103 lines
2.3 KiB
C++
103 lines
2.3 KiB
C++
// Copyright (C) 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 op_toeplitz
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//! @{
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template<typename T1>
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inline
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void
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op_toeplitz::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_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> tmp(in.m, out);
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const Mat<eT>& X = tmp.M;
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arma_debug_check( ((X.is_vec() == false) && (X.is_empty() == false)), "toeplitz(): given object is not a vector" );
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const uword N = X.n_elem;
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const eT* X_mem = X.memptr();
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out.set_size(N,N);
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for(uword col=0; col < N; ++col)
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{
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eT* col_mem = out.colptr(col);
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uword i;
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i = col;
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for(uword row=0; row < col; ++row, --i) { col_mem[row] = X_mem[i]; }
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i = 0;
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for(uword row=col; row < N; ++row, ++i) { col_mem[row] = X_mem[i]; }
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}
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}
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template<typename T1>
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inline
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void
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op_toeplitz_c::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_toeplitz_c>& 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> tmp(in.m, out);
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const Mat<eT>& X = tmp.M;
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arma_debug_check( ((X.is_vec() == false) && (X.is_empty() == false)), "circ_toeplitz(): given object is not a vector" );
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const uword N = X.n_elem;
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const eT* X_mem = X.memptr();
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out.set_size(N,N);
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if(X.is_rowvec() == true)
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{
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for(uword row=0; row < N; ++row)
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{
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uword i;
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i = row;
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for(uword col=0; col < row; ++col, --i) { out.at(row,col) = X_mem[N-i]; }
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i = 0;
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for(uword col=row; col < N; ++col, ++i) { out.at(row,col) = X_mem[i]; }
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}
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}
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else
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{
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for(uword col=0; col < N; ++col)
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{
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eT* col_mem = out.colptr(col);
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uword i;
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i = col;
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for(uword row=0; row < col; ++row, --i) { col_mem[row] = X_mem[N-i]; }
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i = 0;
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for(uword row=col; row < N; ++row, ++i) { col_mem[row] = X_mem[i]; }
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}
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}
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}
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//! @}
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