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Re: [igraph] community clustering in python


From: Tamas Nepusz
Subject: Re: [igraph] community clustering in python
Date: Fri, 23 Nov 2007 13:48:42 +0100

Hi Kurt,

Can you please send me an example graph by which I could reproduce the error on my computer?

Thanks,
--
T.

On 2007.11.23., at 13:44, Kurt J wrote:

Hi Tamas,

Thanks for the tip, however simplifying doesn't seem to help...

from igraph import *
G = Graph.Read('pr2graph.ml', format='graphml')
G.to_undirected()
sG = G.simplify()
Lsv = sG.community_fastgreedy()
Bus error

-Kurt J


On Nov 23, 2007 12:31 PM, Tamas Nepusz <address@hidden> wrote:
Hi,

Have you tried simplifying the graph before starting the community
detection? Our former implementation did not work for graphs with
multiple or loop edges. This was corrected recently in the dev branch
and will be released officially as igraph 0.5 in a couple of weeks
(possibly :)). So my suggestion is:

G.to_undirected()
G.simplify()
Lsv = G.community_fastgreedy()

Should i just be using/learning R?
I think the error exists in the R interface as well, since they both
use the common C core.

--
T.

On 2007.11.23., at 13:23, Kurt J wrote:

Hi,

I was hoping to experiment  with some clustering using the python
interface to igraph.  The igraph implementation of the modularity
optimization gives me a bus error:

G.to_undirected()
Lsv = G.community_fastgreedy()
Bus error

on Python 2.4.3



Cheers,
-Kurt J


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