---Graham Parkhouse wrote: > sum=: 10 12 14 15 15 17 18 19 20 22 17 19 20 21 22 24 24 25 27 29 > Next I would like to get a list of the indices of sum whose > values only appear once, i.e. > 0 1 2 6 13 17 18 19 > > Is there an altogether different way to get the result I want?
Actually here is another way: (] -. ] #~ -.@:~:)@:i.~ sum 0 1 2 6 13 17 18 19 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
