Re: [igraph] extracting lists

[Gábor Csárdi]

On Tue, Jan 27, 2009 at 7:11 PM, Thiago M. Venancio
<address@hidden> wrote:
> Thanks Gabor. It worked perfectly.
>
> A related question: How can one export the edge labels ?

You mean into a file? Use a format that supports them, e.g. GraphML or GML.

> There is no attribute name in edges
> I would like to recover the data like it appear when querying:
> NODE1   -- NODE2

Where are the edge labels here? I am a bit confused about what you want.

G.

> Best,
>
> Thiago
>
> On Tue, Jan 27, 2009 at 3:36 AM, Gábor Csárdi <address@hidden> wrote:
>>
>> V(g)$name gives the vertex names.
>>
>> G.
>>
>> On Tue, Jan 27, 2009 at 12:46 AM, Thiago M. Venancio
>> <address@hidden> wrote:
>> > Hi,
>> >
>> > The file graph.txt is a ncol format graph.
>> > I got a clue here. What happens is that the V(graph) command returns an
>> > integer type data that starts in the position zero. So, the degree in
>> > deg[1]
>> > is relative to vec[0] vertex.
>> > I would like to transform the vec (integer type) to get a vector with
>> > node
>> > names (not numerical IDs). Every time I use as.vector and relative
>> > commands
>> > I get the numerical IDs and not the names.
>> >
>> > Hope you can help me now with the additional info provided.
>> >
>> > Thanks.
>> >
>> > Thiago
>> >
>> > On Mon, Jan 26, 2009 at 5:56 PM, Gábor Csárdi <address@hidden>
>> > wrote:
>> >>
>> >> On Mon, Jan 26, 2009 at 10:23 PM, Thiago M. Venancio
>> >> <address@hidden> wrote:
>> >> > Hi all,
>> >> >
>> >> > After loading the graph in R, I would like to extract the list with
>> >> > vertices
>> >> > names and their degrees.
>> >> > I know how to save both variables in vectors, however they seem to be
>> >> > in
>> >> > different orders. For example, the degree of the first element in the
>> >> > vector
>> >> > with vertices names is not allocated in the first position in the
>> >> > degree
>> >> > vector.
>> >> > Here is what I am doing:
>> >> >
>> >> > graph = read.graph("graph.txt", format="ncol")
>> >> > deg = degree(graph)
>> >> > vec = V(graph)
>> >>
>> >> Hi,
>> >>
>> >> it is hard to guess what is in 'graph.txt', but 'deg' and 'vec' are
>> >> "in order" here, i.e. deg[1] belongs to vec[1], etc.
>> >>
>> >> You need to give us a reproducible example to see what goes wrong for
>> >> you.
>> >>
>> >> Gabor
>> >>
>> >> > Any help is appreciated.
>> >> >
>> >> > Best,
>> >> >
>> >> > Thiago
>> >> >
>> >> >
>> >> > _______________________________________________
>> >> > igraph-help mailing list
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>> >> > http://lists.nongnu.org/mailman/listinfo/igraph-help
>> >> >
>> >> >
>> >>
>> >>
>> >>
>> >> --
>> >> Gabor Csardi <address@hidden>     UNIL DGM
>> >>
>> >>
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>> >
>> >
>> >
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>> >
>>
>>
>>
>> --
>> Gabor Csardi <address@hidden>     UNIL DGM
>>
>>
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-- 
Gabor Csardi <address@hidden>     UNIL DGM