2 #include <gsl/gsl_matrix.h>
8 gsl_matrix * m = gsl_matrix_alloc (100, 100);
9 gsl_matrix * a = gsl_matrix_alloc (100, 100);
11 for (i = 0; i < 100; i++)
12 for (j = 0; j < 100; j++)
13 gsl_matrix_set (m, i, j, 0.23 + i + j);
16 FILE * f = fopen ("test.dat", "wb");
17 gsl_matrix_fwrite (f, m);
22 FILE * f = fopen ("test.dat", "rb");
23 gsl_matrix_fread (f, a);
27 for (i = 0; i < 100; i++)
28 for (j = 0; j < 100; j++)
30 double mij = gsl_matrix_get (m, i, j);
31 double aij = gsl_matrix_get (a, i, j);
38 printf ("differences = %d (should be zero)\n", k);