Re: [igraph] motifs of size 4 tassonomy

[Simone Gabbriellini]

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
>> 
>> 
>> 
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