Re: [igraph] number of nodes

[Roberto Pagliari]

I have a last question about clustering. I can't get the code to work, I always get "Assertion failed: (v->stor_begin != NULL), function igraph_vector_bool_size, file vector.pmt, line 449.

Abort trap"

The code is this

#include <iostream.h>

#include <stdio.h>

#include <stdlib.h>

#include <igraph.h>

int main(void) {

igraph_t graph;

FILE *myfile;

igraph_vector_t membership;

igraph_vector_t weights;

igraph_vector_t initial;

igraph_vector_bool_t fixed;

igraph_integer_t num_nodes, num_edges;

myfile = fopen("europe.gml", "r");

igraph_read_graph_gml(&graph, myfile);

fclose(myfile);

num_nodes = igraph_vcount(&graph);

igraph_vector_init(&membership, num_nodes);

num_edges = igraph_ecount(&graph);

igraph_vector_init(&weights, num_edges);

  for(int i=0; i<igraph_vector_size(&weights); i++) 

{

VECTOR(weights)[i] = 1;

/* VECTOR(initial)[i] = i;

VECTOR(fixed)[i] = 0;*/

  }

igraph_community_label_propagation(&graph, &membership, &weights, &initial, &fixed);

cout << "Number of nodes: " << num_nodes << "\n Number of edges: " << num_edges << "\n";

igraph_vector_destroy(&membership);

igraph_vector_destroy(&weights);

igraph_destroy(&graph);

return 0;

}

On Wed, Nov 25, 2009 at 12:19 PM, Roberto Pagliari <address@hidden> wrote:

for some reasons if I declare graph as igraph_t graph and use &graph, it works

On Wed, Nov 25, 2009 at 12:17 PM, Roberto Pagliari <address@hidden> wrote:

the code I used is this

int main(void) {

igraph_t *graph;

FILE *myfile;

igraph_vector_t *membership;

igraph_vector_t *weights;

igraph_vector_t *initial;

igraph_vector_bool_t *fixed;

int num_nodes;

myfile = fopen("europe.gml", "r");

igraph_read_graph_gml(graph, myfile);

num_nodes = igraph_vcount(graph);

// printf("number of nodes: %f\n", igraph_vcount(graph));

// igraph_community_label_propagation(graph, )

fclose(myfile);

return 0;

}