Combination of 6 items taken 2 at a time: comb=: ((= +/"1) |.@:I.@# ]) #:@i.@(2&^)
|: 2 comb 6 0 0 0 0 0 1 1 1 1 2 2 2 3 3 4 1 2 3 4 5 2 3 4 5 3 4 5 4 5 5 How can I box each column with the vertical pair of numbers in each box? Skip ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
