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

Armadillo Library

+// Copyright (C) 2011 NICTA (www.nicta.com.au)
+// Copyright (C) 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 Gen
+//! @{
+
+
+
+template<typename eT, typename gen_type>
+arma_inline
+Gen<eT, gen_type>::Gen(const uword in_n_rows, const uword in_n_cols)
+  : n_rows(in_n_rows)
+  , n_cols(in_n_cols)
+  {
+  arma_extra_debug_sigprint();
+  }
+
+
+
+template<typename eT, typename gen_type>
+arma_inline
+Gen<eT, gen_type>::~Gen()
+  {
+  arma_extra_debug_sigprint();
+  }
+
+
+
+template<typename eT, typename gen_type>
+arma_inline
+eT
+Gen<eT, gen_type>::generate()
+  {
+       if(is_same_type<gen_type, gen_ones_full>::value == true) { return eT(1);                   }
+  else if(is_same_type<gen_type, gen_zeros    >::value == true) { return eT(0);                   }
+  else if(is_same_type<gen_type, gen_randu    >::value == true) { return eT(eop_aux_randu<eT>()); }
+  else if(is_same_type<gen_type, gen_randn    >::value == true) { return eT(eop_aux_randn<eT>()); }
+  else                                                          { return eT();                    }
+  }
+
+
+
+template<typename eT, typename gen_type>
+arma_inline
+eT
+Gen<eT, gen_type>::operator[](const uword i) const
+  {
+  if(is_same_type<gen_type, gen_ones_diag>::value == true)
+    {
+    return ((i % n_rows) == (i / n_rows)) ? eT(1) : eT(0);
+    }
+  else
+    {
+    return Gen<eT, gen_type>::generate();
+    }
+  }
+
+
+
+template<typename eT, typename gen_type>
+arma_inline
+eT
+Gen<eT, gen_type>::at(const uword row, const uword col) const
+  {
+  if(is_same_type<gen_type, gen_ones_diag>::value == true)
+    {
+    return (row == col) ? eT(1) : eT(0);
+    }
+  else
+    {
+    return Gen<eT, gen_type>::generate();
+    }
+  }
+
+
+
+template<typename eT, typename gen_type>
+inline
+void
+Gen<eT, gen_type>::apply(Mat<eT>& out) const
+  {
+  arma_extra_debug_sigprint();
+  
+  // NOTE: we're assuming that the matrix has already been set to the correct size;
+  // this is done by either the Mat contructor or operator=()
+  
+       if(is_same_type<gen_type, gen_ones_diag>::value == true) { out.eye();   }
+  else if(is_same_type<gen_type, gen_ones_full>::value == true) { out.ones();  }
+  else if(is_same_type<gen_type, gen_zeros    >::value == true) { out.zeros(); }
+  else if(is_same_type<gen_type, gen_randu    >::value == true) { out.randu(); }
+  else if(is_same_type<gen_type, gen_randn    >::value == true) { out.randn(); }
+  }
+
+
+
+template<typename eT, typename gen_type>
+inline
+void
+Gen<eT, gen_type>::apply_inplace_plus(Mat<eT>& out) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "addition");
+  
+  
+  if(is_same_type<gen_type, gen_ones_diag>::value == true)
+    {
+    const uword N = (std::min)(n_rows, n_cols);
+    
+    for(uword i=0; i<N; ++i)
+      {
+      out.at(i,i) += eT(1);
+      }
+    }
+  else
+    {
+          eT*   out_mem = out.memptr();
+    const uword n_elem  = out.n_elem;
+    
+    uword i,j;
+    
+    for(i=0, j=1; j<n_elem; i+=2, j+=2)
+      {
+      const eT tmp_i = Gen<eT, gen_type>::generate();
+      const eT tmp_j = Gen<eT, gen_type>::generate();
+      
+      out_mem[i] += tmp_i;
+      out_mem[j] += tmp_j;
+      }
+    
+    if(i < n_elem)
+      {
+      out_mem[i] += Gen<eT, gen_type>::generate();
+      }
+    }
+  
+  }
+
+
+
+
+template<typename eT, typename gen_type>
+inline
+void
+Gen<eT, gen_type>::apply_inplace_minus(Mat<eT>& out) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "subtraction");
+  
+  
+  if(is_same_type<gen_type, gen_ones_diag>::value == true)
+    {
+    const uword N = (std::min)(n_rows, n_cols);
+    
+    for(uword i=0; i<N; ++i)
+      {
+      out.at(i,i) -= eT(1);
+      }
+    }
+  else
+    {
+          eT*   out_mem = out.memptr();
+    const uword n_elem  = out.n_elem;
+    
+    uword i,j;
+    
+    for(i=0, j=1; j<n_elem; i+=2, j+=2)
+      {
+      const eT tmp_i = Gen<eT, gen_type>::generate();
+      const eT tmp_j = Gen<eT, gen_type>::generate();
+      
+      out_mem[i] -= tmp_i;
+      out_mem[j] -= tmp_j;
+      }
+    
+    if(i < n_elem)
+      {
+      out_mem[i] -= Gen<eT, gen_type>::generate();
+      }
+    }
+  
+  }
+
+
+
+
+template<typename eT, typename gen_type>
+inline
+void
+Gen<eT, gen_type>::apply_inplace_schur(Mat<eT>& out) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "element-wise multiplication");
+  
+  
+  if(is_same_type<gen_type, gen_ones_diag>::value == true)
+    {
+    const uword N = (std::min)(n_rows, n_cols);
+    
+    for(uword i=0; i<N; ++i)
+      {
+      for(uword row=0;   row<i;      ++row) { out.at(row,i) = eT(0); }
+      for(uword row=i+1; row<n_rows; ++row) { out.at(row,i) = eT(0); }
+      }
+    }
+  else
+    {
+          eT*   out_mem = out.memptr();
+    const uword n_elem  = out.n_elem;
+    
+    uword i,j;
+    
+    for(i=0, j=1; j<n_elem; i+=2, j+=2)
+      {
+      const eT tmp_i = Gen<eT, gen_type>::generate();
+      const eT tmp_j = Gen<eT, gen_type>::generate();
+      
+      out_mem[i] *= tmp_i;
+      out_mem[j] *= tmp_j;
+      }
+    
+    if(i < n_elem)
+      {
+      out_mem[i] *= Gen<eT, gen_type>::generate();
+      }
+    }
+  
+  }
+
+
+
+
+template<typename eT, typename gen_type>
+inline
+void
+Gen<eT, gen_type>::apply_inplace_div(Mat<eT>& out) const
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "element-wise division");
+  
+  
+  if(is_same_type<gen_type, gen_ones_diag>::value == true)
+    {
+    const uword N = (std::min)(n_rows, n_cols);
+    
+    for(uword i=0; i<N; ++i)
+      {
+      const eT zero = eT(0);
+      
+      for(uword row=0;   row<i;      ++row) { out.at(row,i) /= zero; }
+      for(uword row=i+1; row<n_rows; ++row) { out.at(row,i) /= zero; }
+      }
+    }
+  else
+    {
+          eT*   out_mem = out.memptr();
+    const uword n_elem  = out.n_elem;
+    
+    uword i,j;
+    
+    for(i=0, j=1; j<n_elem; i+=2, j+=2)
+      {
+      const eT tmp_i = Gen<eT, gen_type>::generate();
+      const eT tmp_j = Gen<eT, gen_type>::generate();
+      
+      out_mem[i] /= tmp_i;
+      out_mem[j] /= tmp_j;
+      }
+    
+    if(i < n_elem)
+      {
+      out_mem[i] /= Gen<eT, gen_type>::generate();
+      }
+    }
+  
+  }
+
+
+
+
+//! @}