| /* multimin/convergence.c |
| * |
| * Copyright (C) 1996, 1997, 1998, 1999, 2000 Fabrice Rossi |
| * |
| * This program 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 2 of the License, or (at |
| * your option) any later version. |
| * |
| * This program 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 this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #include <config.h> |
| #include <gsl/gsl_multimin.h> |
| #include <gsl/gsl_blas.h> |
| |
| int |
| gsl_multimin_test_gradient (const gsl_vector *g, double epsabs) |
| { |
| double norm; |
| |
| if (epsabs < 0.0) |
| { |
| GSL_ERROR ("absolute tolerance is negative", GSL_EBADTOL); |
| } |
| |
| norm = gsl_blas_dnrm2(g); |
| |
| if (norm < epsabs) |
| { |
| return GSL_SUCCESS; |
| } |
| |
| return GSL_CONTINUE; |
| } |
| |
| int |
| gsl_multimin_test_size (const double size, double epsabs) |
| { |
| if (epsabs < 0.0) |
| { |
| GSL_ERROR ("absolute tolerance is negative", GSL_EBADTOL); |
| } |
| |
| if (size < epsabs) |
| { |
| return GSL_SUCCESS; |
| } |
| |
| return GSL_CONTINUE; |
| } |
