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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2010-2012 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 <stdio.h>
int main() {
igraph_t g, sub;
igraph_vector_t map, invmap;
igraph_vector_t keep;
long int i;
igraph_small(&g, 9, IGRAPH_DIRECTED, 0,1, 0,2, 1,3, 2,3,
1,4,4,2, 1,5,5,2, 1,6,6,2, 1,7,7,2, 1,8,8,2,
-1);
igraph_vector_init(&map, 0);
igraph_vector_init(&invmap, 0);
igraph_vector_init(&keep, igraph_vcount(&g));
for (i=0; i<igraph_vector_size(&keep); i++) {
VECTOR(keep)[i] = i;
}
igraph_induced_subgraph_map(&g, &sub,
igraph_vss_vector(&keep),
IGRAPH_SUBGRAPH_COPY_AND_DELETE,
&map, &invmap);
printf("Map: "); igraph_vector_print(&map);
printf("Inverse map: "); igraph_vector_print(&invmap);
igraph_write_graph_edgelist(&sub, stdout);
igraph_vector_destroy(&keep);
igraph_vector_destroy(&map);
igraph_vector_destroy(&invmap);
igraph_destroy(&sub);
igraph_destroy(&g);
return 0;
}
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