332 lines
7.4 KiB
C++
332 lines
7.4 KiB
C++
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// Copyright (C) 2011-2015 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 Gen
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//! @{
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template<typename T1, typename gen_type>
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arma_inline
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Gen<T1, gen_type>::Gen(const uword in_n_rows, const uword in_n_cols)
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: n_rows(in_n_rows)
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, n_cols(in_n_cols)
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{
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arma_extra_debug_sigprint();
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}
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template<typename T1, typename gen_type>
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arma_inline
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Gen<T1, gen_type>::~Gen()
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{
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arma_extra_debug_sigprint();
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}
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template<typename T1, typename gen_type>
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arma_inline
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typename T1::elem_type
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Gen<T1, gen_type>::generate()
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{
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_ones >::yes) { return eT(1); }
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else if(is_same_type<gen_type, gen_zeros>::yes) { return eT(0); }
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else if(is_same_type<gen_type, gen_randu>::yes) { return eT(arma_rng::randu<eT>()); }
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else if(is_same_type<gen_type, gen_randn>::yes) { return eT(arma_rng::randn<eT>()); }
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else { return eT(); }
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}
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template<typename T1, typename gen_type>
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arma_inline
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typename T1::elem_type
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Gen<T1, gen_type>::operator[](const uword ii) const
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{
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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return ((ii % n_rows) == (ii / n_rows)) ? eT(1) : eT(0);
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}
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else
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{
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return Gen<T1, gen_type>::generate();
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}
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}
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template<typename T1, typename gen_type>
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arma_inline
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typename T1::elem_type
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Gen<T1, gen_type>::at(const uword row, const uword col) const
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{
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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return (row == col) ? eT(1) : eT(0);
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}
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else
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{
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return Gen<T1, gen_type>::generate();
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}
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}
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template<typename T1, typename gen_type>
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arma_inline
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typename T1::elem_type
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Gen<T1, gen_type>::at_alt(const uword ii) const
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{
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return operator[](ii);
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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// NOTE: we're assuming that the matrix has already been set to the correct size;
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// this is done by either the Mat contructor or operator=()
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if(is_same_type<gen_type, gen_eye >::yes) { out.eye(); }
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else if(is_same_type<gen_type, gen_ones >::yes) { out.ones(); }
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else if(is_same_type<gen_type, gen_zeros>::yes) { out.zeros(); }
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else if(is_same_type<gen_type, gen_randu>::yes) { out.randu(); }
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else if(is_same_type<gen_type, gen_randn>::yes) { out.randn(); }
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply_inplace_plus(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "addition");
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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const uword N = (std::min)(n_rows, n_cols);
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for(uword iq=0; iq < N; ++iq)
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{
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out.at(iq,iq) += eT(1);
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}
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}
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else
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{
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eT* out_mem = out.memptr();
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const uword n_elem = out.n_elem;
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uword iq,jq;
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for(iq=0, jq=1; jq < n_elem; iq+=2, jq+=2)
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{
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const eT tmp_i = Gen<T1, gen_type>::generate();
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const eT tmp_j = Gen<T1, gen_type>::generate();
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out_mem[iq] += tmp_i;
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out_mem[jq] += tmp_j;
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}
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if(iq < n_elem)
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{
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out_mem[iq] += Gen<T1, gen_type>::generate();
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}
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}
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply_inplace_minus(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "subtraction");
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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const uword N = (std::min)(n_rows, n_cols);
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for(uword iq=0; iq < N; ++iq)
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{
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out.at(iq,iq) -= eT(1);
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}
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}
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else
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{
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eT* out_mem = out.memptr();
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const uword n_elem = out.n_elem;
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uword iq,jq;
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for(iq=0, jq=1; jq < n_elem; iq+=2, jq+=2)
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{
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const eT tmp_i = Gen<T1, gen_type>::generate();
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const eT tmp_j = Gen<T1, gen_type>::generate();
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out_mem[iq] -= tmp_i;
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out_mem[jq] -= tmp_j;
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}
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if(iq < n_elem)
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{
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out_mem[iq] -= Gen<T1, gen_type>::generate();
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}
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}
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply_inplace_schur(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "element-wise multiplication");
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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const uword N = (std::min)(n_rows, n_cols);
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for(uword iq=0; iq < N; ++iq)
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{
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for(uword row=0; row < iq; ++row) { out.at(row,iq) = eT(0); }
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for(uword row=iq+1; row < n_rows; ++row) { out.at(row,iq) = eT(0); }
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}
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}
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else
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{
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eT* out_mem = out.memptr();
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const uword n_elem = out.n_elem;
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uword iq,jq;
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for(iq=0, jq=1; jq < n_elem; iq+=2, jq+=2)
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{
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const eT tmp_i = Gen<T1, gen_type>::generate();
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const eT tmp_j = Gen<T1, gen_type>::generate();
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out_mem[iq] *= tmp_i;
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out_mem[jq] *= tmp_j;
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}
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if(iq < n_elem)
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{
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out_mem[iq] *= Gen<T1, gen_type>::generate();
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}
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}
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply_inplace_div(Mat<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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arma_debug_assert_same_size(out.n_rows, out.n_cols, n_rows, n_cols, "element-wise division");
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typedef typename T1::elem_type eT;
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if(is_same_type<gen_type, gen_eye>::yes)
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{
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const uword N = (std::min)(n_rows, n_cols);
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for(uword iq=0; iq < N; ++iq)
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{
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const eT zero = eT(0);
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for(uword row=0; row < iq; ++row) { out.at(row,iq) /= zero; }
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for(uword row=iq+1; row < n_rows; ++row) { out.at(row,iq) /= zero; }
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}
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}
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else
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{
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eT* out_mem = out.memptr();
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const uword n_elem = out.n_elem;
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uword iq,jq;
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for(iq=0, jq=1; jq < n_elem; iq+=2, jq+=2)
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{
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const eT tmp_i = Gen<T1, gen_type>::generate();
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const eT tmp_j = Gen<T1, gen_type>::generate();
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out_mem[iq] /= tmp_i;
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out_mem[jq] /= tmp_j;
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}
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if(iq < n_elem)
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{
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out_mem[iq] /= Gen<T1, gen_type>::generate();
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}
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}
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}
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template<typename T1, typename gen_type>
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inline
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void
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Gen<T1, gen_type>::apply(subview<typename T1::elem_type>& out) const
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{
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arma_extra_debug_sigprint();
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// NOTE: we're assuming that the submatrix has the same dimensions as the Gen object
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// this is checked by subview::operator=()
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if(is_same_type<gen_type, gen_eye >::yes) { out.eye(); }
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else if(is_same_type<gen_type, gen_ones >::yes) { out.ones(); }
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else if(is_same_type<gen_type, gen_zeros>::yes) { out.zeros(); }
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else if(is_same_type<gen_type, gen_randu>::yes) { out.randu(); }
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else if(is_same_type<gen_type, gen_randn>::yes) { out.randn(); }
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}
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//! @}
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