On Fri, Dec 20, 2013 at 1:05 PM, Ju-Sung Lee <[email protected]> wrote: > The results igraph R's closeness() and centralization.closeness()$res are > different. It appears closeness() uses the sum of shortest path lengths > whereas centralization.closeness() uses the average (before the inversion). > Was this intentional?
I guess so. Centralization means maximization imho, and if you invert the average distance, then you would need to minimize. But I agree I can be confusing. > If so, it should probably be in the documentation. Agreed. > Also, the documentation is confusing. It states the function employs the > average length of shortest paths (which is what centralization.closeness() > uses) but the formula does not reflect this (but closeness() is consistent > with formula). If _does_ employ the average length of shortest paths. And then it inverts it, AFAIR. > This was found under igraph_0.6.5-2 (I haven't upgraded my R yet so I don't > know if this was fixed in igraph_0.6.6 but the README doesn't report any of > this). Which README is this? Gabor > Thanks. > > Jay > > > _______________________________________________ > 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
