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[igraph] calculating modularity

From: Khanh Nguyen
Subject: [igraph] calculating modularity
Date: Wed, 8 Dec 2010 13:39:14 -0500

Hi all,

I create a graph as follow

src <- c('a','b','c','e','f')
dst <- c('b','c','d','f','g')
ee  <- cbind(src,dst)
g1  <- graph.edgelist(as.matrix(ee), directed=FALSE)

and two vector describing the community structure of the graph

c1 <- c("1", "a", "b" , "c" , "d")
c2 <- c("2", "e","f","g")

I'd like to use modularity() to compute the modularity but I am
struggling to generate the "membership" parameter correctly. How can I
map the community assignment in this form to the node's id? Thanks.



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