Hi, You are right, the PageRank values should all be between 0 and 1. Your graph seems to be a corner case for which the ARPACK solver fail to converge, although I have no idea why. I will evaluate and get back to you.
-- T. On 19 Mar 2013, at 01:22, Krishna Sandeep Reddy Dubba <[email protected]> wrote: > Hi all, > I am trying to compute pagerank for a graph and I am getting strange values > for pagerank. to my knowledge, the page rank values should be between 0 and 1 > but i get very large or very small number (> 1 and < 0). I attach the .gml > file and here is the output. Please let me know what I am doing wrong or is > this graph some strange special case? > > In [4]: import igraph > In [5]: g = igraph.read(f) > In [6]: pr = g.pagerank() > In [7]: pr > Out[7]: > [1323658113126271.8, > -264731622625256.4, > -264731622625256.44, > -264731622625256.44, > 264731622625252.84, > -264731622625256.4, > 264731622625252.94, > -264731622625256.44, > -264731622625254.56, > 264731622625252.78, > -1588389735751520.0, > 4500437584629358.5, > -264731622625254.47, > -264731622625254.53, > -264731622625254.5, > 264731622625252.8, > -264731622625256.4, > -264731622625256.47, > -529463245250509.7, > 264731622625253.78, > -264731622625256.34, > -264731622625256.34, > -264731622625256.4, > -264731622625256.44, > -264731622625256.47, > -264731622625256.4, > -264731622625256.44, > -264731622625256.44] > > Thanks, > dksr > <A0043022_50052754.gml>_______________________________________________ > 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
