I spent a lot of time on this but I can't figure out how to do that: I have: "a" (6 x 4): 1 0 0 1 1 1 0 1 1 1 0 1 1 1 0 1 0 1 1 1 0 0 0 0
and "b" (1 x 6) like: 1 2 1 3 4 6 I'd like to get the average of those in "b" w.r.t column values in "a" which are equal to 1. At the end I'd get the averages (4 x 1 or 1 x 4), like: (1 + 2 + 1 + 3) % 4 (2 + 1 + 3 + 4) % 4 (4) (1 + 2 + 1 + 3 + 4) % 5 could you shed some light on this? -- View this message in context: http://old.nabble.com/array-operation-and-take-average-tp34477891s24193p34477891.html Sent from the J Programming mailing list archive at Nabble.com. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
