Re: [igraph] vertex_comb=NULL in contract_vertices() – is this okay?
I should have looked at the code more carefully. I appears that: 1. The original graph is destroyed and replaced with the new one. 2. vertex_comb is checked for being NULL. In that case the attribute handling code is skipped. On 19 September 2016 at 15:23, Szabolcs Horvát wrote: > Actually I don't fully understand this function. > > The signature is: > > int igraph_contract_vertices(igraph_t *graph, > const igraph_vector_t *mapping, > const igraph_attribute_combination_t *vertex_comb); > > 'graph' is the input graph. Where is the new graph returned? > > On 19 September 2016 at 15:17, Szabolcs Horvát wrote: >> Hello everyone, >> >> Quick question about contract_vertices(): >> >> http://igraph.org/c/doc/igraph-Structural.html#igraph_contract_vertices >> >> I don't have attributes. Can I just pass vertex_comb=NULL? >> >> Szabolcs ___ igraph-help mailing list igraph-help@nongnu.org https://lists.nongnu.org/mailman/listinfo/igraph-help
Re: [igraph] vertex_comb=NULL in contract_vertices() – is this okay?
> int igraph_contract_vertices(igraph_t *graph, > const igraph_vector_t *mapping, > const igraph_attribute_combination_t *vertex_comb); > > 'graph' is the input graph. Where is the new graph returned? Nowhere - "graph" will be modified in-place. T. ___ igraph-help mailing list igraph-help@nongnu.org https://lists.nongnu.org/mailman/listinfo/igraph-help
Re: [igraph] vertex_comb=NULL in contract_vertices() – is this okay?
> I don't have attributes. Can I just pass vertex_comb=NULL? Yes, you should be able to do that safely. If it isn't safe then it's a bug. T. ___ igraph-help mailing list igraph-help@nongnu.org https://lists.nongnu.org/mailman/listinfo/igraph-help
Re: [igraph] vertex_comb=NULL in contract_vertices() – is this okay?
Actually I don't fully understand this function. The signature is: int igraph_contract_vertices(igraph_t *graph, const igraph_vector_t *mapping, const igraph_attribute_combination_t *vertex_comb); 'graph' is the input graph. Where is the new graph returned? On 19 September 2016 at 15:17, Szabolcs Horvát wrote: > Hello everyone, > > Quick question about contract_vertices(): > > http://igraph.org/c/doc/igraph-Structural.html#igraph_contract_vertices > > I don't have attributes. Can I just pass vertex_comb=NULL? > > Szabolcs ___ igraph-help mailing list igraph-help@nongnu.org https://lists.nongnu.org/mailman/listinfo/igraph-help
