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75 lines
2.7 KiB
75 lines
2.7 KiB
/*===========================================================================
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Copyright (C) 2007-2015 Yves Renard, Julien Pommier.
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This file is a part of GETFEM++
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Getfem++ is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version along with the GCC Runtime Library
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Exception either version 3.1 or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License and GCC Runtime Library Exception for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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===========================================================================*/
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// SQUARED_MATRIX_PARAM;
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// DENSE_VECTOR_PARAM;
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// VECTOR_PARAM;
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// ENDPARAM;
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#include "gmm/gmm_kernel.h"
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#include "gmm/gmm_dense_lu.h"
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#include "gmm/gmm_condition_number.h"
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using std::endl; using std::cout; using std::cerr;
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using std::ends; using std::cin;
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using gmm::size_type;
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bool print_debug = false;
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template <typename MAT1, typename VECT1, typename VECT2>
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bool test_procedure(const MAT1 &m1_, const VECT1 &v1_, const VECT2 &v2_) {
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VECT1 &v1 = const_cast<VECT1 &>(v1_);
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VECT2 &v2 = const_cast<VECT2 &>(v2_);
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MAT1 &m1 = const_cast<MAT1 &>(m1_);
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typedef typename gmm::linalg_traits<MAT1>::value_type T;
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typedef typename gmm::number_traits<T>::magnitude_type R;
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R prec = gmm::default_tol(R());
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static size_type nb_iter = 0;
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size_type m = gmm::mat_nrows(m1);
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std::vector<T> v3(m);
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R det = gmm::abs(gmm::lu_det(m1)), error;
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R cond = gmm::condition_number(m1);
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if (print_debug) cout << "cond = " << cond << " det = " << det << endl;
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GMM_ASSERT1(det != R(0) || cond >= R(0.01) / prec || cond == R(0),
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"Inconsistent condition number: " << cond);
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if (prec * cond < R(1)/R(10000) && det != R(0)) {
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++nb_iter;
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gmm::lu_solve(m1, v1, v2);
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gmm::mult(m1, v1, gmm::scaled(v2, T(-1)), v3);
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error = gmm::vect_norm2(v3);
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GMM_ASSERT1(error <= prec * cond * R(20000), "Error too large: " << error);
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gmm::lu_inverse(m1);
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gmm::mult(m1, v2, v1);
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gmm::lu_inverse(m1);
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gmm::mult(m1, v1, gmm::scaled(v2, T(-1)), v3);
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error = gmm::vect_norm2(v3);
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GMM_ASSERT1(error <= prec * cond * R(20000), "Error too large: " << error);
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if (nb_iter == 100) return true;
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}
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return false;
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}
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