Hi everyone, I want to count the number of non-zero entries in a matrix but I can't find a Sage command to do this. Instead, I found a NumPy command numpy.count_nonzero to do it.
I tested it in the online Sage Cell server: https://sagecell.sagemath.org/ The code goes like this: import numpy as np mm = matrix(ZZ, 2, 3, [1,0,2,0,0,0]) print mm print np.count_nonzero(mm) It worked in the Sage Cell Server. However, when I tried it out in Sage v5.12 in Linux. There is an error message: " 'module' object has no attribute 'count_nonzero' ". Also, when I typed numpy.<tab> to see all possible commands, numpy.count_nonzero does not appear. It seems as though there is no such command. I am willing to use other simple commands as long as I get to count the nonzero entries of a matrix. Perhaps someone can help me with this... Thanks! Cheers, Eileen. -- 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.
