Œd - Matrix Antidiagonals
Tags: miscellaneous , matrix , vectorize
This atom is monadic, which means it takes one argument.
Return the antidiagonals of
z, starting with the main antidiagonal.
Following the main diagonal, each diagonal is outputted going to the left. Diagonals will not wrap around, so
[1,2],[3,4] ŒD returns
[[2, 3], , ] and not
[[2, 3], [1, 4]].