Re: [igraph] RuntimeWarning: Non-zero return code from ARPACK routine

[Chris Wj]

It happens with a few randomly generated graphs. And I mean random of this sort: using random.randint to generate edges and positive >0 weights. It's an unrealistic graph, but I needed to generate a sufficiently large data set for simple testing. I would probably be better off using the graph generators in igraph. I'll send you some of the graphs that come up with those errors nonetheless.

-Chris

On Tue, Feb 17, 2009 at 6:11 PM, Tamas Nepusz <address@hidden> wrote:

My best guess is that ARPACK doesn't like your network for some reason and it either fails to converge or something like that. If you send me your network, I'll try to reproduce it and see what's going on.

--
Tamas

On 2009.02.16., at 18:24, Chris Wj wrote:

What would cause these warnings?

~: RuntimeWarning: Non-zero return code from ARPACK routine! at centrality.c:414
 return igraphG.hub_score()
~: RuntimeWarning: Non-zero return code from ARPACK routine! at centrality.c:414
 return igraphG.authority_score()
~: RuntimeWarning: Non-zero return code from ARPACK routine! at centrality.c:207
 return igraphG.eigenvector_centrality()

-Chris

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