Re: [igraph] Relative betweenness

[Tamás Nepusz]

> 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