/* call-seq:
* matrix.max -> Float
*
* Returns the value of the maximum element in the matrix.
*/
VALUE cIGraph_matrix_max(VALUE self){
igraph_matrix_t *m;
Data_Get_Struct(self, igraph_matrix_t, m);
return rb_float_new(igraph_matrix_max(m));
}
int main() {
igraph_matrix_t mat;
igraph_sparsemat_t spmat, spmat2;
int i;
igraph_real_t m1, m2;
igraph_rng_seed(igraph_rng_default(), 42);
igraph_sparsemat_init(&spmat, DIM1, DIM2, 20);
igraph_sparsemat_entry(&spmat, 1, 2, -1.0);
igraph_sparsemat_entry(&spmat, 3, 2, 10.0);
for (i=0; i<10; i++) {
igraph_sparsemat_entry(&spmat, INT(DIM1-1), INT(DIM2-1), 1.0);
}
igraph_sparsemat_entry(&spmat, 1, 2, -1.0);
igraph_sparsemat_entry(&spmat, 3, 2, 10.0);
igraph_sparsemat_compress(&spmat, &spmat2);
igraph_matrix_init(&mat, 0, 0);
igraph_sparsemat_as_matrix(&mat, &spmat2);
m1=igraph_sparsemat_min(&spmat2);
m2=igraph_matrix_min(&mat);
if (m1 != m2) {
printf("%f %f\n", m1, m2);
return 1;
}
m1=igraph_sparsemat_max(&spmat2);
m2=igraph_matrix_max(&mat);
if (m1 != m2) {
printf("%f %f\n", m1, m2);
return 2;
}
igraph_sparsemat_minmax(&spmat2, &m1, &m2);
if (m1 != igraph_matrix_min(&mat)) { return 3; }
if (m2 != igraph_matrix_max(&mat)) { return 4; }
igraph_matrix_destroy(&mat);
igraph_sparsemat_destroy(&spmat);
igraph_sparsemat_destroy(&spmat2);
return 0;
}
double Matrix::max() const noexcept { return igraph_matrix_max(ptr()); }
