Re: [igraph] igraph_get_eid strange behaviour

[Tamas Nepusz]

Hi,

>     igraph_get_edgelist(&community_graph, &community_edges, 0);
>     <iterate over community_edges>
>     { ...
>         igraph_get_eid(&community_graph, &eid, i, i+1, false);
I think you should invoke igraph_get_eid with VECTOR(community_edges) 
[i] and VECTOR(community_edges)[i+1] instead of simply i and i+1.  
Otherwise you request for the edge going between vertex i and i+1.

Note that a simpler way to iterate over all the edges of a graph is:

igraph_eit_t iterator;
igraph_eit_create(&g, igraph_ess_all(), &iterator);
for (; !IGRAPH_EIT_END(iterator); IGRAPH_EIT_NEXT(iterator)) {
  igraph_integer_t edge_id = IGRAPH_EIT_GET(iterator);
  /* Do whatever you want with the edge ID here */
}
igraph_eit_destroy(&iterator);

--
Tamas