Re: [igraph] Invalid (negative) vertex id, Invalid vertex id

[Christian Gonzalez]

Hi Tamas,
    Thanks a lot for your suggestions,  my problem was in the 
fetch_edges loop.

Regards,
Christian

El 06/08/09 17:16, Tamas Nepusz escribió:
> Hi Christian,
>
> > But if you only want to see the code, is it:
> I guess somehow you manage to add negative numbers to the "edges" 
> vector in fetch_edges. I mean this part of the code:
>
> > static int fetch_edge(HeapTuple *tuple, TupleDesc *tupdesc, long int 
> > i, pgr_edge_columns_t *edge_columns,
> >           igraph_vector_t *edges, igraph_vector_t *weights, 
> > igraph_vector_t *eids,
> >           igraph_vector_t *vertex, bool directed)
> > { [...] VECTOR(*eids)[i] = DatumGetInt32(id_binval);
> >  VECTOR(*edges)[(2*i)] = DatumGetInt32(s_binval);
> >  VECTOR(*edges)[(2*i) + 1] = DatumGetInt32(t_binval);
> >  VECTOR(*weights)[i] = DatumGetFloat8(c_binval);
> I have a feeling that either DatumGetInt32(s_binval) or 
> DatumGetInt32(t_binval) returns -1 for some reason and that's why you 
> are having the error. Please check explicitly whether you have 
> negative values in the "edges" vector before calling igraph_create -- 
> you can use igraph_vector_min() to check that easily.