Re: [igraph] degree correlation matrix that relies on (arbitrary) node values

[Hermann Norpois]

So far as I understood assortativity_nominal calculates a Newman assortativity coefficient. But how do I get "e(i,j) (...) the fraction of edges connecting vertices of type i and j?" I need it because I would like to calculate the local assortativity according to Piraveenan et al 2010.

Thanks Hermann

2015-10-07 11:13 GMT+02:00 Gábor Csárdi <address@hidden>:

Isn't this just a variant of assortativity, i.e. assortativity_nominal?

http://igraph.org/r/doc/assortativity.html

Gabor

On Wed, Oct 7, 2015 at 10:12 AM, Hermann Norpois <address@hidden> wrote:
>
> I want a matrix (like the degree correlation matrix) with the  probabilities
> of finding
> a node with y-value i and j at the two ends of a randomly selected link. I
> guessed that this is somehow similar to a degree correlation matrix but
> instead of the node degrees I use the y-values of gg.
>
> I called it 'degree correlation matrix' because the node values do not rely
> on the degrees of the node.
>
>
> Thanks Hermann
>
> 2015-10-07 10:37 GMT+02:00 Gábor Csárdi <address@hidden>:
>>
>> What is a "degree correlation matrix"?
>>
>> Gabor
>>
>> On Wed, Oct 7, 2015 at 9:33 AM, Hermann Norpois <address@hidden>
>> wrote:
>> > Hello,
>> >
>> > I want to generate a 'degree correlation matrix' according to node
>> > values y
>> > that do not rely on the degree of the nodes.
>> > My toy example:
>> >
>> > gg <- erdos.renyi.game (10,0.7)
>> > V(gg)$y <- sample (5,10, replace=TRUE)
>> >
>> > I started with ...
>> > edges.gg <- get.edgelist (gg)
>> > mat.y <- matrix (V(gg)$y[edges.gg[,1]], V(gg)$y[edges.gg[,2]],
>> > nrow=length
>> > (V(gg)$y[edges.gg[,1]]), ncol=2)
>> >
>> > ... to get the combinations of y values that exist in gg but I dont know
>> > how
>> > to measure the frequencies. And I did not find a tool in igraph to
>> > construct
>> > such a 'degree correlation matrix'.
>> >
>> > Has anybody an idea?
>> > Thanks
>> > Hermann
>> >
>> > _______________________________________________
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>> > https://lists.nongnu.org/mailman/listinfo/igraph-help
>> >
>>
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>
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