Mercurial > octave
view liboctave/numeric/gsvd.h @ 31221:f5755dbacd8d
maint: merge stable to default
author | Pantxo Diribarne <pantxo.diribarne@gmail.com> |
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date | Wed, 31 Aug 2022 22:04:02 +0200 |
parents | 796f54d4ddbf |
children | e88a07dec498 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1997-2022 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // 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 OCTAVE_API gsvd { public: enum class Type { std, economy, sigma_only }; gsvd (void) : m_sigmaA (), m_sigmaB (), m_left_smA (), m_left_smB (), m_right_sm () { } gsvd (const T& a, const T& b, gsvd::Type gsvd_type = gsvd<T>::Type::std); gsvd (const gsvd& a) : m_type (a.m_type), m_sigmaA (a.m_sigmaA), m_sigmaB (a.m_sigmaB), m_left_smA (a.m_left_smA), m_left_smB (a.m_left_smB), m_right_sm (a.m_right_sm) { } gsvd& operator = (const gsvd& a) { if (this != &a) { m_type = a.m_type; m_sigmaA = a.m_sigmaA; m_sigmaB = a.m_sigmaB; m_left_smA = a.m_left_smA; m_left_smB = a.m_left_smB; m_right_sm = a.m_right_sm; } return *this; } ~gsvd (void) = default; typename T::real_matrix_type singular_values_A (void) const { return m_sigmaA; } typename T::real_matrix_type singular_values_B (void) const { return m_sigmaB; } T left_singular_matrix_A (void) const; T left_singular_matrix_B (void) const; T right_singular_matrix (void) const; private: typedef typename T::value_type P; typedef typename T::real_matrix_type real_matrix; 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, P *work, octave_f77_int_type lwork, octave_f77_int_type *iwork, octave_f77_int_type& info); //-------- gsvd::Type m_type; real_matrix m_sigmaA, m_sigmaB; T m_left_smA, m_left_smB; T m_right_sm; }; } } #endif