Hi Piet, Maybe show us what you would want to do with higher dimensions? Or a less symmetric 2 dimensional shape?
For shape 2 2, I would use the even simpler |: m 0 2 1 3 Hope this helps. Cheers, bob > On Sep 6, 2023, at 14:26, Brian Schott <schott.br...@gmail.com> wrote: > > ,./0 1 {"1 m ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm