Mercurial > hg > segmenter-vamp-plugin
view armadillo-3.900.4/include/armadillo_bits/fn_solve.hpp @ 84:55a047986812 tip
Update library URI so as not to be document-local
author | Chris Cannam |
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date | Wed, 22 Apr 2020 14:21:57 +0100 |
parents | 1ec0e2823891 |
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// Copyright (C) 2009-2011 NICTA (www.nicta.com.au) // Copyright (C) 2009-2011 Conrad Sanderson // // This Source Code Form is subject to the terms of the Mozilla Public // License, v. 2.0. If a copy of the MPL was not distributed with this // file, You can obtain one at http://mozilla.org/MPL/2.0/. //! \addtogroup fn_solve //! @{ //! Solve a system of linear equations, i.e., A*X = B, where X is unknown. //! For a square matrix A, this function is conceptually the same as X = inv(A)*B, //! but is done more efficiently. //! The number of rows in A and B must be the same. //! B can be either a column vector or a matrix. //! This function will also try to provide approximate solutions //! to under-determined as well as over-determined systems (non-square A matrices). template<typename T1, typename T2> inline const Glue<T1, T2, glue_solve> solve ( const Base<typename T1::elem_type,T1>& A, const Base<typename T1::elem_type,T2>& B, const bool slow = false, const typename arma_blas_type_only<typename T1::elem_type>::result* junk = 0 ) { arma_extra_debug_sigprint(); arma_ignore(junk); return Glue<T1, T2, glue_solve>(A.get_ref(), B.get_ref(), ((slow == false) ? 0 : 1) ); } template<typename T1, typename T2> inline const Glue<T1, T2, glue_solve_tr> solve ( const Op<T1, op_trimat>& A, const Base<typename T1::elem_type,T2>& B, const bool slow = false, const typename arma_blas_type_only<typename T1::elem_type>::result* junk = 0 ) { arma_extra_debug_sigprint(); arma_ignore(slow); arma_ignore(junk); return Glue<T1, T2, glue_solve_tr>(A.m, B.get_ref(), A.aux_uword_a); } template<typename T1, typename T2> inline bool solve ( Mat<typename T1::elem_type>& out, const Base<typename T1::elem_type,T1>& A, const Base<typename T1::elem_type,T2>& B, const bool slow = false, const typename arma_blas_type_only<typename T1::elem_type>::result* junk = 0 ) { arma_extra_debug_sigprint(); arma_ignore(junk); try { out = solve( A.get_ref(), B.get_ref(), slow ); } catch(std::runtime_error&) { return false; } return true; } //! @}