Re: [igraph] Giant Component

[Gábor Csárdi]

Hello,

add a vertex attribute for the original graph:

V(g)$name <- seq_len(vcount(g))-1

and then you can query the edgelist using the 'name' vertex attribute:

g2 <- giant.component(g)
get.edgelist(g2, names=TRUE)

Best,
Gabor

On Wed, Aug 19, 2009 at 8:39 PM, Surendar
Swaminathan<address@hidden> wrote:
> Hello Gabor,
>
>  Thank you very much for the reply. Its working perfectly thank you
> very much. I am trying to output the edgeliest with Vertex number.
>
> I want to output the original vertex number that I used for the input.
>
> I tried doing write.graph(giant,"file name","edgelist")
> this writex the output, but it starts with zero.And, also tried
> graph.data.frame it does not allow me to do it.
>
> Earlier I used to find bet<-between(g)
> bet<-data.frame(Person=V(g)$name,bet=betweenness)
>
> is there anyway I can do something like this.
>
> Thank you very much once again.
>
> Surendar
>
> On Tue, Aug 18, 2009 at 12:37 AM, Gábor Csárdi<address@hidden> wrote:
>> Surendar,
>>
>> what is the tail component? Everything else than the largest? Then
>> these will do:
>>
>> giant.component <- function(graph, ...) {
>>  cl <- clusters(graph, ...)
>>  subgraph(graph, which(cl$membership == which.max(cl$csize)-1)-1)
>> }
>>
>> tail.component <- function(graph, ...) {
>>  cl <- clusters(graph, ...)
>>  subgraph(graph, which(cl$membership != which.max(cl$csize)-1)-1)
>> }
>>
>> Gabor
>>
>> On Tue, Aug 18, 2009 at 12:08 AM, Surendar
>> Swaminathan<address@hidden> wrote:
>>> Hello All,
>>>
>>>  I have been doing SNA metrics using Igraph in R. I have this
>>> question. What I have is node to node link. Is there anyway I can find
>>>  Giant and Tail component.
>>>
>>> Surendar
>>>
>>>
>>> _______________________________________________
>>> igraph-help mailing list
>>> address@hidden
>>> 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