Hey Andrew, It sounds more like you want to use a spare matrix (or even just a dictionary with a tuple as the key) and fill in entries as you compute them.
Best, Travis On Wednesday, December 5, 2012 3:29:27 AM UTC-8, Andrew Mathas wrote: > > > huh? >> sage: m=matrix([[1,2],[3,4]]) >> sage: m >> [1 2] >> [3 4] >> sage: m[1,1]=100 >> sage: m >> [ 1 2] >> [ 3 100] >> sage: >> > > Yes, you're right. My issue with matrices is that I can't write something > like: > > sage: matrix([[1,0],[None,0]]) > > (Unless, of course, you want to correct me again:) > > A. > > -- You received this message because you are subscribed to the Google Groups "sage-combinat-devel" group. To view this discussion on the web visit https://groups.google.com/d/msg/sage-combinat-devel/-/bGhR-svWEI8J. To post to this group, send email to sage-combinat-devel@googlegroups.com. To unsubscribe from this group, send email to sage-combinat-devel+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sage-combinat-devel?hl=en.
