Re: [igraph] graph.knn in R

[Gábor Csárdi]

2012/7/5 Umberto77 <address@hidden>:
> Hi,
> I've got probblems with gaph.knn in R using a weighted directed graph. It is
> supposed to ignore directions isn't it?
> that's what I've got/
>> graph.knn(g, vids=V(g), weights=TRUE)
> Errore in graph.knn(g, vids = V(g), weights = TRUE) :
>   At structural_properties.c:6493 : Average nearest neighbor degree Works
> only with simple graphs, Invalid value
> thanks a lot!

Yes, the edge directions are ignored, the problem is that your graph
is not simple, i.e. is contains either multiple and/or loop edges. If
you don't need those, you can delete them with simplify().

Gabor

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-- 
Gabor Csardi <address@hidden>     MTA KFKI RMKI