66 lines
1.5 KiB
C++
66 lines
1.5 KiB
C++
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// Copyright (C) 2010-2013 National ICT Australia (NICTA)
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// -------------------------------------------------------------------
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//
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// Written by Conrad Sanderson - http://conradsanderson.id.au
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//! \addtogroup glue_toeplitz
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//! @{
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template<typename T1, typename T2>
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inline
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void
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glue_toeplitz::apply(Mat<typename T1::elem_type>& out, const Glue<T1, T2, glue_toeplitz>& in)
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{
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arma_extra_debug_sigprint();
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typedef typename T1::elem_type eT;
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const unwrap_check<T1> tmp1(in.A, out);
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const unwrap_check<T2> tmp2(in.B, out);
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const Mat<eT>& A = tmp1.M;
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const Mat<eT>& B = tmp2.M;
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arma_debug_check
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(
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( ((A.is_vec() == false) && (A.is_empty() == false)) || ((B.is_vec() == false) && (B.is_empty() == false)) ),
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"toeplitz(): given object is not a vector"
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);
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const uword A_N = A.n_elem;
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const uword B_N = B.n_elem;
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const eT* A_mem = A.memptr();
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const eT* B_mem = B.memptr();
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out.set_size(A_N, B_N);
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if( out.is_empty() ) { return; }
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for(uword col=0; col < B_N; ++col)
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{
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eT* col_mem = out.colptr(col);
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uword i = 0;
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for(uword row=col; row < A_N; ++row, ++i) { col_mem[row] = A_mem[i]; }
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}
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for(uword row=0; row < A_N; ++row)
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{
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uword i = 1;
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for(uword col=(row+1); col < B_N; ++col, ++i) { out.at(row,col) = B_mem[i]; }
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}
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}
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//! @}
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