Mercurial > octave
view liboctave/numeric/gsvd.h @ 32633:4b601ca024d5
maint: merge stable to default
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 22 Dec 2023 12:14:08 -0500 |
parents | ae4e19c0a2b1 2e484f9f1f18 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1997-2024 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" OCTAVE_BEGIN_NAMESPACE(octave) OCTAVE_BEGIN_NAMESPACE(math) template <typename T> class OCTAVE_API gsvd { public: enum class Type { std, economy, sigma_only }; gsvd () : 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 () = default; typename T::real_matrix_type singular_values_A () const { return m_sigmaA; } typename T::real_matrix_type singular_values_B () const { return m_sigmaB; } T left_singular_matrix_A () const; T left_singular_matrix_B () const; T right_singular_matrix () 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; }; OCTAVE_END_NAMESPACE(math) OCTAVE_END_NAMESPACE(octave) #endif