This is an easy one, but it's escaping me after searching and trying several things
How can I mimic this with a 2d array? I want to only return the rows the match a boolean expression Works a=: i. 10 (a < 5) # a 0 1 2 3 4 Does not work the way I want... a=:i. 5 10 a 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 (a < 10) 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (a < 10) # a |length error This kind of does it: (a < 10) #"1 a 0 1 2 3 4 5 6 7 8 9 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
