I have an arbitrary matrix, x
0 1 2 3 4 5 6 7 8 9 0 1 and wish to apply verbs along the diagonals. The oblique verb, /. , allows me to do this and with the suffix. \., I can keep the intermediate results So, +/\./. x produces matrix 0 0 0 5 4 0 15 13 8 18 15 9 7 0 0 1 0 0 which is almost what I want but what I would really like are the cumulative results along the diagonals but in the shape of the original matrix. Thus summing the original matrix x above would produce 0 5 15 18 4 13 15 7 8 9 0 1 I looked in the forum archive and couldn't find anything on this. Is there a simple way of producing my desired matrix from the original? Bob ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
