Re: [igraph] bug in Graph.community_leading_eigenvector?

[Tamas Nepusz]

Hi,

> Using igraph 0.5 in python 2.5 in osx 10.4, i'm running the  
> leading_eigenvector community detection method and I get the  
> following warning:
Eigenvector calculations in igraph 0.4.5 were not based on ARPACK, so  
that's the cause why there's no warning in 0.4.5. I can't judge  
whether the result of 0.4.5 is correct or the result of 0.5; but maybe  
raising the maximum number of iterations allowed in the ARPACK module  
will help. The Python interface has a variable called arpack_options,  
which is an instance of class ARPACKOptions (see  
help(arpack_options)). arpack_option has an attribute called maxiter  
(which is 3000 per default) that can be modified to allow more  
iterations. Maybe this helps, maybe not.

--
Tamas