On Mon, May 5, 2014 at 4:18 PM, Tom Wright <[email protected]> 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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