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

Armadillo Library

+// Copyright (C) 2009-2010 NICTA (www.nicta.com.au)
+// Copyright (C) 2009-2010 Conrad Sanderson
+// Copyright (C) 2009-2010 Dimitrios Bouzas
+// 
+// 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 glue_kron
+//! @{
+
+
+
+//! \brief
+//! both input matrices have the same element type
+template<typename eT>
+inline
+void
+glue_kron::direct_kron(Mat<eT>& out, const Mat<eT>& A, const Mat<eT>& B)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword A_rows = A.n_rows;
+  const uword A_cols = A.n_cols;
+  const uword B_rows = B.n_rows;
+  const uword B_cols = B.n_cols;
+  
+  out.set_size(A_rows*B_rows, A_cols*B_cols);
+  
+  for(uword i = 0; i < A_rows; i++)
+    {
+    for(uword j = 0; j < A_cols; j++)
+      {
+      out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A(i,j) * B; 
+      }
+    }  
+  }
+
+
+
+//! \brief
+//! different types of input matrices
+//! A -> complex, B -> basic element type
+template<typename T>
+inline
+void
+glue_kron::direct_kron(Mat< std::complex<T> >& out, const Mat< std::complex<T> >& A, const Mat<T>& B)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename std::complex<T> eT;
+  
+  const uword A_rows = A.n_rows;
+  const uword A_cols = A.n_cols;
+  const uword B_rows = B.n_rows;
+  const uword B_cols = B.n_cols;
+  
+  out.set_size(A_rows*B_rows, A_cols*B_cols);
+  
+  Mat<eT> tmp_B = conv_to< Mat<eT> >::from(B);
+  
+  for(uword i = 0; i < A_rows; i++)
+    {
+    for(uword j = 0; j < A_cols; j++)
+      {
+      out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A(i,j) * tmp_B; 
+      }
+    }  
+  }
+
+
+
+//! \brief
+//! different types of input matrices
+//! A -> basic element type, B -> complex
+template<typename T>
+inline
+void
+glue_kron::direct_kron(Mat< std::complex<T> >& out, const Mat<T>& A, const Mat< std::complex<T> >& B)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword A_rows = A.n_rows;
+  const uword A_cols = A.n_cols;
+  const uword B_rows = B.n_rows;
+  const uword B_cols = B.n_cols;
+  
+  out.set_size(A_rows*B_rows, A_cols*B_cols);
+  
+  for(uword i = 0; i < A_rows; i++)
+    {
+    for(uword j = 0; j < A_cols; j++)
+      {
+      out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A(i,j) * B; 
+      }
+    }  
+  }
+
+
+
+//! \brief
+//! apply Kronecker product for two objects with same element type
+template<typename T1, typename T2>
+inline
+void
+glue_kron::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_kron>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const unwrap_check<T1> A_tmp(X.A, out);
+  const unwrap_check<T2> B_tmp(X.B, out);
+  
+  const Mat<eT>& A = A_tmp.M;
+  const Mat<eT>& B = B_tmp.M;
+  
+  glue_kron::direct_kron(out, A, B); 
+  }
+
+
+
+//! @}