Here is as explicit verb which includes a global copula embedded in a tacit expression.
sum=: 3 : 's=:+/y' mean=:sum % # mean 2 4 5 6 4.25 s 17 mean +---+-+-+ |sum|%|#| +---+-+-+ sum +-+-+------+ |3|:|s=:+/y| +-+-+------+ mean f. +------------+-+-+ |+-+-+------+|%|#| ||3|:|s=:+/y|| | | |+-+-+------+| | | +------------+-+-+ This works too. mean=: (3 : 's=:+/y') % # mean +------------+-+-+ |+-+-+------+|%|#| ||3|:|s=:+/y|| | | |+-+-+------+| | | +------------+-+-+ ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
