Re: [igraph] Community detection of weighted graphs and weighted modularities

[Gábor Csárdi]

Hi,

On Thu, Apr 12, 2012 at 8:46 AM, R N <address@hidden> wrote:
> Hi,
>
> are the examples of community detection presented in
> http://igraph.wikidot.com/community-detection-in-r
> meant for unweighted graphs?

yes, it seems so.

> How can they be modified to use edge
> weights? Is it sufficient to add the
> appropriate parameter, e.g.:

label.propagation.community() does have an argument 'weights'. Please
see the manual:
http://igraph.sourceforge.net/doc/R/label.propagation.community.html

> ### label.propagation.community
> memberships$`Label propagation` <- label.propagation.community(G, E(G)$weight)
> ### and calculate modularity
> Q <- modularity (G, memberships$`Label propagation`,  E(G)$weight)

modularity() also supports weights:
http://igraph.sourceforge.net/doc/R/modularity.html

[...]

-- 
Gabor Csardi <address@hidden>     MTA KFKI RMKI