I haven't checked this, but I suspect that the naive approach of making a copy of the zero matrix and then filling in the entries with set_unsafe in a loop will be faster.
On Wednesday, December 5, 2012 11:24:44 PM UTC, Nils Bruin wrote: > > No, list concatenation does not benefit from balanced trees. > sum(entries,[]) should simply be spelled > L=[] > L.extend(itertools.chain(*entries)) > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To post to this group, send email to sage-support@googlegroups.com. To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support?hl=en.
