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## Re: [igraph] motifs of size 4 tassonomy

 From: Tamas Nepusz Subject: Re: [igraph] motifs of size 4 tassonomy Date: Mon, 24 Jan 2011 15:55:28 +0100 User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101208 Lightning/1.0b2 Thunderbird/3.1.7

```THen just simply print the graphs, that should be enough to get an idea
of how they look like:

for i in xrange(11):
print Graph.Isoclass(4, i)

--
T.

On 01/24/2011 03:53 PM, Simone Gabbriellini wrote:
> I got it, plotting is not available on my system!
>
> I'll try to fix that. Thanks,
> Simone
>
> Il giorno 24/gen/2011, alle ore 15.30, Tamas Nepusz ha scritto:
>
>> Hi Simone,
>>
>> You're right, this is not documented properly. Item i in the result
>> counts the number of motifs isomorphic to the graph with 4 vertices and
>> isomorphy class i. There are 11 possible non-isomorphic undirected
>> graphs of size 4, and these can be plotted as follows:
>>
>> for i in xrange(11):
>>    plot(Graph.Isoclass(4, i), "isoclass_%d.pdf" % i, bbox=(100, 100),
>> layout="circle")
>>
>> This snippet gives you 11 PDF files that show each of the isomorphy classes.
>>
>> --
>> Tamas
>>
>> On 01/24/2011 03:24 PM, Simone Gabbriellini wrote:
>>> Hello List,
>>>
>>> I would like to calculate a value of transitivity for an *undirected*
>>> bipartite graph. I have to find the number of quadruplets of nodes with
>>> four links and  the number of quadruplets of nodes with at least three. I
>>> use motifs to extract the quadruplets census:
>>>
>>> (Python)
>>> trans = g.motifs_randesu(size=4)
>>>
>>> but I cannot figure out the right classification for the census list. I
>>> guess the first value is the number of quadruplets with no links, but how
>>> exactly this classification goes on?
>>>
>>> thanks for any help!
>>>
>>> Best regards,
>>> Simone
>>>
>>>
>>>
>>> _______________________________________________
>>> igraph-help mailing list
>>> http://lists.nongnu.org/mailman/listinfo/igraph-help
>>>
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