Chris@49: // Copyright (C) 2009-2010 NICTA (www.nicta.com.au)
Chris@49: // Copyright (C) 2009-2010 Conrad Sanderson
Chris@49: // Copyright (C) 2009-2010 Dimitrios Bouzas
Chris@49: // 
Chris@49: // This Source Code Form is subject to the terms of the Mozilla Public
Chris@49: // License, v. 2.0. If a copy of the MPL was not distributed with this
Chris@49: // file, You can obtain one at http://mozilla.org/MPL/2.0/.
Chris@49: 
Chris@49: 
Chris@49: //! \addtogroup glue_kron
Chris@49: //! @{
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! \brief
Chris@49: //! both input matrices have the same element type
Chris@49: template<typename eT>
Chris@49: inline
Chris@49: void
Chris@49: glue_kron::direct_kron(Mat<eT>& out, const Mat<eT>& A, const Mat<eT>& B)
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   
Chris@49:   const uword A_rows = A.n_rows;
Chris@49:   const uword A_cols = A.n_cols;
Chris@49:   const uword B_rows = B.n_rows;
Chris@49:   const uword B_cols = B.n_cols;
Chris@49:   
Chris@49:   out.set_size(A_rows*B_rows, A_cols*B_cols);
Chris@49:   
Chris@49:   for(uword i = 0; i < A_rows; i++)
Chris@49:     {
Chris@49:     for(uword j = 0; j < A_cols; j++)
Chris@49:       {
Chris@49:       out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A(i,j) * B; 
Chris@49:       }
Chris@49:     }  
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! \brief
Chris@49: //! different types of input matrices
Chris@49: //! A -> complex, B -> basic element type
Chris@49: template<typename T>
Chris@49: inline
Chris@49: void
Chris@49: glue_kron::direct_kron(Mat< std::complex<T> >& out, const Mat< std::complex<T> >& A, const Mat<T>& B)
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   
Chris@49:   typedef typename std::complex<T> eT;
Chris@49:   
Chris@49:   const uword A_rows = A.n_rows;
Chris@49:   const uword A_cols = A.n_cols;
Chris@49:   const uword B_rows = B.n_rows;
Chris@49:   const uword B_cols = B.n_cols;
Chris@49:   
Chris@49:   out.set_size(A_rows*B_rows, A_cols*B_cols);
Chris@49:   
Chris@49:   Mat<eT> tmp_B = conv_to< Mat<eT> >::from(B);
Chris@49:   
Chris@49:   for(uword i = 0; i < A_rows; i++)
Chris@49:     {
Chris@49:     for(uword j = 0; j < A_cols; j++)
Chris@49:       {
Chris@49:       out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A(i,j) * tmp_B; 
Chris@49:       }
Chris@49:     }  
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! \brief
Chris@49: //! different types of input matrices
Chris@49: //! A -> basic element type, B -> complex
Chris@49: template<typename T>
Chris@49: inline
Chris@49: void
Chris@49: glue_kron::direct_kron(Mat< std::complex<T> >& out, const Mat<T>& A, const Mat< std::complex<T> >& B)
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   
Chris@49:   const uword A_rows = A.n_rows;
Chris@49:   const uword A_cols = A.n_cols;
Chris@49:   const uword B_rows = B.n_rows;
Chris@49:   const uword B_cols = B.n_cols;
Chris@49:   
Chris@49:   out.set_size(A_rows*B_rows, A_cols*B_cols);
Chris@49:   
Chris@49:   for(uword i = 0; i < A_rows; i++)
Chris@49:     {
Chris@49:     for(uword j = 0; j < A_cols; j++)
Chris@49:       {
Chris@49:       out.submat(i*B_rows, j*B_cols, (i+1)*B_rows-1, (j+1)*B_cols-1) = A(i,j) * B; 
Chris@49:       }
Chris@49:     }  
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! \brief
Chris@49: //! apply Kronecker product for two objects with same element type
Chris@49: template<typename T1, typename T2>
Chris@49: inline
Chris@49: void
Chris@49: glue_kron::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_kron>& X)
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   
Chris@49:   typedef typename T1::elem_type eT;
Chris@49:   
Chris@49:   const unwrap_check<T1> A_tmp(X.A, out);
Chris@49:   const unwrap_check<T2> B_tmp(X.B, out);
Chris@49:   
Chris@49:   const Mat<eT>& A = A_tmp.M;
Chris@49:   const Mat<eT>& B = B_tmp.M;
Chris@49:   
Chris@49:   glue_kron::direct_kron(out, A, B); 
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! @}