Re: [igraph] Error at iterators.c

[Gábor Csárdi]

You need to initialize nrgeo as well. Could you please read the documentation of igraph_get_all_shortest_paths() at http://igraph.org/c/doc/igraph-Structural.html#igraph_get_all_shortest_paths ?

G.

On Wed, Feb 26, 2014 at 9:25 AM, Sana Rahim <address@hidden> wrote:

Even after initializing the res as you mentioned, it is still giving the same segmentation fault. Please guide.

Regards

On Wednesday, 26 February 2014 6:14 PM, Tamás Nepusz <address@hidden> wrote:

The “res” vector that you pass in to igraph_get_all_shortest_paths must be initialized as well using igraph_vector_ptr_init(&res, 0); 

-- 
T.


On Wednesday, 26 February 2014 at 11:32, Sana Rahim wrote:

> Thank you for reply. But when i initialize it i get segmentation fault. 
> 
> #include<igraph.h>
> void main()
> {
> igraph_t graph;
> igraph_vector_t v;
> igraph_vector_ptr_t res;
> igraph_vector_t nrgeo;
> 
> igraph_real_t edges[] = {1, 2, 1, 4, 2, 3, 3, 7, 4, 5, 5, 6, 6, 9, 7, 8, 8, 9};
> 
> igraph_vector_view(&v, edges, sizeof(edges)/sizeof(double));
> 
> igraph_create(&graph,&v, 0, IGRAPH_UNDIRECTED);
> 
> 
> igraph_get_all_shortest_paths(&graph, &res, &nrgeo, 1, igraph_vss_seq(2,8), IGRAPH_ALL);
> 
> igraph_destroy(&graph);
> 
> }
> 
> Regards,
> 
> 
> On Tuesday, 25 February 2014 6:52 PM, Gábor Csárdi <address@hidden (mailto:address@hidden)> wrote:
> See http://igraph.org/c/doc/igraph-Iterators.html
> 
> Gabor
> 
> 
> On Mon, Feb 24, 2014 at 11:45 PM, Sana Rahim <address@hidden (mailto:address@hidden)> wrote:
> > Hi, thanks for immediate reply. How should I initialize vs? When i initialize it like igraph_vs_t vs=3 or give value to vs , it says invalid initializer. 
> > 
> > Regards
> > 
> > 
> > On Tuesday, 25 February 2014 1:28 AM, Gábor Csárdi <address@hidden (mailto:address@hidden)> wrote:
> > You never initialize vs.
> > 
> > G.
> > 
> > 
> > On Mon, Feb 24, 2014 at 2:35 PM, Sana Rahim <address@hidden (mailto:address@hidden)> wrote:
> > > Hi, when I run the following code i get this error Error at iterators.c:769 :Cannot create iterator, invalid selector, Invalid value
> > > Aborted. 
> > > igraph_t graph;
> > > igraph_vector_t v;
> > > igraph_vector_ptr_t vertices;
> > > igraph_vector_ptr_t edges1;
> > > igraph_vs_t vs;
> > > igraph_matrix_t res;
> > > igraph_vector_ptr_t res1;
> > > igraph_vector_t nrgeo;
> > > igraph_real_t edges[] = {1, 2, 1, 4, 2, 3, 3, 7, 4, 5, 5, 6, 6, 9, 7, 8, 8, 9};
> > > igraph_vector_view(&v, edges, sizeof(edges)/sizeof(double));
> > > igraph_create(&graph,&v, 0, IGRAPH_UNDIRECTED);
> > > igraph_get_all_shortest_paths(&graph, &res1, &nrgeo, 1, vs, IGRAPH_ALL);
> > > igraph_destroy(&graph);
> > > 
> > > Where am I making a mistake, please help.
> > > 
> > > Regards
> > > 
> > > _______________________________________________
> > > igraph-help mailing list
> > > address@hidden (mailto:address@hidden)
> > > https://lists.nongnu.org/mailman/listinfo/igraph-help
> > 
> > 
> > 
> > 
> > 
> > _______________________________________________
> > igraph-help mailing list
> > address@hidden (mailto:address@hidden)
> > https://lists.nongnu.org/mailman/listinfo/igraph-help
> 
> 
> 
> 
> _______________________________________________
> igraph-help mailing list
> address@hidden (mailto:address@hidden)

> https://lists.nongnu.org/mailman/listinfo/igraph-help

_______________________________________________
igraph-help mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/igraph-help