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Diffstat (limited to 'gsl-1.9/siman/test.c')
| -rw-r--r-- | gsl-1.9/siman/test.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/gsl-1.9/siman/test.c b/gsl-1.9/siman/test.c new file mode 100644 index 0000000..95c9570 --- /dev/null +++ b/gsl-1.9/siman/test.c @@ -0,0 +1,162 @@ +/* siman/test.c + * + * Copyright (C) 1996, 1997, 1998, 1999, 2000 Mark Galassi + * + * 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 <stdlib.h> +#include <string.h> +#include <math.h> +#include <gsl/gsl_test.h> +#include <gsl/gsl_rng.h> +#include <gsl/gsl_siman.h> +#include <gsl/gsl_ieee_utils.h> +#include <stdio.h> + +/* set up parameters for this simulated annealing run */ +#define N_TRIES 200 /* how many points do we try before stepping */ +#define ITERS_FIXED_T 1000 /* how many iterations for each T? */ +#define STEP_SIZE 1.0 /* max step size in random walk */ +#define K 1.0 /* Boltzmann constant */ +#define T_INITIAL 0.008 /* initial temperature */ +#define MU_T 1.003 /* damping factor for temperature */ +#define T_MIN 2.0e-6 + +gsl_siman_params_t params = {N_TRIES, ITERS_FIXED_T, STEP_SIZE, + K, T_INITIAL, MU_T, T_MIN}; + +double square (double x) ; +double square (double x) { return x * x ; } + +double E1(void *xp); +double M1(void *xp, void *yp); +void S1(const gsl_rng * r, void *xp, double step_size); +void P1(void *xp); + +/* now some functions to test in one dimension */ +double E1(void *xp) +{ + double x = * ((double *) xp); + + return exp(-square(x-1))*sin(8*x) - exp(-square(x-1000))*0.89; +} + +double M1(void *xp, void *yp) +{ + double x = *((double *) xp); + double y = *((double *) yp); + + return fabs(x - y); +} + +void S1(const gsl_rng * r, void *xp, double step_size) +{ + double old_x = *((double *) xp); + double new_x; + + new_x = gsl_rng_uniform(r)*2*step_size - step_size + old_x; + + memcpy(xp, &new_x, sizeof(new_x)); +} + +void P1(void *xp) +{ + printf(" %12g ", *((double *) xp)); +} + +int main(void) +{ + double x_min = 1.36312999455315182 ; + double x ; + + gsl_rng * r = gsl_rng_alloc (gsl_rng_env_setup()) ; + + gsl_ieee_env_setup (); + + /* The function tested here has multiple mimima. + The global minimum is at x = 1.36312999, (f = -0.87287) + There is a local minimum at x = 0.60146196, (f = -0.84893) */ + + x = -10.0 ; + gsl_siman_solve(r, &x, E1, S1, M1, NULL, NULL, NULL, NULL, + sizeof(double), params); + gsl_test_rel(x, x_min, 1e-3, "f(x)= exp(-(x-1)^2) sin(8x), x0=-10") ; + + x = +10.0 ; + gsl_siman_solve(r, &x, E1, S1, M1, NULL, NULL, NULL, NULL, + sizeof(double), params); + gsl_test_rel(x, x_min, 1e-3, "f(x)= exp(-(x-1)^2) sin(8x), x0=10") ; + + /* Start at the false minimum */ + + x = +0.6 ; + gsl_siman_solve(r, &x, E1, S1, M1, NULL, NULL, NULL, NULL, + sizeof(double), params); + gsl_test_rel(x, x_min, 1e-3, "f(x)= exp(-(x-1)^2) sin(8x), x0=0.6") ; + + x = +0.5 ; + gsl_siman_solve(r, &x, E1, S1, M1, NULL, NULL, NULL, NULL, + sizeof(double), params); + gsl_test_rel(x, x_min, 1e-3, "f(x)= exp(-(x-1)^2) sin(8x), x0=0.5") ; + + x = +0.4 ; + gsl_siman_solve(r, &x, E1, S1, M1, NULL, NULL, NULL, NULL, + sizeof(double), params); + gsl_test_rel(x, x_min, 1e-3, "f(x)= exp(-(x-1)^2) sin(8x), x0=0.4") ; + + gsl_rng_free(r); + exit (gsl_test_summary ()); + +#ifdef JUNK + x0.D1 = 12.0; + printf("#one dimensional problem, x0 = %f\n", x0.D1); + gsl_siman_Usolve(r, &x0, test_E_1D, test_step_1D, distance_1D, + print_pos_1D, params); + + + x0.D2[0] = 12.0; + x0.D2[1] = 5.5; + printf("#two dimensional problem, (x0,y0) = (%f,%f)\n", + x0.D2[0], x0.D2[1]); + gsl_siman_Usolve(r, &x0, test_E_2D, test_step_2D, distance_2D, + print_pos_2D, params); + + x0.D3[0] = 12.2; + x0.D3[1] = 5.5; + x0.D3[2] = -15.5; + printf("#three dimensional problem, (x0,y0,z0) = (%f,%f,%f)\n", + x0.D3[0], x0.D3[1], x0.D3[2]); + gsl_siman_Usolve(r, &x0, test_E_3D, test_step_3D, distance_3D, + print_pos_3D, params); + + x0.D2[0] = 12.2; + x0.D2[1] = 5.5; + + gsl_siman_solve(r, &x0, test_E_2D, test_step_2D, distance_2D, print_pos_2D, params); + + x0.D3[0] = 12.2; + x0.D3[1] = 5.5; + x0.D3[2] = -15.5; + + gsl_siman_solve(r, &x0, test_E_3D, test_step_3D, distance_3D, print_pos_3D, params); + + return 0; +#endif +} + + + |