Here's the obvious tacit approach: tailshape1=: [ $"1 _1 ] ]\~ [: - [: */ [
Here's an explicit approach: tailshape2=:4 :'(-*/x) (x&$)\ y' I think the explicit approach should be more efficient for bulky V. -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
