Re: [igraph] : Infomap

[patricia]

Thank you for the explanation, but please explain me how to do the following, step by step; for I am beginning to study community detection algorithms now and do not have much practice in programming.

As explained earlier, I want to access the vertices of each of the communities identified by the Infomap and then check the labels for all vertices contained within each community. The graph I am using consists of 150 nodes, each of which has an attribute called "label1" which can assume the following values: 1, 2, or 3. When analyzing the values of "label1" within a community I need to calculate the proportion of different classes contained within the analyzed community, and need to do this for all communities found.

example:

Suppose a generic community:

Community 1 - has 8 vertices,

VERTICES   LABEL1

V1                   1

V2                   1

V3                   2

V4                   2

V5                   2

V6                   2

V7                   2

V8                   3

LABEL1% = 1 => 0:25

LABEL1% = 2 => 0625

LABEL1% = 3 => 0125   

Regards, 

Patricia

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Date: Thu, 27 Nov 2014 01:18:19 +0330
From: address@hidden
To: address@hidden
Subject: Re: [igraph] : Infomap

Hi,

I'm not sure , I understand the question right or not but if you want to access the vertices in each community using R  you could do this :

please consider this example :

karate<- graph.famous("Zachary")

infokarate <- infomap.community(karate)

V(karate)$name=V(karate)

V(karate)[membership(infokarate)==1]      # vertices within community 1

and by label if you mean one of the attribute of the vertices :

V(karate)[membership(infokarate)==1] $name 

Regards,

fatemeh

On Thu, Nov 27, 2014 at 12:46 AM, patricia <address@hidden> wrote:

Hello,

I would like your help to solve the following problem, using the Infomap communities detection algorithm:

Suppose that after the execution of the algorithm, four communities have been reported, for example, the first three community has vertices, second 6, third 8 and the fourth second.

I want to know, how do I access the 3 vertices (nodes) contained within the community 1 to then access their labels of the vertices belonging to the same community.

Example: Community 1 => V1, V2 and V3

labels:

V1 = 1;

V2 = 1;

V3 = 2;

Thank you

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regards

F..A

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