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Re: [igraph] How to know deleted edges by spinglass.community()

From: MATSUDA, Noriyuki
Subject: Re: [igraph] How to know deleted edges by spinglass.community()
Date: Fri, 21 Dec 2007 10:01:55 +0900


  Is there a quick and efficient way to know which edges were deleted by
Besides the analysis of deleted edges, It will help create a graph of communities to
be compared with the original one.
Use of delete.edges() seems faster than repeated use of graph.disjoint.union, particularly
when I want to preserve vertex and edge attributes.

  Thanks in advance and Merry X'mas.

eA<- c(0,4,0,5,0,6,0,7,0,8,0,9,0,10)
eB<- c(1,11,1,12,1,13,1,14,1,15,1,16,1,17)
eC<- c(2,18,2,19,2,20,2,21,2,22,2,23,2,24)
eD<- c(3,25,3,26,3,27,3,28,3,29,3,30,3,31,3,32)
z <- 0:3;  V(g)[z]$name = paste(V(g)[z],LETTERS[z+1],sep="")
z <- 4:10; V(g)[z]$name = paste(V(g)[z],"a",sep="")
z <- 11:17; V(g)[z]$name = paste(V(g)[z],"b",sep="")
z <- 18:24; V(g)[z]$name = paste(V(g)[z],"c",sep="")
z <- 25:32; V(g)[z]$name = paste(V(g)[z],"d",sep="")

V(g)$color="#efefef"; V(g)$size=16
V(g)[0:3]$color="#aaaaFF"; V(g)[0:3]$size=20
g <- add.edges(g,c(0,1,2,7,15,25),color="red")

plot(g, layout= layout.fruchterman.reingold,vertex.label=V(g)$name, cex=1.3)
title(main=list("fruchterman.reingold",col="red",font=4, cex=1.4))

spn <- spinglass.community(g, spins=4)

MATSUDA, Noriyuki <in Kanji> 松 田 紀 之

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