Mercurial > octave
view liboctave/numeric/gsvd.h @ 26376:00f796120a6d stable
maint: Update copyright dates in all source files.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 02 Jan 2019 16:32:43 -0500 |
parents | 6652d3823428 |
children | b442ec6dda5c |
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/* Copyright (C) 2016-2019 Barbara Lócsi Copyright (C) 2006 Pascal Dupuis <Pascal.Dupuis@uclouvain.be> Copyright (C) 1996, 1997 John W. Eaton This file is part of Octave. Octave is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <https://www.gnu.org/licenses/>. */ #if ! defined (octave_gsvd_h) #define octave_gsvd_h 1 #include "octave-config.h" namespace octave { namespace math { template <typename T> class gsvd { public: enum class Type { std, economy, sigma_only }; gsvd (void) : sigmaA (), sigmaB (), left_smA (), left_smB (), right_sm () { } gsvd (const T& a, const T& b, gsvd::Type gsvd_type = gsvd<T>::Type::economy); gsvd (const gsvd& a) : type (a.type), sigmaA (a.sigmaA), sigmaB (a.sigmaB), left_smA (a.left_smA), left_smB (a.left_smB), right_sm (a.right_sm), R(a.R) { } gsvd& operator = (const gsvd& a) { if (this != &a) { type = a.type; sigmaA = a.sigmaA; sigmaB = a.sigmaB; left_smA = a.left_smA; left_smB = a.left_smB; right_sm = a.right_sm; R = a.R; } return *this; } ~gsvd (void) = default; typename T::real_diag_matrix_type singular_values_A (void) const { return sigmaA; } typename T::real_diag_matrix_type singular_values_B (void) const { return sigmaB; } T left_singular_matrix_A (void) const; T left_singular_matrix_B (void) const; T right_singular_matrix (void) const; T R_matrix (void) const; private: typedef typename T::value_type P; typedef typename T::real_matrix_type real_matrix; gsvd::Type type; typename T::real_diag_matrix_type sigmaA, sigmaB; T left_smA, left_smB; T right_sm, R; void ggsvd (char& jobu, char& jobv, char& jobq, octave_f77_int_type m, octave_f77_int_type n, octave_f77_int_type p, octave_f77_int_type& k, octave_f77_int_type& l, P *tmp_dataA, octave_f77_int_type m1, P *tmp_dataB, octave_f77_int_type p1, real_matrix& alpha, real_matrix& beta, P *u, octave_f77_int_type nrow_u, P *v, octave_f77_int_type nrow_v, P *q, octave_f77_int_type nrow_q, T& work, octave_f77_int_type lwork, octave_f77_int_type *iwork, octave_f77_int_type& info); }; } } #endif