comparison armadillo-2.4.4/include/armadillo_bits/fn_kron.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 fn_kron
+//! @{
+
+
+
+//! \brief
+//! kronecker product of two matrices,
+//! with the matrices having the same element type
+template<typename T1, typename T2>
+arma_inline
+const Glue<T1,T2,glue_kron>
+kron(const Base<typename T1::elem_type,T1>& A, const Base<typename T1::elem_type,T2>& B)
+  {
+  arma_extra_debug_sigprint();
+
+  return Glue<T1, T2, glue_kron>(A.get_ref(), B.get_ref());
+  }
+
+
+
+//! \brief
+//! kronecker product of two matrices,
+//! with the matrices having different element types
+template<typename T, typename T1, typename T2>
+inline
+Mat<typename eT_promoter<T1,T2>::eT>
+kron(const Base<std::complex<T>,T1>& X, const Base<T,T2>& Y)
+  {
+  arma_extra_debug_sigprint();
+
+  typedef typename std::complex<T> eT1;
+
+  promote_type<eT1,T>::check();
+  
+  const unwrap<T1> tmp1(X.get_ref());
+  const unwrap<T2> tmp2(Y.get_ref());
+  
+  const Mat<eT1>& A = tmp1.M;
+  const Mat<T  >& B = tmp2.M;
+
+  Mat<eT1> out;
+  
+  glue_kron::direct_kron(out, A, B);
+  
+  return out;
+  }
+
+
+
+//! \brief
+//! kronecker product of two matrices,
+//! with the matrices having different element types
+template<typename T, typename T1, typename T2>
+inline
+Mat<typename eT_promoter<T1,T2>::eT>
+kron(const Base<T,T1>& X, const Base<std::complex<T>,T2>& Y)
+  {
+  arma_extra_debug_sigprint();
+
+  typedef typename std::complex<T> eT2;  
+
+  promote_type<T,eT2>::check();
+  
+  const unwrap<T1> tmp1(X.get_ref());
+  const unwrap<T2> tmp2(Y.get_ref());
+  
+  const Mat<T  >& A = tmp1.M;
+  const Mat<eT2>& B = tmp2.M;
+
+  Mat<eT2> out;
+  
+  glue_kron::direct_kron(out, A, B);
+  
+  return out;
+  }
+
+
+
+//! @}