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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2007-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard street, 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 <math.h>
int main(void) {
igraph_t g;
igraph_vector_t v, weights;
igraph_real_t value;
igraph_arpack_options_t options;
igraph_star(&g, 10, IGRAPH_STAR_UNDIRECTED, 0);
igraph_vector_init(&weights, 9);
igraph_vector_fill(&weights, 1);
igraph_arpack_options_init(&options);
igraph_vector_init(&v, 0);
igraph_eigenvector_centrality(&g, &v, &value, /*directed=*/ 0,
/*scale=*/1, &weights,
&options);
if (options.info != 0) {
return 1;
}
printf("eigenvalue: %g\n", value);
printf("eigenvector:\n");
igraph_vector_print(&v);
igraph_destroy(&g);
igraph_vector_destroy(&v);
igraph_vector_destroy(&weights);
return 0;
}
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