a#~a *./ . < 10 if you want all elements in the row to be less than 10, or a#~a +./ . < 10 if you want any element in a row to be less than 10.
On Wed, Feb 19, 2014 at 5:50 PM, Vijay Lulla <[email protected]> wrote: > (*./"1 a<10) # a > > maybe? > > > On Wed, Feb 19, 2014 at 5:40 PM, Joe Bogner <[email protected]> wrote: > > > 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 > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > -- Devon McCormick, CFA ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
