An idea to throw in: >>> mm = matrix(ZZ, 2, 3, [1,0,2,0,0,0])
>>> mm.numpy() != 0 array([[ True, False, True], [False, False, False]], dtype=bool) >>> (mm.numpy() != 0).sum() 2 Harald -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.