comparison armadillo-2.4.4/include/armadillo_bits/diagview_meat.hpp @ 0:8b6102e2a9b0

Armadillo Library

+// Copyright (C) 2008-2011 NICTA (www.nicta.com.au)
+// Copyright (C) 2008-2011 Conrad Sanderson
+// 
+// This file is part of the Armadillo C++ library.
+// It is provided without any warranty of fitness
+// for any purpose. You can redistribute this file
+// and/or modify it under the terms of the GNU
+// Lesser General Public License (LGPL) as published
+// by the Free Software Foundation, either version 3
+// of the License or (at your option) any later version.
+// (see http://www.opensource.org/licenses for more info)
+
+
+//! \addtogroup diagview
+//! @{
+
+
+template<typename eT>
+inline
+diagview<eT>::~diagview()
+  {
+  arma_extra_debug_sigprint();
+  }
+
+
+template<typename eT>
+arma_inline
+diagview<eT>::diagview(const Mat<eT>& in_m, const uword in_row_offset, const uword in_col_offset, const uword in_len)
+  : m(in_m)
+  , m_ptr(0)
+  , row_offset(in_row_offset)
+  , col_offset(in_col_offset)
+  , n_rows(in_len)
+  , n_elem(in_len)
+  {
+  arma_extra_debug_sigprint();
+  }
+
+
+
+template<typename eT>
+arma_inline
+diagview<eT>::diagview(Mat<eT>& in_m, const uword in_row_offset, const uword in_col_offset, const uword in_len)
+  : m(in_m)
+  , m_ptr(&in_m)
+  , row_offset(in_row_offset)
+  , col_offset(in_col_offset)
+  , n_rows(in_len)
+  , n_elem(in_len)
+  {
+  arma_extra_debug_sigprint();
+  }
+
+
+
+//! set a diagonal of our matrix using a diagonal from a foreign matrix
+template<typename eT>
+inline
+void
+diagview<eT>::operator= (const diagview<eT>& x)
+  {
+  arma_extra_debug_sigprint();
+  
+  diagview<eT>& t = *this;
+  
+  arma_debug_check( (t.n_elem != x.n_elem), "diagview: diagonals have incompatible lengths");
+  
+        Mat<eT>& t_m = *(t.m_ptr);
+  const Mat<eT>& x_m = x.m;
+  
+  if(&t_m != &x_m)
+    {
+    const uword t_n_elem     = t.n_elem;
+    const uword t_row_offset = t.row_offset;
+    const uword t_col_offset = t.col_offset;
+    
+    const uword x_row_offset = x.row_offset;
+    const uword x_col_offset = x.col_offset;
+    
+    uword i,j;
+    for(i=0, j=1; j < t_n_elem; i+=2, j+=2)
+      {
+      const eT tmp_i = x_m.at(i + x_row_offset, i + x_col_offset);
+      const eT tmp_j = x_m.at(j + x_row_offset, j + x_col_offset);
+      
+      t_m.at(i + t_row_offset, i + t_col_offset) = tmp_i;
+      t_m.at(j + t_row_offset, j + t_col_offset) = tmp_j;
+      }
+    
+    if(i < t_n_elem)
+      {
+      t_m.at(i + t_row_offset, i + t_col_offset) = x_m.at(i + x_row_offset, i + x_col_offset);
+      }
+    }
+  else
+    {
+    const Mat<eT> tmp = x;
+    
+    (*this).operator=(tmp);
+    }
+  }
+
+
+
+template<typename eT>
+inline
+void
+diagview<eT>::operator+=(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& t_m = (*m_ptr);
+  
+  const uword t_n_elem     = n_elem;
+  const uword t_row_offset = row_offset;
+  const uword t_col_offset = col_offset;
+  
+  for(uword i=0; i<t_n_elem; ++i)
+    {
+    t_m.at( i + t_row_offset,  i + t_col_offset) += val;
+    }
+  }
+
+
+
+template<typename eT>
+inline
+void
+diagview<eT>::operator-=(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& t_m = (*m_ptr);
+  
+  const uword t_n_elem     = n_elem;
+  const uword t_row_offset = row_offset;
+  const uword t_col_offset = col_offset;
+  
+  for(uword i=0; i<t_n_elem; ++i)
+    {
+    t_m.at( i + t_row_offset,  i + t_col_offset) -= val;
+    }
+  }
+
+
+
+template<typename eT>
+inline
+void
+diagview<eT>::operator*=(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& t_m = (*m_ptr);
+  
+  const uword t_n_elem     = n_elem;
+  const uword t_row_offset = row_offset;
+  const uword t_col_offset = col_offset;
+  
+  for(uword i=0; i<t_n_elem; ++i)
+    {
+    t_m.at( i + t_row_offset,  i + t_col_offset) *= val;
+    }
+  }
+
+
+
+template<typename eT>
+inline
+void
+diagview<eT>::operator/=(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& t_m = (*m_ptr);
+  
+  const uword t_n_elem     = n_elem;
+  const uword t_row_offset = row_offset;
+  const uword t_col_offset = col_offset;
+  
+  for(uword i=0; i<t_n_elem; ++i)
+    {
+    t_m.at( i + t_row_offset,  i + t_col_offset) /= val;
+    }
+  }
+
+
+
+//! set a diagonal of our matrix using data from a foreign object
+template<typename eT>
+template<typename T1>
+inline
+void
+diagview<eT>::operator= (const Base<eT,T1>& o)
+  {
+  arma_extra_debug_sigprint();
+  
+  const unwrap<T1> tmp(o.get_ref());
+  const Mat<eT>& x = tmp.M;
+  
+  diagview<eT>& t = *this;
+  
+  arma_debug_check
+    (
+    ( (t.n_elem != x.n_elem) || (x.is_vec() == false) ),
+    "diagview: given object has incompatible size"
+    );
+  
+  Mat<eT>& t_m = *(t.m_ptr);
+  
+  const uword t_n_elem     = t.n_elem;
+  const uword t_row_offset = t.row_offset;
+  const uword t_col_offset = t.col_offset;
+  
+  const eT* x_mem = x.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < t_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = x_mem[i];
+    const eT tmp_j = x_mem[j];
+    
+    t_m.at( i + t_row_offset,  i + t_col_offset) = tmp_i;
+    t_m.at( j + t_row_offset,  j + t_col_offset) = tmp_j;
+    }
+  
+  if(i < t_n_elem)
+    {
+    t_m.at( i + t_row_offset,  i + t_col_offset) = x_mem[i];
+    }
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+void
+diagview<eT>::operator+=(const Base<eT,T1>& o)
+  {
+  arma_extra_debug_sigprint();
+  
+  const unwrap<T1> tmp(o.get_ref());
+  const Mat<eT>& x = tmp.M;
+  
+  diagview<eT>& t = *this;
+  
+  arma_debug_check
+    (
+    ( (t.n_elem != x.n_elem) || (x.is_vec() == false) ),
+    "diagview: given object has incompatible size"
+    );
+  
+  Mat<eT>& t_m = *(t.m_ptr);
+  
+  const uword t_n_elem     = t.n_elem;
+  const uword t_row_offset = t.row_offset;
+  const uword t_col_offset = t.col_offset;
+  
+  const eT* x_mem = x.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < t_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = x_mem[i];
+    const eT tmp_j = x_mem[j];
+    
+    t_m.at( i + t_row_offset,  i + t_col_offset) += tmp_i;
+    t_m.at( j + t_row_offset,  j + t_col_offset) += tmp_j;
+    }
+  
+  if(i < t_n_elem)
+    {
+    t_m.at( i + t_row_offset,  i + t_col_offset) += x_mem[i];
+    }
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+void
+diagview<eT>::operator-=(const Base<eT,T1>& o)
+  {
+  arma_extra_debug_sigprint();
+  
+  const unwrap<T1> tmp(o.get_ref());
+  const Mat<eT>& x = tmp.M;
+  
+  diagview<eT>& t = *this;
+  
+  arma_debug_check
+    (
+    ( (t.n_elem != x.n_elem) || (x.is_vec() == false) ),
+    "diagview: given object has incompatible size"
+    );
+  
+  Mat<eT>& t_m = *(t.m_ptr);
+  
+  const uword t_n_elem     = t.n_elem;
+  const uword t_row_offset = t.row_offset;
+  const uword t_col_offset = t.col_offset;
+  
+  const eT* x_mem = x.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < t_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = x_mem[i];
+    const eT tmp_j = x_mem[j];
+    
+    t_m.at( i + t_row_offset,  i + t_col_offset) -= tmp_i;
+    t_m.at( j + t_row_offset,  j + t_col_offset) -= tmp_j;
+    }
+  
+  if(i < t_n_elem)
+    {
+    t_m.at( i + t_row_offset,  i + t_col_offset) -= x_mem[i];
+    }
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+void
+diagview<eT>::operator%=(const Base<eT,T1>& o)
+  {
+  arma_extra_debug_sigprint();
+  
+  const unwrap<T1> tmp(o.get_ref());
+  const Mat<eT>& x = tmp.M;
+  
+  diagview<eT>& t = *this;
+  
+  arma_debug_check
+    (
+    ( (t.n_elem != x.n_elem) || (x.is_vec() == false) ),
+    "diagview: given object has incompatible size"
+    );
+  
+  Mat<eT>& t_m = *(t.m_ptr);
+  
+  const uword t_n_elem     = t.n_elem;
+  const uword t_row_offset = t.row_offset;
+  const uword t_col_offset = t.col_offset;
+  
+  const eT* x_mem = x.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < t_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = x_mem[i];
+    const eT tmp_j = x_mem[j];
+    
+    t_m.at( i + t_row_offset,  i + t_col_offset) *= tmp_i;
+    t_m.at( j + t_row_offset,  j + t_col_offset) *= tmp_j;
+    }
+  
+  if(i < t_n_elem)
+    {
+    t_m.at( i + t_row_offset,  i + t_col_offset) *= x_mem[i];
+    }
+  }
+
+
+
+template<typename eT>
+template<typename T1>
+inline
+void
+diagview<eT>::operator/=(const Base<eT,T1>& o)
+  {
+  arma_extra_debug_sigprint();
+  
+  const unwrap<T1> tmp(o.get_ref());
+  const Mat<eT>& x = tmp.M;
+  
+  diagview<eT>& t = *this;
+  
+  arma_debug_check
+    (
+    ( (t.n_elem != x.n_elem) || (x.is_vec() == false) ),
+    "diagview: given object has incompatible size"
+    );
+  
+  Mat<eT>& t_m = *(t.m_ptr);
+  
+  const uword t_n_elem     = t.n_elem;
+  const uword t_row_offset = t.row_offset;
+  const uword t_col_offset = t.col_offset;
+  
+  const eT* x_mem = x.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < t_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = x_mem[i];
+    const eT tmp_j = x_mem[j];
+    
+    t_m.at( i + t_row_offset,  i + t_col_offset) /= tmp_i;
+    t_m.at( j + t_row_offset,  j + t_col_offset) /= tmp_j;
+    }
+  
+  if(i < t_n_elem)
+    {
+    t_m.at( i + t_row_offset,  i + t_col_offset) /= x_mem[i];
+    }
+  }
+
+
+
+//! extract a diagonal and store it as a column vector
+template<typename eT>
+inline
+void
+diagview<eT>::extract(Mat<eT>& out, const diagview<eT>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  // NOTE: we're assuming that the matrix has already been set to the correct size and there is no aliasing;
+  // size setting and alias checking is done by either the Mat contructor or operator=()
+  
+  const Mat<eT>& in_m = in.m;
+  
+  const uword in_n_elem     = in.n_elem;
+  const uword in_row_offset = in.row_offset;
+  const uword in_col_offset = in.col_offset;
+  
+  eT* out_mem = out.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < in_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = in_m.at( i + in_row_offset, i + in_col_offset );
+    const eT tmp_j = in_m.at( j + in_row_offset, j + in_col_offset );
+    
+    out_mem[i] = tmp_i;
+    out_mem[j] = tmp_j;
+    }
+  
+  if(i < in_n_elem)
+    {
+    out_mem[i] = in_m.at( i + in_row_offset, i + in_col_offset );
+    }
+  }
+
+
+
+//! X += Y.diag()
+template<typename eT>
+inline
+void
+diagview<eT>::plus_inplace(Mat<eT>& out, const diagview<eT>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(out.n_rows, out.n_cols, in.n_rows, in.n_cols, "addition");
+  
+  const Mat<eT>& in_m = in.m;
+  
+  const uword in_n_elem     = in.n_elem;
+  const uword in_row_offset = in.row_offset;
+  const uword in_col_offset = in.col_offset;
+  
+  eT* out_mem = out.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < in_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = in_m.at( i + in_row_offset, i + in_col_offset );
+    const eT tmp_j = in_m.at( j + in_row_offset, j + in_col_offset );
+    
+    out_mem[i] += tmp_i;
+    out_mem[j] += tmp_j;
+    }
+  
+  if(i < in_n_elem)
+    {
+    out_mem[i] += in_m.at( i + in_row_offset, i + in_col_offset );
+    }
+  }
+
+
+
+//! X -= Y.diag()
+template<typename eT>
+inline
+void
+diagview<eT>::minus_inplace(Mat<eT>& out, const diagview<eT>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(out.n_rows, out.n_cols, in.n_rows, in.n_cols, "subtraction");
+  
+  const Mat<eT>& in_m = in.m;
+  
+  const uword in_n_elem     = in.n_elem;
+  const uword in_row_offset = in.row_offset;
+  const uword in_col_offset = in.col_offset;
+  
+  eT* out_mem = out.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < in_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = in_m.at( i + in_row_offset, i + in_col_offset );
+    const eT tmp_j = in_m.at( j + in_row_offset, j + in_col_offset );
+    
+    out_mem[i] -= tmp_i;
+    out_mem[j] -= tmp_j;
+    }
+  
+  if(i < in_n_elem)
+    {
+    out_mem[i] -= in_m.at( i + in_row_offset, i + in_col_offset );
+    }
+  }
+
+
+
+//! X %= Y.diag()
+template<typename eT>
+inline
+void
+diagview<eT>::schur_inplace(Mat<eT>& out, const diagview<eT>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(out.n_rows, out.n_cols, in.n_rows, in.n_cols, "element-wise multiplication");
+  
+  const Mat<eT>& in_m = in.m;
+  
+  const uword in_n_elem     = in.n_elem;
+  const uword in_row_offset = in.row_offset;
+  const uword in_col_offset = in.col_offset;
+  
+  eT* out_mem = out.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < in_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = in_m.at( i + in_row_offset, i + in_col_offset );
+    const eT tmp_j = in_m.at( j + in_row_offset, j + in_col_offset );
+    
+    out_mem[i] *= tmp_i;
+    out_mem[j] *= tmp_j;
+    }
+  
+  if(i < in_n_elem)
+    {
+    out_mem[i] *= in_m.at( i + in_row_offset, i + in_col_offset );
+    }
+  }
+
+
+
+//! X /= Y.diag()
+template<typename eT>
+inline
+void
+diagview<eT>::div_inplace(Mat<eT>& out, const diagview<eT>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(out.n_rows, out.n_cols, in.n_rows, in.n_cols, "element-wise division");
+  
+  const Mat<eT>& in_m = in.m;
+  
+  const uword in_n_elem     = in.n_elem;
+  const uword in_row_offset = in.row_offset;
+  const uword in_col_offset = in.col_offset;
+  
+  eT* out_mem = out.memptr();
+  
+  uword i,j;
+  for(i=0, j=1; j < in_n_elem; i+=2, j+=2)
+    {
+    const eT tmp_i = in_m.at( i + in_row_offset, i + in_col_offset );
+    const eT tmp_j = in_m.at( j + in_row_offset, j + in_col_offset );
+    
+    out_mem[i] /= tmp_i;
+    out_mem[j] /= tmp_j;
+    }
+  
+  if(i < in_n_elem)
+    {
+    out_mem[i] /= in_m.at( i + in_row_offset, i + in_col_offset );
+    }
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT&
+diagview<eT>::operator[](const uword i)
+  {
+  return (*m_ptr).at(i+row_offset, i+col_offset);
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT
+diagview<eT>::operator[](const uword i) const
+  {
+  return m.at(i+row_offset, i+col_offset);
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT&
+diagview<eT>::at(const uword i)
+  {
+  return (*m_ptr).at(i+row_offset, i+col_offset);
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT
+diagview<eT>::at(const uword i) const
+  {
+  return m.at(i+row_offset, i+col_offset);
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT&
+diagview<eT>::operator()(const uword i)
+  {
+  arma_debug_check( (i >= n_elem), "diagview::operator(): out of bounds" );
+  
+  return (*m_ptr).at(i+row_offset, i+col_offset);
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT
+diagview<eT>::operator()(const uword i) const
+  {
+  arma_debug_check( (i >= n_elem), "diagview::operator(): out of bounds" );
+  
+  return m.at(i+row_offset, i+col_offset);
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT&
+diagview<eT>::at(const uword row, const uword col)
+  {
+  return (*m_ptr).at(row+row_offset, row+col_offset);
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT
+diagview<eT>::at(const uword row, const uword col) const
+  {
+  return m.at(row+row_offset, row+col_offset);
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT&
+diagview<eT>::operator()(const uword row, const uword col)
+  {
+  arma_debug_check( ((row >= n_elem) || (col > 0)), "diagview::operator(): out of bounds" );
+  
+  return (*m_ptr).at(row+row_offset, row+col_offset);
+  }
+
+
+
+template<typename eT>
+arma_inline
+eT
+diagview<eT>::operator()(const uword row, const uword col) const
+  {
+  arma_debug_check( ((row >= n_elem) || (col > 0)), "diagview::operator(): out of bounds" );
+  
+  return m.at(row+row_offset, row+col_offset);
+  }
+
+
+
+template<typename eT>
+inline
+void
+diagview<eT>::fill(const eT val)
+  {
+  arma_extra_debug_sigprint();
+  
+  Mat<eT>& x = (*m_ptr);
+  
+  for(uword i=0; i<n_elem; ++i)
+    {
+    x.at(i+row_offset, i+col_offset) = val;
+    }
+  }
+
+
+
+template<typename eT>
+inline
+void
+diagview<eT>::zeros()
+  {
+  arma_extra_debug_sigprint();
+  
+  (*this).fill(eT(0));
+  }
+
+
+
+template<typename eT>
+inline
+void
+diagview<eT>::ones()
+  {
+  arma_extra_debug_sigprint();
+  
+  (*this).fill(eT(1));
+  }
+
+
+
+//! @}