None of these beat Roger's by your criteria, but here are a few: (,,.)&.>/ i.3 3 <"_1|:,: i.3 3 (0 1,:3 1) <;.3 i.3 3
The second features a rare specimen--monadic |: on an array of rank greater than 2. Of course it looks a bit uglier when placed in tacit form. Marshall On Wed, Nov 19, 2014 at 05:05:16PM -0500, Henry Rich wrote: > boxcols i. 3 3 > +-+-+-+ > |0|1|2| > |3|4|5| > |6|7|8| > +-+-+-+ > > Can you write boxcols? > > Can you write it tacitly without using a hook, fork, compose, or appose? > > Henry Rich > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
