Re: [igraph] as_clustering() error

[xiao wu]

I am very sorry to bother you all again on this, as I tried but still couldn't figure out the exactly how to do this on my own.

I added the code to the VertexDendrogram Object. What would be the code examples that I'd use this function?

Right now I have:

import igraph

g = igraph.read('/home/xiao/Desktop/tag.NET',format="pajek")

dendrogram = g.community_edge_betweenness()

What's next to prevent as_clustering freaks out?

> Date: Mon, 27 Oct 2014 09:01:23 +0100

> From: address@hidden
> To: address@hidden
> Subject: Re: [igraph] as_clustering() error
>
> Hello,
>
> This has been discussed on the list before; unfortunately
> VertexDendrogram.as_clustering() freaks out if the dendrogram is not complete,
> which may happen with certain graph clustering methods if your initial graph is
> disconnected (because these methods won't try to merge the disconnected
> components at the end). A temporary solution is to postprocess the dendrogram
> a bit so it becomes complete; see this thread for more details:
>
> https://lists.nongnu.org/archive/html/igraph-help/2014-02/msg00067.html
>
> Best,
> T.
>
> On 10/26, xiao wu wrote:
> > I am new to igraph and use python igraph 0.6.5 in ubuntu python 2.7. I have
> > my own pajek file I loaded into python, and ran community detection algorithm
> > and got the following dendrogram
> >
> > >>> print(dendrogram)Dendrogram, 1335 elements, 314 merges
> > But when I tried to run as_clusting, I got the following error:
> > >>> clusters = dendrogram.as_clustering()Traceback (most recent call last):
> > >>> File "<stdin>", line 1, in <module> File
> > >>> "/usr/lib/python2.7/dist-packages/igraph/clustering.py", line 959, in
> > >>> as_clustering num_elts - n)igraph._igraph.InternalError: Error at
> > >>> community.c:767: `steps' to big or `merges' matrix too short, Invalid
> > >>> value
> > How do I debug from here? My pajek file's Vertices are not continuous. Would
> > that create a problem?
> > Thanks,
> > Xiao
> >
> >
>
> > _______________________________________________
> > igraph-help mailing list
> > address@hidden
> > https://lists.nongnu.org/mailman/listinfo/igraph-help
>
>
> --
> T.
>
> _______________________________________________
> igraph-help mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/igraph-help