More specific to what I want, based on looking at diagonal relationships within data, I wish to update a value in the original matrix, but I think the original question is easier more flexible. I can't think of a better way than to generate indexes,
(< 0 0) ,&< (1 0 ; 0 1) .... ----- Original Message ----- From: Pascal Jasmin <[email protected]> To: Programming Forum <[email protected]> Sent: Wednesday, February 17, 2016 11:40 AM Subject: [Jprogramming] an inverse to oblique </. i.5 5 +-+---+------+---------+------------+----------+--------+-----+--+ |0|1 5|2 6 10|3 7 11 15|4 8 12 16 20|9 13 17 21|14 18 22|19 23|24| +-+---+------+---------+------------+----------+--------+-----+--+ is there a way starting with the above boxes, to make the i. 5 5 table (without relying on magic within the data) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
