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Re: [igraph] How to see communities after community detection algorithm?


From: Zhijiang Wang
Subject: Re: [igraph] How to see communities after community detection algorithm?
Date: Thu, 19 Nov 2009 19:28:22 +0800
User-agent: Thunderbird 2.0.0.23 (X11/20090817)

There are so many community detection algorithms, which is better?

Yonatan Lupu 写道:
Actually, I'm not sure what the difference is exactly.  For some reason, it seems I needed to use both of them to get the results in the format I needed.  Good luck!

On Wed, Nov 18, 2009 at 12:14 AM, Zhijiang Wang <address@hidden> wrote:
 Thank you very much!!!
It's OK!


Would you like to tell me the differences between cbind and as.matrix?

Yonatan Lupu 写道:
Sorry - there is a minor error below.  The fourth line should be:

names<-array(V(x)$name)

On Tue, Nov 17, 2009 at 7:15 AM, Yonatan Lupu <address@hidden> wrote:
Zhijiang,

Suppose x is your graph.  You can create an object that includes the IDs of your nodes and the communities they are in as follows:

y <- fastgreedy.community(x, merges=TRUE)
z<-which.max(fc$modularity)
fc<- community.to.membership(x, y$merges,z)
names<-array(V(jg3)$name)
community<-array(fc$membership)
result<-as.matrix(cbind(names,community))

-Yon

2009/11/17 Zhijiang Wang <address@hidden>
Dear all,

How to see communities after community detection algorithm?
Or I want to see which set of nodes each community contains.

--
Best wishes,
Zhijiang Wang
--------------------------------------------
PHD Student
Room 212, Science buliding,
The International WIC Institute,
College of Computer Science and Technology,
Beijing University of Technology,
Beijing, China.

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--
Yonatan Lupu, J.D.
Doctoral Student, Political Science
University of California, San Diego
http://dss.ucsd.edu/~ylupu/



--
Yonatan Lupu, J.D.
Doctoral Student, Political Science
University of California, San Diego
http://dss.ucsd.edu/~ylupu/


--
Best wishes,
Zhijiang Wang
--------------------------------------------
PHD Student
Room 212, Science buliding,
The International WIC Institute,
College of Computer Science and Technology,
Beijing University of Technology,
Beijing, China.



--
Yonatan Lupu, J.D.
Doctoral Student, Political Science
University of California, San Diego
http://dss.ucsd.edu/~ylupu/


--
Best wishes,
Zhijiang Wang
--------------------------------------------
PHD Student
Room 212, Science buliding,
The International WIC Institute,
College of Computer Science and Technology,
Beijing University of Technology,
Beijing, China.

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