> I mean for example: > > A = matrix(QQ,[[1,2,3],[4,5,6],[7,8,9]]) > A.submatrix([1,3],[1,3]) > ==> [1,3] > [7,9]
With a slightly different syntax, we can do this by passing a tuple of values for the coordinates: sage: A = matrix(QQ,[[1,2,3],[4,5,6],[7,8,9]]) sage: A [1 2 3] [4 5 6] [7 8 9] sage: A[(0,2), (0,2)] [1 3] [7 9] I've used (0,2) instead of (1,3) because Python starts counting from 0 instead of 1. I don't know how well stuff like this is documented, though. But I haven't read the docs as well as I should have, to be honest-- usually I just try things and only read the docs when they don't work. ;^) Doug -- 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 For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
