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/* eigenget.cpp
*
* Copyright (C) 2013 Jaron Kent-Dobias
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
// A utility which returns a given generalized eigenvector to the user.
#include "domain_energy.h"
#include "domain_eigen.h"
#include <unistd.h>
#include <stdio.h>
#include <iostream>
#include <stdlib.h>
#include <math.h>
#include <string>
// GSL includes.
#include <gsl/gsl_sf.h>
#include <gsl/gsl_math.h>
#include <gsl/gsl_complex.h>
#include <gsl/gsl_complex_math.h>
#include <gsl/gsl_vector.h>
#include <gsl/gsl_permutation.h>
#include <gsl/gsl_permute_vector.h>
#include <gsl/gsl_blas.h>
#include <gsl/gsl_linalg.h>
#include <gsl/gsl_sort_vector.h>
// Initializes the program.
int main(int argc, char *argv[]) {
int opt;
unsigned n, m, nn;
double c, d;
char *in_filename, *out_filename;
bool truehessian;
gsl_vector *z, *grad, *testgrad;
truehessian = false;
while ((opt = getopt(argc, argv, "n:m:c:i:o:td:")) != -1) {
switch (opt) {
case 'n':
n = atoi(optarg);
break;
case 'm':
m = atoi(optarg);
break;
case 'c':
c = atof(optarg);
break;
case 'd':
d = atof(optarg);
break;
case 'i':
in_filename = optarg;
break;
case 'o':
out_filename = optarg;
break;
case 't':
truehessian = true;
break;
default:
exit(EXIT_FAILURE);
}
}
if (truehessian) nn = 3 * n + 3;
else nn = 3 * n + 3;
z = gsl_vector_alloc(3 * n + 3);
grad = gsl_vector_alloc(nn);
testgrad = gsl_vector_alloc(nn);
FILE *in_file = fopen(in_filename, "r");
gsl_vector_fscanf(in_file, z);
fclose(in_file);
if (truehessian) domain_energy_fixedGradient(grad, n, z, c);
else domain_energy_fixedGradient(grad, n, z, c);
domain_energy_fixedGradient(testgrad, n, z, c);
FILE *out_file = fopen(out_filename, "w");
for (unsigned i = 0; i < nn; i++) {
fprintf(out_file, "%e\t", gsl_vector_get(grad, i) - gsl_vector_get(testgrad, i));
}
fclose(out_file);
}
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