Re: [igraph] help with graph.union.by.name

[Umberto Medicamento]

Thanks Gabor, I tried graph.union in Igraph 0.7.1., setting  
byname="auto", since the graphs have a "name" attribute.

It keeps the edge weight and it generates:

IGRAPH DN-- 99 638 --
+ attr: name (v/c), weight_1 (e/n), weight_2 (e/n)

quoting the Igraph manual "If an attribute is present in multiple  
graphs and would result a name clash, then this attribute is renamed  
by adding suffixes: _1, _2, etc."

What exactly does the function? How can I get a unique weight  
attribute in my final graph?

Also, if run graph.union setting byname=FALSE, the number of nodes in  
the final graph changes.

IGRAPH D--- 94 928 --
+ attr: name_1 (v/c), name_2 (v/c), weight_1 (e/n), weight_2 (e/n)

Could you explain me, what does it mean? When byname is set FALSE,  
operation is performed on symbolic vertex names instead of the  
internal numeric vertex ids. Hence, I suppose I should aspect this  
different result, correct?

Thanks, U.M.

Gábor Csárdi <address@hidden> ha scritto:

> On Wed, Nov 5, 2014 at 11:25 AM, Umberto Medicamento
> <address@hidden> wrote:
> [...]
> > Great, does it handles edge weights too and other vertex/edge attributes?
>
> I believe so.


> > It runs with my data, can I try your tests?
>
> I copy-and-paste-d the code from your email, into igraph 0.7.1, R 3.1.1.
>
> Gabor
>
> [...]
>
> _______________________________________________
> igraph-help mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/igraph-help

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Dr. Agr. Umberto Medicamento
PhD, MoS
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