Hi all >>> from sympy import * >>> M = Matrix( [ [1, 2, 3], [2, 3, 4], [3, 4, 5], [4, 5, 6] ] ) >>> M.row_del ( 8 ) # any index >= M.rows to be used >>> print( M ) Matrix( [ [ 1, 2, 3], [2, 3, 4], [3, 4, 5] ] ) # deletes the last row of Matrix for Index >= M.rows
>>> N = Matrix( [ [ 1, 2, 3], [2, 3, 4], [3, 4, 5], [4, 5, 6] ] ) >>> N.row_del( -10 ) >>> print( N ) # deletes the last row of Matrix with any `Negative Index` Matrix( [ [ 1, 2, 3], [2, 3, 4], [3, 4, 5] ] ) But the output for .row_insert() shows different behavior >>> M = Matrix( [ [1, 2, 3], [2, 3, 4], [3, 4, 5] ] ) >>> M.row_insert ( 10, Matrix( [ [ 5, 5, 5 ] ] ) ) Matrix( [ [1, 2, 3], [2, 3, 4], [3, 4, 5], [5, 5, 5] ] ) # inserts the row at the very end for Index >= M.rows >>> N = Matrix( [ [ 1, 2, 3], [2, 3, 4], [3, 4, 5] ] ) >>> N.row_insert( -10, Matrix( [ [5, 5, 5 ] ] ) ) Matrix( [ [5, 5, 5], [1, 2, 3], [2, 3, 4], [3, 4, 5] ] ) # inserts the row at the very beginning for `Negative Index` First of all i expected that an IndexError be raised in all cases. Because i think it should follow something like a = [1, 2, 3] and del a[ 10 ] which raises an error. But even if not error then it should be more consistent with the indices. Is it the way the things are expected to work ? -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/5f4fb1ab-2f0d-4264-8960-754d57ee1317%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
