Re: [igraph] Interactions between communities

[Chris Watson]

If you're using R, you can do something like this: (assuming "comm" is the community membership vector)

edges1 <- E(g)[which(comm == 1) %--% which(comm == 1)]

That should give you only edges that connect vertices in community #1. You can apply to all others in a loop, using *apply, etc.

On Thu, Jun 18, 2015 at 12:04 PM, Manuel Zetina-Rejón <address@hidden> wrote:

I'm stuck in how to index all edges between communities in order to sum weight attribute per communitie to express in relation to total weight of edges.

Let me say I identified communities in a network, then I identify memberships. I wonder how to index only edges in a community i order to sum the weights of them. I've found this like the inverse of crossing() function.

Any help?

Thank you

Manuel

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Dr. Manuel J.  Zetina-Rejón
Interdisciplinary Center of Marine Sciences National Polytechnic
Lab. of Dynamics & Management of Aquatic Ecosystems
Av. Instituto Politénico Nacional S/N Col. Playa Palo de Sta. Rita La Paz, BCS, México
CP 23096
Tel. +52 (612) 1234658 Ext. 82452
Fax. +52(612) 1225322
http://www.cicimar.ipn.mx

REFERENCES
http://scholar.google.com.mx/citations?user=Whcz9wUAAAAJ&hl=es
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