I think these examples may help. 5!:4 <'mean' ┌─ / ─── + ──┼─ % └─ # 9!:2'' 5 mean +/ % # 9!:3]4
mean ┌─ / ─── + ──┼─ % └─ # -- (B=) ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
