igraph

  1. Bug #404256
  2. Comment #6

Comment 6 for bug 404256

Revision history for this message
Michael Bommarito (mjbommar) wrote :

Based on the output from 0.5.2 on Windows, I decided to test the maxiter parameter in 0.6.

Could the error handling be what broke? Did the maxiter warning code maybe get switched and now it's unrecognized, getting caught by the "Unknown error" handler?

igraph.arpack_options.maxiter = 10 => Unknown ARPACK error
igraph.arpack_options.maxiter = 100 => Unknown ARPACK error
igraph.arpack_options.maxiter = 1000 => Unknown ARPACK error
igraph.arpack_options.maxiter = 10000 => OK

I guess I'm not sure how many iterations are appropriate here. I have a good understanding of the eigenvalue methods from a theoretical standpoint, but I never learned the details of the implicitly restarted algorithms in class.