Re: [igraph] fastgreedy.community fails on Zachary karate club data set

[Moses Boudourides]

Hi,

Actually I'm interested in a network data set with multiple-edges
(coming from multiple relationships).

Could you recommend one?

Best,

--Moses


On Wed, Jan 26, 2011 at 8:27 AM, Tamás Nepusz <address@hidden> wrote:
> Hi,
>
> Try G <- simplify(G) to get rid of multiple edges in your graph; the karate 
> club network should have only 34 vertices and 78 edges, while you have 154 
> edges.
>
> --
> Tamas
>
> On 26 Jan 2011, at 02:23, Liang Wang wrote:
>
>> Hi,
>>
>> When I ran fastgreedy.community algorithm on the Karate data set,  I got an 
>> error message, as shown below. What am I doing wrong here?
>>
>> Thanks a lot for your help.
>> Liang
>>
>> > G  <- read.graph('./krate0.txt',format="edgelist",directed="FALSE")
>> > G
>> Vertices: 34
>> Edges: 154
>> Directed: FALSE
>> Edges:
>> [0]    0 --  1
>> [1]    0 --  2
>> [2]    0 --  3
>> [3]    0 --  4
>> ....
>> [150] 29 -- 33
>> [151] 30 -- 33
>> [152] 31 -- 33
>> [153] 32 -- 33
>>
>> > fc <- fastgreedy.community(G)
>> Error in fastgreedy.community(G) :
>>   At fast_community.c:540 : fast-greedy community finding works only on 
>> simple graphs, Invalid value
>>
>>
>>
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