Re: [igraph] Spinglass community

[Tamás Nepusz]

Dear Jing Wang, 

Could this be related to the following bug?
https://bugs.launchpad.net/igraph/+bug/539413

-- 
T.


On Friday, 2 March 2012 at 22:03, Wang, Jing wrote:

> Dear Sir/Madam,
> 
> When I use igraph 0.5.5-4 to run the "spinglass.community" (parameters: 
> spins=15 and gamma=1), I found that the output modularity score from this 
> function was not equal to the modularity score outputted from "modularity" 
> function. Because I set gamma as 1 in the "spinglass.community" function, the 
> modularity scores from these two functions should be the same according to 
> the original reference of spinglass method (J. Reichardt and S. Bornholdt: 
> Statistical Mechanics of Community Detection, Phys. Rev. E, 74, 016110 
> (2006), http://arxiv.org/abs/cond-mat/0603718). Moreover, when I use igraph 
> 0.5.2-2 to run these two functions, the two modularity scores are the same. 
> Thus, whether does the "spinglass.community" in igraph 0.5.5-4 has some 
> problems? Thank you very much for your help!
> 
> Best,
> Jing Wang
> 
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