Re: [R] about centralization

2008-11-30 Thread Simone Gabbriellini
Weijia, if you only need degree centralization, Gabor suggests me those lines of code and they work great: ## undirected graph centralization<-(sum(max(degree(g))-degree(g)))/(vcount(g)-1)/ (vcount(g)-2 ## directed graph centralization<-(sum(max(degree(g))-degree(g)))/(2*vcount(g)-1)/ (vc

Re: [R] about centralization

2008-11-30 Thread Gábor Csárdi
Weijia, centralization was not included in igraph, because really, it takes only writing a one line function to do it. But it is on our TODO list and will be included soon. E.g. for degree see the thread that starts here: http://lists.gnu.org/archive/html/igraph-help/2008-11/msg00064.html You can

[R] about centralization

2008-11-30 Thread Weijia You
Hi all, Is there anyone who ever used igraph to calculate the index of "centralization" ? I tried my best but can't find it in igraph. The brief introduction to "centralization" can be found here , and I think it's an important index for measuring the centrality on the aggregated level.(http://fa