On Wed, Mar 05, 2008 at 02:27:21AM -0500, Charilaos Skiadas wrote: [...] > > Btw, you will likely want to take the betweenness call out, and call > it once and store the result, instead of calling it twice (well, > assuming the graph is largish). Or even better, use which.max: > > which.max(betweenness(graph = my.graph, v=V(my.graph), directed = > FALSE))
This is almost good, but there is a catch, in igraph vertices are numbered from zero. So if you want an igraph vertex id, then you need to subtract one from this, i.e.: maxb <- which.max(betweennness(my.graph, directed=FALSE))-1 You can double check it: betweenness(my.graph, maxb, directed=FALSE) Gabor PS. there is also an igraph mailing list, see the igraph homepage at igraph.sf.net > Haris Skiadas > Department of Mathematics and Computer Science > Hanover College > [...] -- Csardi Gabor <[EMAIL PROTECTED]> UNIL DGM ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
