, X);
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<typename T1, typename T2, typename eglue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const eGlue<T1, T2, eglue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_type_check(( is_same_type< eT, typename T1::elem_type >::value == false ));
+  arma_type_check(( is_same_type< eT, typename T2::elem_type >::value == false ));
+  
+  eglue_type::apply_inplace_div(*this, X);
+  return *this;
+  }
+
+
+
+//! EXPERIMENTAL: create a matrix from mtGlue, i.e. run the previously delayed binary operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+Mat<eT>::Mat(const mtGlue<eT, T1, T2, glue_type>& X)
+  : n_rows(0)
+  , n_cols(0)
+  , n_elem(0)
+  , vec_state(0)
+  , mem_state(0)
+  , mem()
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  glue_type::apply(*this, X);
+  }
+
+
+
+//! EXPERIMENTAL: create a matrix from Glue, i.e. run the previously delayed binary operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator=(const mtGlue<eT, T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  glue_type::apply(*this, X);
+  
+  return *this;
+  }
+
+
+
+//! EXPERIMENTAL: in-place matrix addition, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator+=(const mtGlue<eT, T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator+=(m);
+  }
+
+
+
+//! EXPERIMENTAL: in-place matrix subtraction, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator-=(const mtGlue<eT, T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator-=(m);
+  }
+
+
+
+//! EXPERIMENTAL: in-place matrix multiplications, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator*=(const mtGlue<eT, T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  glue_times::apply_inplace(*this, m);
+  
+  return *this;
+  }
+
+
+
+//! EXPERIMENTAL: in-place matrix element-wise multiplication, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator%=(const mtGlue<eT, T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator%=(m);
+  }
+
+
+
+//! EXPERIMENTAL: in-place matrix element-wise division, with the right-hand-side operands having delayed operations
+template<typename eT>
+template<typename T1, typename T2, typename glue_type>
+inline
+const Mat<eT>&
+Mat<eT>::operator/=(const mtGlue<eT, T1, T2, glue_type>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Mat<eT> m(X);
+  
+  return (*this).operator/=(m);
+  }
+
+
+
+//! linear element accessor (treats the matrix as a vector); no bounds check; assumes memory is aligned
+template<typename eT>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::at_alt(const uword ii) const
+  {
+  const eT* mem_aligned = mem;
+  memory::mark_as_aligned(mem_aligned);
+  
+  return mem_aligned[ii];
+  }
+
+
+
+//! linear element accessor (treats the matrix as a vector); bounds checking not done when ARMA_NO_DEBUG is defined
+template<typename eT>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::operator() (const uword ii)
+  {
+  arma_debug_check( (ii >= n_elem), "Mat::operator(): index out of bounds");
+  return access::rw(mem[ii]);
+  }
+
+
+
+//! linear element accessor (treats the matrix as a vector); bounds checking not done when ARMA_NO_DEBUG is defined
+template<typename eT>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::operator() (const uword ii) const
+  {
+  arma_debug_check( (ii >= n_elem), "Mat::operator(): index out of bounds");
+  return mem[ii];
+  }
+
+
+//! linear element accessor (treats the matrix as a vector); no bounds check.  
+template<typename eT>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::operator[] (const uword ii)
+  {
+  return access::rw(mem[ii]);
+  }
+
+
+
+//! linear element accessor (treats the matrix as a vector); no bounds check
+template<typename eT>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::operator[] (const uword ii) const
+  {
+  return mem[ii];
+  }
+
+
+
+//! linear element accessor (treats the matrix as a vector); no bounds check.  
+template<typename eT>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::at(const uword ii)
+  {
+  return access::rw(mem[ii]);
+  }
+
+
+
+//! linear element accessor (treats the matrix as a vector); no bounds check
+template<typename eT>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::at(const uword ii) const
+  {
+  return mem[ii];
+  }
+
+
+
+//! element accessor; bounds checking not done when ARMA_NO_DEBUG is defined
+template<typename eT>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::operator() (const uword in_row, const uword in_col)
+  {
+  arma_debug_check( ((in_row >= n_rows) || (in_col >= n_cols)), "Mat::operator(): index out of bounds");
+  return access::rw(mem[in_row + in_col*n_rows]);
+  }
+
+
+
+//! element accessor; bounds checking not done when ARMA_NO_DEBUG is defined
+template<typename eT>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::operator() (const uword in_row, const uword in_col) const
+  {
+  arma_debug_check( ((in_row >= n_rows) || (in_col >= n_cols)), "Mat::operator(): index out of bounds");
+  return mem[in_row + in_col*n_rows];
+  }
+
+
+
+//! element accessor; no bounds check
+template<typename eT>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::at(const uword in_row, const uword in_col)
+  {
+  return access::rw( mem[in_row + in_col*n_rows] );
+  }
+
+
+
+//! element accessor; no bounds check
+template<typename eT>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::at(const uword in_row, const uword in_col) const
+  {
+  return mem[in_row + in_col*n_rows];
+  }
+
+
+
+//! prefix ++
+template<typename eT>
+arma_inline
+const Mat<eT>&
+Mat<eT>::operator++()
+  {
+  Mat_aux::prefix_pp(*this);
+  return *this;
+  }
+
+
+
+//! postfix ++  (must not return the object by reference)
+template<typename eT>
+arma_inline
+void
+Mat<eT>::operator++(int)
+  {
+  Mat_aux::postfix_pp(*this);
+  }
+
+
+
+//! prefix --
+template<typename eT>
+arma_inline
+const Mat<eT>&
+Mat<eT>::operator--()
+  {
+  Mat_aux::prefix_mm(*this);
+  return *this;
+  }
+
+
+
+//! postfix --  (must not return the object by reference)
+template<typename eT>
+arma_inline
+void
+Mat<eT>::operator--(int)
+  {
+  Mat_aux::postfix_mm(*this);
+  }
+
+
+
+//! returns true if the matrix has no elements
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::is_empty() const
+  {
+  return (n_elem == 0);
+  }
+
+
+
+//! returns true if the object can be interpreted as a column or row vector
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::is_vec() const
+  {
+  return ( (n_rows == 1) || (n_cols == 1) );
+  }
+
+
+
+//! returns true if the object can be interpreted as a row vector
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::is_rowvec() const
+  {
+  return (n_rows == 1);
+  }
+
+
+
+//! returns true if the object can be interpreted as a column vector
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::is_colvec() const
+  {
+  return (n_cols == 1);
+  }
+
+
+
+//! returns true if the object has the same number of non-zero rows and columnns
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::is_square() const
+  {
+  return (n_rows == n_cols);
+  }
+
+
+
+//! returns true if all of the elements are finite
+template<typename eT>
+inline
+arma_warn_unused
+bool
+Mat<eT>::is_finite() const
+  {
+  return arrayops::is_finite( memptr(), n_elem );
+  }
+
+
+
+//! returns true if the given index is currently in range
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::in_range(const uword ii) const
+  {
+  return (ii < n_elem);
+  }
+
+
+
+//! returns true if the given start and end indices are currently in range
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::in_range(const span& x) const
+  {
+  arma_extra_debug_sigprint();
+  
+  if(x.whole == true)
+    {
+    return true;
+    }
+  else
+    {
+    const uword a = x.a;
+    const uword b = x.b;
+    
+    return ( (a <= b) && (b < n_elem) );
+    }
+  }
+
+
+
+//! returns true if the given location is currently in range
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::in_range(const uword in_row, const uword in_col) const
+  {
+  return ( (in_row < n_rows) && (in_col < n_cols) );
+  }
+
+
+
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::in_range(const span& row_span, const uword in_col) const
+  {
+  arma_extra_debug_sigprint();
+  
+  if(row_span.whole == true)
+    {
+    return (in_col < n_cols);
+    }
+  else
+    {
+    const uword in_row1 = row_span.a;
+    const uword in_row2 = row_span.b;
+    
+    return ( (in_row1 <= in_row2) && (in_row2 < n_rows) && (in_col < n_cols) );
+    }
+  }
+
+
+
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::in_range(const uword in_row, const span& col_span) const
+  {
+  arma_extra_debug_sigprint();
+  
+  if(col_span.whole == true)
+    {
+    return (in_row < n_rows);
+    }
+  else
+    {
+    const uword in_col1 = col_span.a;
+    const uword in_col2 = col_span.b;
+  
+    return ( (in_row < n_rows) && (in_col1 <= in_col2) && (in_col2 < n_cols) );
+    }
+  }
+
+
+
+template<typename eT>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::in_range(const span& row_span, const span& col_span) const
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword in_row1 = row_span.a;
+  const uword in_row2 = row_span.b;
+  
+  const uword in_col1 = col_span.a;
+  const uword in_col2 = col_span.b;
+  
+  const bool rows_ok = row_span.whole ? true : ( (in_row1 <= in_row2) && (in_row2 < n_rows) );
+  const bool cols_ok = col_span.whole ? true : ( (in_col1 <= in_col2) && (in_col2 < n_cols) );
+  
+  return ( (rows_ok == true) && (cols_ok == true) );
+  }
+
+
+
+//! returns a pointer to array of eTs for a specified column; no bounds check
+template<typename eT>
+arma_inline
+arma_warn_unused
+eT*
+Mat<eT>::colptr(const uword in_col)
+  {
+  return & access::rw(mem[in_col*n_rows]);
+  }
+
+
+
+//! returns a pointer to array of eTs for a specified column; no bounds check
+template<typename eT>
+arma_inline
+arma_warn_unused
+const eT*
+Mat<eT>::colptr(const uword in_col) const
+  {
+  return & mem[in_col*n_rows];
+  }
+
+
+
+//! returns a pointer to array of eTs used by the matrix
+template<typename eT>
+arma_inline
+arma_warn_unused
+eT*
+Mat<eT>::memptr()
+  {
+  return const_cast<eT*>(mem);
+  }
+
+
+
+//! returns a pointer to array of eTs used by the matrix
+template<typename eT>
+arma_inline
+arma_warn_unused
+const eT*
+Mat<eT>::memptr() const
+  {
+  return mem;
+  }
+
+
+
+//! print contents of the matrix (to the cout stream),
+//! optionally preceding with a user specified line of text.
+//! the precision and cell width are modified.
+//! on return, the stream's state are restored to their original values.
+template<typename eT>
+inline
+void
+Mat<eT>::impl_print(const std::string& extra_text) const
+  {
+  arma_extra_debug_sigprint();
+  
+  if(extra_text.length() != 0)
+    {
+    const std::streamsize orig_width = ARMA_DEFAULT_OSTREAM.width();
+    
+    ARMA_DEFAULT_OSTREAM << extra_text << '\n';
+  
+    ARMA_DEFAULT_OSTREAM.width(orig_width);
+    }
+  
+  arma_ostream::print(ARMA_DEFAULT_OSTREAM, *this, true);
+  }
+
+
+
+//! print contents of the matrix to a user specified stream,
+//! optionally preceding with a user specified line of text.
+//! the precision and cell width are modified.
+//! on return, the stream's state are restored to their original values.
+template<typename eT>
+inline
+void
+Mat<eT>::impl_print(std::ostream& user_stream, const std::string& extra_text) const
+  {
+  arma_extra_debug_sigprint();
+  
+  if(extra_text.length() != 0)
+    {
+    const std::streamsize orig_width = user_stream.width();
+    
+    user_stream << extra_text << '\n';
+    
+    user_stream.width(orig_width);
+    }
+  
+  arma_ostream::print(user_stream, *this, true);
+  }
+
+
+
+//! print contents of the matrix (to the cout stream),
+//! optionally preceding with a user specified line of text.
+//! the stream's state are used as is and are not modified
+//! (i.e. the precision and cell width are not modified).
+template<typename eT>
+inline
+void
+Mat<eT>::impl_raw_print(const std::string& extra_text) const
+  {
+  arma_extra_debug_sigprint();
+  
+  if(extra_text.length() != 0)
+    {
+    const std::streamsize orig_width = ARMA_DEFAULT_OSTREAM.width();
+    
+    ARMA_DEFAULT_OSTREAM << extra_text << '\n';
+  
+    ARMA_DEFAULT_OSTREAM.width(orig_width);
+    }
+  
+  arma_ostream::print(ARMA_DEFAULT_OSTREAM, *this, false);
+  }
+
+
+
+//! print contents of the matrix to a user specified stream,
+//! optionally preceding with a user specified line of text.
+//! the stream's state are used as is and are not modified.
+//! (i.e. the precision and cell width are not modified).
+template<typename eT>
+inline
+void
+Mat<eT>::impl_raw_print(std::ostream& user_stream, const std::string& extra_text) const
+  {
+  arma_extra_debug_sigprint();
+  
+  if(extra_text.length() != 0)
+    {
+    const std::streamsize orig_width = user_stream.width();
+  
+    user_stream << extra_text << '\n';
+  
+    user_stream.width(orig_width);
+    }
+  
+  arma_ostream::print(user_stream, *this, false);
+  }
+
+
+
+//! change the matrix to have user specified dimensions (data is not preserved)
+template<typename eT>
+inline
+void
+Mat<eT>::set_size(const uword in_elem)
+  {
+  arma_extra_debug_sigprint();
+  
+  switch(vec_state)
+    {
+    case 0:
+    case 1:
+      init_warm(in_elem, 1);
+      break;
+    
+    case 2:
+      init_warm(1, in_elem);
+      break;
+      
+    default:
+      ;
+    }
+  }
+
+
+
+//! change the matrix to have user specified dimensions (data is not preserved)
+template<typename eT>
+inline
+void
+Mat<eT>::set_size(const uword in_rows, const uword in_cols)
+  {
+  arma_extra_debug_sigprint();
+  
+  init_warm(in_rows, in_cols);
+  }
+
+
+
+//! change the matrix to have user specified dimensions (data is preserved)
+template<typename eT>
+inline
+void
+Mat<eT>::resize(const uword in_elem)
+  {
+  arma_extra_debug_sigprint();
+  
+  switch(vec_state)
+    {
+    case 0:
+    case 1:
+      (*this).resize(in_elem, 1);
+      break;
+    
+    case 2:
+      (*this).resize(1, in_elem);
+      break;
+      
+    default:
+      ;
+    }
+  }
+
+
+
+//! change the matrix to have user specified dimensions (data is preserved)
+template<typename eT>
+inline
+void
+Mat<eT>::resize(const uword in_rows, const uword in_cols)
+  {
+  arma_extra_debug_sigprint();
+  
+  *this = arma::resize(*this, in_rows, in_cols);
+  }
+
+
+
+//! change the matrix to have user specified dimensions (data is preserved)
+template<typename eT>
+inline
+void
+Mat<eT>::reshape(const uword in_rows, const uword in_cols, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  *this = arma::reshape(*this, in_rows, in_cols, dim);
+  }
+
+
+
+//! change the matrix (without preserving data) to have the same dimensions as the given expression 
+template<typename eT>
+template<typename eT2, typename expr>
+inline
+void
+Mat<eT>::copy_size(const Base<eT2, expr>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const Proxy<expr> P(X.get_ref());
+  
+  const uword X_n_rows = P.get_n_rows();
+  const uword X_n_cols = P.get_n_cols();
+  
+  init_warm(X_n_rows, X_n_cols);
+  }
+
+
+
+//! transform each element in the matrix using a functor
+template<typename eT>
+template<typename functor>
+inline
+const Mat<eT>&
+Mat<eT>::transform(functor F)
+  {
+  arma_extra_debug_sigprint();
+  
+  eT* out_mem = memptr();
+  
+  const uword N = n_elem;
+  
+  uword ii, jj;
+  
+  for(ii=0, jj=1; jj < N; ii+=2, jj+=2)
+    {
+    eT tmp_ii = out_mem[ii];
+    eT tmp_jj = out_mem[jj];
+    
+    tmp_ii = eT( F(tmp_ii) );
+    tmp_jj = eT( F(tmp_jj) );
+    
+    out_mem[ii] = tmp_ii;
+    out_mem[jj] = tmp_jj;
+    }
+  
+  if(ii < N)
+    {
+    out_mem[ii] = eT( F(out_mem[ii]) );
+    }
+  
+  return *this;
+  }
+
+
+
+//! imbue (fill) the matrix with values provided by a functor
+template<typename eT>
+template<typename functor>
+inline
+const Mat<eT>&
+Mat<eT>::imbue(functor F)
+  {
+  arma_extra_debug_sigprint();
+  
+  eT* out_mem = memptr();
+  
+  const uword N = n_elem;
+  
+  uword ii, jj;
+  
+  for(ii=0, jj=1; jj < N; ii+=2, jj+=2)
+    {
+    const eT tmp_ii = eT( F() );
+    const eT tmp_jj = eT( F() );
+    
+    out_mem[ii] = tmp_ii;
+    out_mem[jj] = tmp_jj;
+    }
+  
+  if(ii < N)
+    {
+    out_mem[ii] = eT( F() );
+    }
+  
+  return *this;
+  }
+
+
+
+//! fill the matrix with the specified value
+template<typename eT>
+arma_hot
+inline
+const Mat<eT>&
+Mat<eT>::fill(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  arrayops::inplace_set( memptr(), val, n_elem );
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::zeros()
+  {
+  arma_extra_debug_sigprint();
+  
+  return fill(eT(0));
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::zeros(const uword in_elem)
+  {
+  arma_extra_debug_sigprint();
+  
+  set_size(in_elem);
+  
+  return fill(eT(0));
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::zeros(const uword in_rows, const uword in_cols)
+  {
+  arma_extra_debug_sigprint();
+
+  set_size(in_rows, in_cols);
+  
+  return fill(eT(0));
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::ones()
+  {
+  arma_extra_debug_sigprint();
+  
+  return fill(eT(1));
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::ones(const uword in_elem)
+  {
+  arma_extra_debug_sigprint();
+  
+  set_size(in_elem);
+  
+  return fill(eT(1));
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::ones(const uword in_rows, const uword in_cols)
+  {
+  arma_extra_debug_sigprint();
+
+  set_size(in_rows, in_cols);
+  
+  return fill(eT(1));
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::randu()
+  {
+  arma_extra_debug_sigprint();
+  
+  eop_aux_randu<eT>::fill( memptr(), n_elem );
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::randu(const uword in_elem)
+  {
+  arma_extra_debug_sigprint();
+  
+  set_size(in_elem);
+  
+  return (*this).randu();
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::randu(const uword in_rows, const uword in_cols)
+  {
+  arma_extra_debug_sigprint();
+  
+  set_size(in_rows, in_cols);
+  
+  return (*this).randu();
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::randn()
+  {
+  arma_extra_debug_sigprint();
+  
+  eop_aux_randn<eT>::fill( memptr(), n_elem );
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::randn(const uword in_elem)
+  {
+  arma_extra_debug_sigprint();
+  
+  set_size(in_elem);
+  
+  return (*this).randn();
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::randn(const uword in_rows, const uword in_cols)
+  {
+  arma_extra_debug_sigprint();
+  
+  set_size(in_rows, in_cols);
+  
+  return (*this).randn();
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::eye()
+  {
+  arma_extra_debug_sigprint();
+  
+  fill(eT(0));
+  
+  const uword N = (std::min)(n_rows, n_cols);
+  
+  for(uword ii=0; ii<N; ++ii)
+    {
+    at(ii,ii) = eT(1);
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+const Mat<eT>&
+Mat<eT>::eye(const uword in_rows, const uword in_cols)
+  {
+  arma_extra_debug_sigprint();
+  
+  set_size(in_rows, in_cols);
+  
+  return (*this).eye();
+  }
+
+
+
+template<typename eT>
+inline
+void
+Mat<eT>::reset()
+  {
+  arma_extra_debug_sigprint();
+  
+  switch(vec_state)
+    {
+    default:
+      init_warm(0, 0);
+      break;
+      
+    case 1:
+      init_warm(0, 1);
+      break;
+    
+    case 2:
+      init_warm(1, 0);
+      break;
+    }
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+void
+Mat<eT>::set_real(const Base<typename Mat<eT>::pod_type,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat_aux::set_real(*this, X);
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+void
+Mat<eT>::set_imag(const Base<typename Mat<eT>::pod_type,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat_aux::set_imag(*this, X);
+  }
+
+
+
+template<typename eT>
+inline
+arma_warn_unused
+eT
+Mat<eT>::min() const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (n_elem == 0), "min(): object has no elements" );
+  
+  return op_min::direct_min(memptr(), n_elem);
+  }
+
+
+
+template<typename eT>
+inline
+arma_warn_unused
+eT
+Mat<eT>::max() const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (n_elem == 0), "max(): object has no elements" );
+  
+  return op_max::direct_max(memptr(), n_elem);
+  }
+
+
+
+template<typename eT>
+inline
+eT
+Mat<eT>::min(uword& index_of_min_val) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (n_elem == 0), "min(): object has no elements" );
+  
+  return op_min::direct_min(memptr(), n_elem, index_of_min_val);
+  }
+
+
+
+template<typename eT>
+inline
+eT
+Mat<eT>::max(uword& index_of_max_val) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (n_elem == 0), "max(): object has no elements" );
+  
+  return op_max::direct_max(memptr(), n_elem, index_of_max_val);
+  }
+
+
+
+template<typename eT>
+inline
+eT
+Mat<eT>::min(uword& row_of_min_val, uword& col_of_min_val) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (n_elem == 0), "min(): object has no elements" );
+  
+  uword iq;
+  
+  eT val = op_min::direct_min(memptr(), n_elem, iq);
+  
+  row_of_min_val = iq % n_rows;
+  col_of_min_val = iq / n_rows;
+  
+  return val;
+  }
+
+
+
+template<typename eT>
+inline
+eT
+Mat<eT>::max(uword& row_of_max_val, uword& col_of_max_val) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (n_elem == 0), "max(): object has no elements" );
+  
+  uword iq;
+  
+  eT val = op_max::direct_max(memptr(), n_elem, iq);
+  
+  row_of_max_val = iq % n_rows;
+  col_of_max_val = iq / n_rows;
+  
+  return val;
+  }
+
+
+
+//! save the matrix to a file
+template<typename eT>
+inline
+bool
+Mat<eT>::save(const std::string name, const file_type type, const bool print_status) const
+  {
+  arma_extra_debug_sigprint();
+  
+  bool save_okay;
+  
+  switch(type)
+    {
+    case raw_ascii:
+      save_okay = diskio::save_raw_ascii(*this, name);
+      break;
+    
+    case arma_ascii:
+      save_okay = diskio::save_arma_ascii(*this, name);
+      break;
+    
+    case csv_ascii:
+      save_okay = diskio::save_csv_ascii(*this, name);
+      break;
+    
+    case raw_binary:
+      save_okay = diskio::save_raw_binary(*this, name);
+      break;
+    
+    case arma_binary:
+      save_okay = diskio::save_arma_binary(*this, name);
+      break;
+      
+    case pgm_binary:
+      save_okay = diskio::save_pgm_binary(*this, name);
+      break;
+    
+    case hdf5_binary:
+      save_okay = diskio::save_hdf5_binary(*this, name);
+      break;
+    
+    default:
+      arma_warn(print_status, "Mat::save(): unsupported file type");
+      save_okay = false;
+    }
+  
+  arma_warn( (print_status && (save_okay == false)), "Mat::save(): couldn't write to ", name);
+  
+  return save_okay;
+  }
+
+
+
+//! save the matrix to a stream
+template<typename eT>
+inline
+bool
+Mat<eT>::save(std::ostream& os, const file_type type, const bool print_status) const
+  {
+  arma_extra_debug_sigprint();
+  
+  bool save_okay;
+  
+  switch(type)
+    {
+    case raw_ascii:
+      save_okay = diskio::save_raw_ascii(*this, os);
+      break;
+    
+    case arma_ascii:
+      save_okay = diskio::save_arma_ascii(*this, os);
+      break;
+    
+    case csv_ascii:
+      save_okay = diskio::save_csv_ascii(*this, os);
+      break;
+    
+    case raw_binary:
+      save_okay = diskio::save_raw_binary(*this, os);
+      break;
+    
+    case arma_binary:
+      save_okay = diskio::save_arma_binary(*this, os);
+      break;
+      
+    case pgm_binary:
+      save_okay = diskio::save_pgm_binary(*this, os);
+      break;
+    
+    default:
+      arma_warn(print_status, "Mat::save(): unsupported file type");
+      save_okay = false;
+    }
+  
+  arma_warn( (print_status && (save_okay == false)), "Mat::save(): couldn't write to the given stream");
+  
+  return save_okay;
+  }
+
+
+
+//! load a matrix from a file
+template<typename eT>
+inline
+bool
+Mat<eT>::load(const std::string name, const file_type type, const bool print_status)
+  {
+  arma_extra_debug_sigprint();
+  
+  bool load_okay;
+  std::string err_msg;
+  
+  switch(type)
+    {
+    case auto_detect:
+      load_okay = diskio::load_auto_detect(*this, name, err_msg);
+      break;
+    
+    case raw_ascii:
+      load_okay = diskio::load_raw_ascii(*this, name, err_msg);
+      break;
+    
+    case arma_ascii:
+      load_okay = diskio::load_arma_ascii(*this, name, err_msg);
+      break;
+    
+    case csv_ascii:
+      load_okay = diskio::load_csv_ascii(*this, name, err_msg);
+      break;
+    
+    case raw_binary:
+      load_okay = diskio::load_raw_binary(*this, name, err_msg);
+      break;
+    
+    case arma_binary:
+      load_okay = diskio::load_arma_binary(*this, name, err_msg);
+      break;
+      
+    case pgm_binary:
+      load_okay = diskio::load_pgm_binary(*this, name, err_msg);
+      break;
+    
+    case hdf5_binary:
+      load_okay = diskio::load_hdf5_binary(*this, name, err_msg);
+      break;
+
+    default:
+      arma_warn(print_status, "Mat::load(): unsupported file type");
+      load_okay = false;
+    }
+  
+  if( (print_status == true) && (load_okay == false) )
+    {
+    if(err_msg.length() > 0)
+      {
+      arma_warn(true, "Mat::load(): ", err_msg, name);
+      }
+    else
+      {
+      arma_warn(true, "Mat::load(): couldn't read ", name);
+      }
+    }
+  
+  if(load_okay == false)
+    {
+    (*this).reset();
+    }
+    
+  return load_okay;
+  }
+
+
+
+//! load a matrix from a stream
+template<typename eT>
+inline
+bool
+Mat<eT>::load(std::istream& is, const file_type type, const bool print_status)
+  {
+  arma_extra_debug_sigprint();
+  
+  bool load_okay;
+  std::string err_msg;
+  
+  switch(type)
+    {
+    case auto_detect:
+      load_okay = diskio::load_auto_detect(*this, is, err_msg);
+      break;
+    
+    case raw_ascii:
+      load_okay = diskio::load_raw_ascii(*this, is, err_msg);
+      break;
+    
+    case arma_ascii:
+      load_okay = diskio::load_arma_ascii(*this, is, err_msg);
+      break;
+    
+    case csv_ascii:
+      load_okay = diskio::load_csv_ascii(*this, is, err_msg);
+      break;
+    
+    case raw_binary:
+      load_okay = diskio::load_raw_binary(*this, is, err_msg);
+      break;
+    
+    case arma_binary:
+      load_okay = diskio::load_arma_binary(*this, is, err_msg);
+      break;
+      
+    case pgm_binary:
+      load_okay = diskio::load_pgm_binary(*this, is, err_msg);
+      break;
+    
+    default:
+      arma_warn(print_status, "Mat::load(): unsupported file type");
+      load_okay = false;
+    }
+  
+  
+  if( (print_status == true) && (load_okay == false) )
+    {
+    if(err_msg.length() > 0)
+      {
+      arma_warn(true, "Mat::load(): ", err_msg, "the given stream");
+      }
+    else
+      {
+      arma_warn(true, "Mat::load(): couldn't load from the given stream");
+      }
+    }
+  
+  if(load_okay == false)
+    {
+    (*this).reset();
+    }
+    
+  return load_okay;
+  }
+
+
+
+//! save the matrix to a file, without printing any error messages
+template<typename eT>
+inline
+bool
+Mat<eT>::quiet_save(const std::string name, const file_type type) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return (*this).save(name, type, false);
+  }
+
+
+
+//! save the matrix to a stream, without printing any error messages
+template<typename eT>
+inline
+bool
+Mat<eT>::quiet_save(std::ostream& os, const file_type type) const
+  {
+  arma_extra_debug_sigprint();
+  
+  return (*this).save(os, type, false);
+  }
+
+
+
+//! load a matrix from a file, without printing any error messages
+template<typename eT>
+inline
+bool
+Mat<eT>::quiet_load(const std::string name, const file_type type)
+  {
+  arma_extra_debug_sigprint();
+  
+  return (*this).load(name, type, false);
+  }
+
+
+
+//! load a matrix from a stream, without printing any error messages
+template<typename eT>
+inline
+bool
+Mat<eT>::quiet_load(std::istream& is, const file_type type)
+  {
+  arma_extra_debug_sigprint();
+  
+  return (*this).load(is, type, false);
+  }
+
+
+
+template<typename eT>
+inline
+Mat<eT>::row_iterator::row_iterator(Mat<eT>& in_M, const uword in_row)
+  : M  (in_M  )
+  , row(in_row)
+  , col(0     )
+  {
+  arma_extra_debug_sigprint();
+  }
+
+
+
+template<typename eT>
+inline
+eT&
+Mat<eT>::row_iterator::operator*()
+  {
+  return M.at(row,col);
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::row_iterator&
+Mat<eT>::row_iterator::operator++()
+  {
+  ++col;
+  
+  if(col >= M.n_cols)
+    {
+    col = 0;
+    ++row;
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+void
+Mat<eT>::row_iterator::operator++(int)
+  {
+  operator++();
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::row_iterator&
+Mat<eT>::row_iterator::operator--()
+  {
+  if(col > 0)
+    {
+    --col;
+    }
+  else
+    {
+    if(row > 0)
+      {
+      col = M.n_cols - 1;
+      --row;
+      }
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+void
+Mat<eT>::row_iterator::operator--(int)
+  {
+  operator--();
+  }
+
+
+
+template<typename eT>
+inline
+bool
+Mat<eT>::row_iterator::operator!=(const typename Mat<eT>::row_iterator& X) const
+  {
+  return ( (row != X.row) || (col != X.col) ) ? true : false;
+  }
+
+
+
+template<typename eT>
+inline
+bool
+Mat<eT>::row_iterator::operator==(const typename Mat<eT>::row_iterator& X) const
+  {
+  return ( (row == X.row) && (col == X.col) ) ? true : false;
+  }
+
+
+
+template<typename eT>
+inline
+Mat<eT>::const_row_iterator::const_row_iterator(const Mat<eT>& in_M, const uword in_row)
+  : M  (in_M  )
+  , row(in_row)
+  , col(0     )
+  {
+  arma_extra_debug_sigprint();
+  }
+
+
+
+template<typename eT>
+inline
+Mat<eT>::const_row_iterator::const_row_iterator(const typename Mat<eT>::row_iterator& X)
+  : M  (X.M)
+  , row(X.row)
+  , col(X.col)
+  {
+  arma_extra_debug_sigprint();
+  }
+
+
+
+template<typename eT>
+inline
+eT
+Mat<eT>::const_row_iterator::operator*() const
+  {
+  return M.at(row,col);
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_row_iterator&
+Mat<eT>::const_row_iterator::operator++()
+  {
+  ++col;
+  
+  if(col >= M.n_cols)
+    {
+    col = 0;
+    ++row;
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+void
+Mat<eT>::const_row_iterator::operator++(int)
+  {
+  operator++();
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_row_iterator&
+Mat<eT>::const_row_iterator::operator--()
+  {
+  if(col > 0)
+    {
+    --col;
+    }
+  else
+    {
+    if(row > 0)
+      {
+      col = M.n_cols - 1;
+      --row;
+      }
+    }
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+inline
+void
+Mat<eT>::const_row_iterator::operator--(int)
+  {
+  operator--();
+  }
+
+
+
+template<typename eT>
+inline
+bool
+Mat<eT>::const_row_iterator::operator!=(const typename Mat<eT>::const_row_iterator& X) const
+  {
+  return ( (row != X.row) || (col != X.col) ) ? true : false;
+  }
+
+
+
+template<typename eT>
+inline
+bool
+Mat<eT>::const_row_iterator::operator==(const typename Mat<eT>::const_row_iterator& X) const
+  {
+  return ( (row == X.row) && (col == X.col) ) ? true : false;
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::iterator
+Mat<eT>::begin()
+  {
+  arma_extra_debug_sigprint();
+  
+  return memptr();
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_iterator
+Mat<eT>::begin() const
+  {
+  arma_extra_debug_sigprint();
+  
+  return memptr();
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_iterator
+Mat<eT>::cbegin() const
+  {
+  arma_extra_debug_sigprint();
+  
+  return memptr();
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::iterator
+Mat<eT>::end()
+  {
+  arma_extra_debug_sigprint();
+  
+  return memptr() + n_elem;
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_iterator
+Mat<eT>::end() const
+  {
+  arma_extra_debug_sigprint();
+  
+  return memptr() + n_elem;
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_iterator
+Mat<eT>::cend() const
+  {
+  arma_extra_debug_sigprint();
+  
+  return memptr() + n_elem;
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::col_iterator
+Mat<eT>::begin_col(const uword col_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (col_num >= n_cols), "begin_col(): index out of bounds");
+  
+  return colptr(col_num);
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_col_iterator
+Mat<eT>::begin_col(const uword col_num) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (col_num >= n_cols), "begin_col(): index out of bounds");
+  
+  return colptr(col_num);
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::col_iterator
+Mat<eT>::end_col(const uword col_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (col_num >= n_cols), "end_col(): index out of bounds");
+  
+  return colptr(col_num) + n_rows;
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_col_iterator
+Mat<eT>::end_col(const uword col_num) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (col_num >= n_cols), "end_col(): index out of bounds");
+  
+  return colptr(col_num) + n_rows;
+  }
+  
+
+
+template<typename eT>
+inline
+typename Mat<eT>::row_iterator
+Mat<eT>::begin_row(const uword row_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (row_num >= n_rows), "Mat::begin_row(): index out of bounds" );
+  
+  return typename Mat<eT>::row_iterator(*this, row_num);
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_row_iterator
+Mat<eT>::begin_row(const uword row_num) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (row_num >= n_rows), "Mat::begin_row(): index out of bounds" );
+  
+  return typename Mat<eT>::const_row_iterator(*this, row_num);
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::row_iterator
+Mat<eT>::end_row(const uword row_num)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (row_num >= n_rows), "Mat::end_row(): index out of bounds" );
+  
+  return typename Mat<eT>::row_iterator(*this, row_num + 1);
+  }
+
+
+
+template<typename eT>
+inline
+typename Mat<eT>::const_row_iterator
+Mat<eT>::end_row(const uword row_num) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( (row_num >= n_rows), "Mat::end_row(): index out of bounds" );
+  
+  return typename Mat<eT>::const_row_iterator(*this, row_num + 1);
+  }
+
+
+
+//! resets this matrix to an empty matrix
+template<typename eT>
+inline
+void
+Mat<eT>::clear()
+  {
+  reset();
+  }
+
+
+
+//! returns true if the matrix has no elements
+template<typename eT>
+inline
+bool
+Mat<eT>::empty() const
+  {
+  return (n_elem == 0);
+  }
+
+
+
+//! returns the number of elements in this matrix
+template<typename eT>
+inline
+uword
+Mat<eT>::size() const
+  {
+  return n_elem;
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::fixed()
+  : Mat<eT>( arma_fixed_indicator(), fixed_n_rows, fixed_n_cols, 0, ((use_extra) ? mem_local_extra : mem_local) )
+  {
+  arma_extra_debug_sigprint_this(this);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::fixed(const fixed<fixed_n_rows, fixed_n_cols>& X)
+  : Mat<eT>( arma_fixed_indicator(), fixed_n_rows, fixed_n_cols, 0, ((use_extra) ? mem_local_extra : mem_local) )
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  eT* dest = (use_extra) ? mem_local_extra : mem_local;
+  
+  arrayops::copy( dest, X.mem, fixed_n_elem );
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+template<typename T1>
+inline
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::fixed(const Base<eT,T1>& A)
+  : Mat<eT>( arma_fixed_indicator(), fixed_n_rows, fixed_n_cols, 0, ((use_extra) ? mem_local_extra : mem_local) )
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  Mat<eT>::operator=(A.get_ref()); 
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+template<typename T1, typename T2>
+inline
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::fixed(const Base<pod_type,T1>& A, const Base<pod_type,T2>& B)
+  : Mat<eT>( arma_fixed_indicator(), fixed_n_rows, fixed_n_cols, 0, ((use_extra) ? mem_local_extra : mem_local) )
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  Mat<eT>::init(A,B);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+inline
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::fixed(const eT* aux_mem)
+  : Mat<eT>( arma_fixed_indicator(), fixed_n_rows, fixed_n_cols, 0, ((use_extra) ? mem_local_extra : mem_local) )
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  eT* dest = (use_extra) ? mem_local_extra : mem_local;
+  
+  arrayops::copy( dest, aux_mem, fixed_n_elem );
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+inline
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::fixed(const char* text)
+  : Mat<eT>( arma_fixed_indicator(), fixed_n_rows, fixed_n_cols, 0, ((use_extra) ? mem_local_extra : mem_local) )
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  Mat<eT>::operator=(text);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+inline
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::fixed(const std::string& text)
+  : Mat<eT>( arma_fixed_indicator(), fixed_n_rows, fixed_n_cols, 0, ((use_extra) ? mem_local_extra : mem_local) )
+  {
+  arma_extra_debug_sigprint_this(this);
+  
+  Mat<eT>::operator=(text);
+  }
+
+
+
+#if defined(ARMA_USE_CXX11)
+  
+  template<typename eT>
+  template<uword fixed_n_rows, uword fixed_n_cols>
+  inline
+  Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::fixed(const std::initializer_list<eT>& list)
+    : Mat<eT>( arma_fixed_indicator(), fixed_n_rows, fixed_n_cols, 0, ((use_extra) ? mem_local_extra : mem_local) )
+    {
+    arma_extra_debug_sigprint_this(this);
+    
+    (*this).operator=(list);
+    }
+
+
+
+  template<typename eT>
+  template<uword fixed_n_rows, uword fixed_n_cols>
+  inline
+  const Mat<eT>&
+  Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::operator=(const std::initializer_list<eT>& list)
+    {
+    arma_extra_debug_sigprint();
+    
+    const uword N = list.size();
+    
+    arma_debug_check( (N > fixed_n_elem), "Mat::fixed: initialiser list is too long" );
+    
+    eT* this_mem = (*this).memptr();
+    
+    arrayops::copy( this_mem, list.begin(), N );
+    
+    for(uword iq=N; iq < fixed_n_elem; ++iq) { this_mem[iq] = eT(0); }
+    
+    return *this;
+    }
+  
+#endif
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+const Op< typename Mat<eT>::template fixed<fixed_n_rows, fixed_n_cols>::Mat_fixed_type, op_htrans >
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::t() const
+  {
+  return Op< typename Mat<eT>::template fixed<fixed_n_rows, fixed_n_cols>::Mat_fixed_type, op_htrans >(*this);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+const Op< typename Mat<eT>::template fixed<fixed_n_rows, fixed_n_cols>::Mat_fixed_type, op_htrans >
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::ht() const
+  {
+  return Op< typename Mat<eT>::template fixed<fixed_n_rows, fixed_n_cols>::Mat_fixed_type, op_htrans >(*this);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+const Op< typename Mat<eT>::template fixed<fixed_n_rows, fixed_n_cols>::Mat_fixed_type, op_strans >
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::st() const
+  {
+  return Op< typename Mat<eT>::template fixed<fixed_n_rows, fixed_n_cols>::Mat_fixed_type, op_strans >(*this);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::at_alt(const uword ii) const
+  {
+  #if defined(ARMA_HAVE_ALIGNED_ATTRIBUTE)
+    
+    return (use_extra) ? mem_local_extra[ii] : mem_local[ii];
+    
+  #else
+    const eT* mem_aligned = (use_extra) ? mem_local_extra : mem_local;
+    
+    memory::mark_as_aligned(mem_aligned);
+    
+    return mem_aligned[ii];
+  #endif
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::operator[] (const uword ii)
+  {
+  return (use_extra) ? mem_local_extra[ii] : mem_local[ii];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::operator[] (const uword ii) const
+  {
+  return (use_extra) ? mem_local_extra[ii] : mem_local[ii];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::at(const uword ii)
+  {
+  return (use_extra) ? mem_local_extra[ii] : mem_local[ii];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::at(const uword ii) const
+  {
+  return (use_extra) ? mem_local_extra[ii] : mem_local[ii];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::operator() (const uword ii)
+  {
+  arma_debug_check( (ii >= fixed_n_elem), "Mat::operator(): index out of bounds");
+  
+  return (use_extra) ? mem_local_extra[ii] : mem_local[ii];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::operator() (const uword ii) const
+  {
+  arma_debug_check( (ii >= fixed_n_elem), "Mat::operator(): index out of bounds");
+  
+  return (use_extra) ? mem_local_extra[ii] : mem_local[ii];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::at(const uword in_row, const uword in_col)
+  {
+  const uword iq = in_row + in_col*fixed_n_rows;
+  
+  return (use_extra) ? mem_local_extra[iq] : mem_local[iq];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::at(const uword in_row, const uword in_col) const
+  {
+  const uword iq = in_row + in_col*fixed_n_rows;
+  
+  return (use_extra) ? mem_local_extra[iq] : mem_local[iq];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::operator() (const uword in_row, const uword in_col)
+  {
+  arma_debug_check( ((in_row >= fixed_n_rows) || (in_col >= fixed_n_cols)), "Mat::operator(): index out of bounds");
+  
+  const uword iq = in_row + in_col*fixed_n_rows;
+  
+  return (use_extra) ? mem_local_extra[iq] : mem_local[iq];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+const eT&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::operator() (const uword in_row, const uword in_col) const
+  {
+  arma_debug_check( ((in_row >= fixed_n_rows) || (in_col >= fixed_n_cols)), "Mat::operator(): index out of bounds");
+  
+  const uword iq = in_row + in_col*fixed_n_rows;
+  
+  return (use_extra) ? mem_local_extra[iq] : mem_local[iq];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+eT*
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::colptr(const uword in_col)
+  {
+  eT* mem_actual = (use_extra) ? mem_local_extra : mem_local;
+  
+  return & access::rw(mem_actual[in_col*fixed_n_rows]);
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+const eT*
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::colptr(const uword in_col) const
+  {
+  const eT* mem_actual = (use_extra) ? mem_local_extra : mem_local;
+  
+  return & mem_actual[in_col*fixed_n_rows];
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+eT*
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::memptr()
+  {
+  return (use_extra) ? mem_local_extra : mem_local;
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+const eT*
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::memptr() const
+  {
+  return (use_extra) ? mem_local_extra : mem_local;
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_inline
+arma_warn_unused
+bool
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::is_vec() const
+  {
+  return ( (fixed_n_rows == 1) || (fixed_n_cols == 1) );
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_hot
+inline
+const Mat<eT>&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::fill(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  eT* mem_use = (use_extra) ? &(mem_local_extra[0]) : &(mem_local[0]);
+  
+  arrayops::inplace_set_fixed<eT,fixed_n_elem>( mem_use, val );
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_hot
+inline
+const Mat<eT>&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::zeros()
+  {
+  arma_extra_debug_sigprint();
+  
+  eT* mem_use = (use_extra) ? &(mem_local_extra[0]) : &(mem_local[0]);
+  
+  arrayops::inplace_set_fixed<eT,fixed_n_elem>( mem_use, eT(0) );
+  
+  return *this;
+  }
+
+
+
+template<typename eT>
+template<uword fixed_n_rows, uword fixed_n_cols>
+arma_hot
+inline
+const Mat<eT>&
+Mat<eT>::fixed<fixed_n_rows, fixed_n_cols>::ones()
+  {
+  arma_extra_debug_sigprint();
+  
+  eT* mem_use = (use_extra) ? &(mem_local_extra[0]) : &(mem_local[0]);
+  
+  arrayops::inplace_set_fixed<eT,fixed_n_elem>( mem_use, eT(1) );
+  
+  return *this;
+  }
+
+
+
+//! prefix ++
+template<typename eT>
+arma_inline
+void
+Mat_aux::prefix_pp(Mat<eT>& x)
+  {
+        eT*   memptr = x.memptr();
+  const uword n_elem = x.n_elem;
+  
+  uword i,j;
+
+  for(i=0, j=1; j<n_elem; i+=2, j+=2)
+    {
+    ++(memptr[i]);
+    ++(memptr[j]);
+    }
+  
+  if(i < n_elem)
+    {
+    ++(memptr[i]);
+    }
+  }
+
+
+
+//! prefix ++ for complex numbers (work around for limitations of the std::complex class)
+template<typename T>
+arma_inline
+void
+Mat_aux::prefix_pp(Mat< std::complex<T> >& x)
+  {
+  x += T(1);
+  }
+
+
+
+//! postfix ++
+template<typename eT>
+arma_inline
+void
+Mat_aux::postfix_pp(Mat<eT>& x)
+  {
+        eT*   memptr = x.memptr();
+  const uword n_elem = x.n_elem;
+  
+  uword i,j;
+  
+  for(i=0, j=1; j<n_elem; i+=2, j+=2)
+    {
+    (memptr[i])++;
+    (memptr[j])++;
+    }
+  
+  if(i < n_elem)
+    {
+    (memptr[i])++;
+    }
+  }
+
+
+
+//! postfix ++ for complex numbers (work around for limitations of the std::complex class)
+template<typename T>
+arma_inline
+void
+Mat_aux::postfix_pp(Mat< std::complex<T> >& x)
+  {
+  x += T(1);
+  }
+
+
+
+//! prefix --
+template<typename eT>
+arma_inline
+void
+Mat_aux::prefix_mm(Mat<eT>& x)
+  {
+        eT*   memptr = x.memptr();
+  const uword n_elem = x.n_elem;
+
+  uword i,j;
+
+  for(i=0, j=1; j<n_elem; i+=2, j+=2)
+    {
+    --(memptr[i]);
+    --(memptr[j]);
+    }
+  
+  if(i < n_elem)
+    {
+    --(memptr[i]);
+    }
+  }
+
+
+
+//! prefix -- for complex numbers (work around for limitations of the std::complex class)
+template<typename T>
+arma_inline
+void
+Mat_aux::prefix_mm(Mat< std::complex<T> >& x)
+  {
+  x -= T(1);
+  }
+
+
+
+//! postfix --
+template<typename eT>
+arma_inline
+void
+Mat_aux::postfix_mm(Mat<eT>& x)
+  {
+        eT*   memptr = x.memptr();
+  const uword n_elem = x.n_elem;
+
+  uword i,j;
+
+  for(i=0, j=1; j<n_elem; i+=2, j+=2)
+    {
+    (memptr[i])--;
+    (memptr[j])--;
+    }
+  
+  if(i < n_elem)
+    {
+    (memptr[i])--;
+    }
+  }
+
+
+
+//! postfix ++ for complex numbers (work around for limitations of the std::complex class)
+template<typename T>
+arma_inline
+void
+Mat_aux::postfix_mm(Mat< std::complex<T> >& x)
+  {
+  x -= T(1);
+  }
+
+
+
+template<typename eT, typename T1>
+inline
+void
+Mat_aux::set_real(Mat<eT>& out, const Base<eT,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const unwrap<T1>   tmp(X.get_ref());
+  const Mat<eT>& A = tmp.M;
+  
+  arma_debug_assert_same_size( out, A, "Mat::set_real()" );
+  
+  out = A;
+  }
+
+
+
+template<typename eT, typename T1>
+inline
+void
+Mat_aux::set_imag(Mat<eT>&, const Base<eT,T1>&)
+  {
+  arma_extra_debug_sigprint();
+  }
+
+
+
+template<typename T, typename T1>
+inline
+void
+Mat_aux::set_real(Mat< std::complex<T> >& out, const Base<T,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename std::complex<T> eT;
+  
+  const Proxy<T1> P(X.get_ref());
+  
+  const uword local_n_rows = P.get_n_rows();
+  const uword local_n_cols = P.get_n_cols();
+  
+  arma_debug_assert_same_size( out.n_rows, out.n_cols, local_n_rows, local_n_cols, "Mat::set_real()" );
+  
+  eT* out_mem = out.memptr();
+  
+  if(Proxy<T1>::prefer_at_accessor == false)
+    {
+    typedef typename Proxy<T1>::ea_type ea_type;
+    
+    ea_type A = P.get_ea();
+    
+    const uword N = out.n_elem;
+    
+    for(uword i=0; i<N; ++i)
+      {
+      out_mem[i] = std::complex<T>( A[i], out_mem[i].imag() );
+      }
+    }
+  else
+    {
+    for(uword col=0; col < local_n_cols; ++col)
+    for(uword row=0; row < local_n_rows; ++row)
+      {
+      (*out_mem) = std::complex<T>( P.at(row,col), (*out_mem).imag() );
+      out_mem++;
+      }
+    }
+  }
+
+
+
+template<typename T, typename T1>
+inline
+void
+Mat_aux::set_imag(Mat< std::complex<T> >& out, const Base<T,T1>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename std::complex<T> eT;
+  
+  const Proxy<T1> P(X.get_ref());
+  
+  const uword local_n_rows = P.get_n_rows();
+  const uword local_n_cols = P.get_n_cols();
+  
+  arma_debug_assert_same_size( out.n_rows, out.n_cols, local_n_rows, local_n_cols, "Mat::set_imag()" );
+  
+  eT* out_mem = out.memptr();
+  
+  if(Proxy<T1>::prefer_at_accessor == false)
+    {
+    typedef typename Proxy<T1>::ea_type ea_type;
+    
+    ea_type A = P.get_ea();
+    
+    const uword N = out.n_elem;
+    
+    for(uword i=0; i<N; ++i)
+      {
+      out_mem[i] = std::complex<T>( out_mem[i].real(), A[i] );
+      }
+    }
+  else
+    {
+    for(uword col=0; col < local_n_cols; ++col)
+    for(uword row=0; row < local_n_rows; ++row)
+      {
+      (*out_mem) = std::complex<T>( (*out_mem).real(), P.at(row,col) );
+      out_mem++;
+      }
+    }
+  }
+
+
+
+#ifdef ARMA_EXTRA_MAT_MEAT
+  #include ARMA_INCFILE_WRAP(ARMA_EXTRA_MAT_MEAT)
+#endif
+
+
+
+//! @}