Re: [igraph] bipartite.projection() with non numeric vertices id

[capitano . nemo]

That sounds difficult. I don't know how to build a reproducible 
example... It seems the problem is buried in a very large dataset. What 
problematic values should I looked for?

Il 12.11.2013 15:51 Gábor Csárdi ha scritto:
> This happens if you mix zeros with vertex ids, or maybe NAs. Why it
> happens to you I have no clue.
>
> Unless you show us how to reproduce the bug with some reproducible
> example, there is a high chance that nobody can help you.
>
> Best,
> Gabor
>
> On Mon, Nov 11, 2013 at 6:13 PM,  <address@hidden> wrote:
> > I have a bipartite graph of an online forum. The vertices id are the 
> > user id
> > (e.g. "24242434") and url links (e.g. 
> > "www.somesite.com/somethread.html). I
> > successfully create the graph with
> >
> > graph.data.frame(edges, directed=TRUE, vertices=nodes)
> >
> > IGRAPH DN-B 154612 448387 --
> > + attr: name (v/c), gender (v/c), member (v/l), timestamp (v/c), type
> >   (v/l), reactions (v/n), dislikes (v/n), createdAt (v/c), slug (v/c),
> >   postNumber (v/n), likes (v/n), message (v/c), score (v/n),
> >   categoryLink (v/c), createdAt (e/c), type (e/c), parent (e/c),
> >   dislikes (e/n), message (e/c), numReports (e/n), likes (e/n)
> >
> > Now I want a one-mode projection of the graph. But when I try
> >
> > > igraph_onemode <- bipartite.projection(igraph_bi)
> >
> >
> > I get
> >
> > Error in bipartite.projection(igraph_bi) :
> >   At structure_generators.c:84 : Invalid (negative) vertex id, Invalid
> > vertex id
> >
> > This error popped up few times when googling it. Still the discussions 
> > I
> > found (I guess) don't apply to my problem since I can't remove the 
> > negative
> > ids.
> >
> > Thanks
> >
> >
> >
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>
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