Thanks, Tamas. Now, let me add something I've just discovered: the
case A = {u, v} (i.e., A is composed of 2 vertices) and B = V-A is
what Eric Kolaczyk calls co-betweenness (cf., Kolaczyk, E.D., Chua,
D.B., and Barthelemy, M. (2007). Group Betweenness and Co-Betweenness:
Inter-related Notions of Coalition Centrality. Social Networks, 31:3,
190-203, http://arxiv.org/abs/0709.3420v1). In his site
(http://math.bu.edu/people/kolaczyk/software.html), Eric gives a
software (in matlab) for computing group betweenness bounds based on
vertex co-betweenness.Best, --Moses On Thu, Aug 16, 2012 at 10:32 PM, Tamás Nepusz <[email protected]> wrote: >> will be calculated. But I'm not sure whether and how I could get the >> betweenness of A with regards to geodesics stemming from B. Any ideas? > > Your best bet is to get all the shortest paths from each of the vertices in B > using get.all.shortest.paths and then count how many of these paths pass > through A "manually". Note that there could be multiple geodesics originating > in B and going to some other vertex v, and it can happen that _some_ of these > paths pass through v and others do not; in this case, you have to add the > appropriate fraction to A's betweenness score. This could be a bit tricky to > get it right but not impossible. > > Best, > Tamas > > > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help _______________________________________________ igraph-help mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/igraph-help
