Re: [igraph] segmenting graphs

[Gábor Csárdi]

On Mon, May 5, 2014 at 4:18 PM, Tom Wright <address@hidden> wrote:

Hi,
I'm trying to use iGraph in the R environment and I'm getting confused.
It seems to me that what I want to do should be simple but...

t<-graph.empty()
t<-t+vertices(c('r',LETTERS[1:9]))
t['r',D.vertices[,1],attr='weight']<-1

Error in as.igraph.vs(x, j) : object 'D.vertices' not found

 

t['A','B']<-1
t['r','A']<-FALSE

I want to get the subgraph with vertex 'A' as the root, i.e. vertices
{'A','B'}

What does this really mean? The whole tree rooted at 'A'? 

graph.neighborhood(t, 'A', order=vcount(t))[[1]]

Or something else?

Gabor

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