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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2009-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard st, Cambridge MA, 02139 USA
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 <igraph.h>
#include <igraph_sparsemat.h>
int main() {
igraph_sparsemat_t A, B, C, D;
igraph_t G, H;
igraph_vector_t vect;
long int i;
/* Create, compress, destroy */
igraph_sparsemat_init(&A, 100, 20, 50);
igraph_sparsemat_compress(&A, &B);
igraph_sparsemat_destroy(&B);
igraph_sparsemat_destroy(&A);
/* Convert a ring graph to a matrix, print it, compress, print again */
#define VC 10
igraph_ring(&G, VC, /*directed=*/ 0, /*mutual=*/ 0, /*circular=*/ 1);
igraph_get_sparsemat(&G, &A);
igraph_destroy(&G);
igraph_sparsemat_compress(&A, &B);
igraph_sparsemat_print(&A, stdout);
igraph_sparsemat_print(&B, stdout);
/* Basic query, nrow, ncol, type, is_triplet, is_cc */
if (igraph_sparsemat_nrow(&A) != VC ||
igraph_sparsemat_ncol(&A) != VC ||
igraph_sparsemat_nrow(&B) != VC ||
igraph_sparsemat_ncol(&B) != VC) {
return 1;
}
if (!igraph_sparsemat_is_triplet(&A)) { return 2; }
if (!igraph_sparsemat_is_cc(&B)) { return 3; }
if (igraph_sparsemat_type(&A) != IGRAPH_SPARSEMAT_TRIPLET) { return 4; }
if (igraph_sparsemat_type(&B) != IGRAPH_SPARSEMAT_CC) { return 5; }
igraph_sparsemat_destroy(&A);
igraph_sparsemat_destroy(&B);
#undef VC
printf("------------------------\n");
/* Create unit matrices */
igraph_sparsemat_eye(&A, /*n=*/ 5, /*nzmax=*/ 5, /*value=*/ 1.0,
/*compress=*/ 0);
igraph_sparsemat_eye(&B, /*n=*/ 5, /*nzmax=*/ 5, /*value=*/ 1.0,
/*compress=*/ 1);
igraph_sparsemat_print(&A, stdout);
igraph_sparsemat_print(&B, stdout);
igraph_sparsemat_destroy(&A);
igraph_sparsemat_destroy(&B);
printf("------------------------\n");
/* Create diagonal matrices */
igraph_vector_init(&vect, 5);
for (i=0; i<5; i++) { VECTOR(vect)[i] = i; }
igraph_sparsemat_diag(&A, /*nzmax=*/ 5, /*values=*/ &vect, /*compress=*/ 0);
igraph_sparsemat_diag(&B, /*nzmax=*/ 5, /*values=*/ &vect, /*compress=*/ 1);
igraph_vector_destroy(&vect);
igraph_sparsemat_print(&A, stdout);
igraph_sparsemat_print(&B, stdout);
igraph_sparsemat_destroy(&A);
igraph_sparsemat_destroy(&B);
printf("------------------------\n");
/* Transpose matrices */
igraph_tree(&G, 10, /*children=*/ 2, IGRAPH_TREE_OUT);
igraph_get_sparsemat(&G, &A);
igraph_destroy(&G);
igraph_sparsemat_compress(&A, &B);
igraph_sparsemat_print(&B, stdout);
igraph_sparsemat_transpose(&B, &C, /*values=*/ 1);
igraph_sparsemat_print(&C, stdout);
igraph_sparsemat_destroy(&A);
igraph_sparsemat_destroy(&B);
igraph_sparsemat_destroy(&C);
printf("------------------------\n");
/* Add duplicate elements */
igraph_sparsemat_init(&A, 10, 10, /*nzmax=*/ 20);
for (i=1; i<10; i++) {
igraph_sparsemat_entry(&A, 0, i, 1.0);
}
for (i=1; i<10; i++) {
igraph_sparsemat_entry(&A, 0, i, 1.0);
}
igraph_sparsemat_print(&A, stdout);
igraph_sparsemat_compress(&A, &B);
igraph_sparsemat_print(&B, stdout);
igraph_sparsemat_dupl(&B);
igraph_sparsemat_print(&B, stdout);
igraph_sparsemat_destroy(&A);
igraph_sparsemat_destroy(&B);
printf("------------------------\n");
/* Drop zero elements */
igraph_sparsemat_init(&A, 10, 10, /*nzmax=*/ 20);
igraph_sparsemat_entry(&A, 7, 3, 0.0);
for (i=1; i<10; i++) {
igraph_sparsemat_entry(&A, 0, i, 1.0);
igraph_sparsemat_entry(&A, 0, i, 0.0);
}
igraph_sparsemat_entry(&A, 0, 0, 0.0);
igraph_sparsemat_print(&A, stdout);
igraph_sparsemat_compress(&A, &B);
igraph_sparsemat_print(&B, stdout);
igraph_sparsemat_dropzeros(&B);
igraph_sparsemat_print(&B, stdout);
igraph_sparsemat_destroy(&A);
igraph_sparsemat_destroy(&B);
printf("------------------------\n");
/* Add two matrices */
igraph_star(&G, 10, IGRAPH_STAR_OUT, /*center=*/ 0);
igraph_ring(&H, 10, /*directed=*/ 0, /*mutual=*/ 0, /*circular=*/ 1);
igraph_get_sparsemat(&G, &A);
igraph_get_sparsemat(&H, &B);
igraph_destroy(&G);
igraph_destroy(&H);
igraph_sparsemat_compress(&A, &C);
igraph_sparsemat_compress(&B, &D);
igraph_sparsemat_destroy(&A);
igraph_sparsemat_destroy(&B);
igraph_sparsemat_add(&C, &D, /*alpha=*/ 1.0, /*beta=*/ 2.0, &A);
igraph_sparsemat_destroy(&C);
igraph_sparsemat_destroy(&D);
igraph_sparsemat_print(&A, stdout);
igraph_sparsemat_destroy(&A);
return 0;
}
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