I do not understand the question, but here's something that operates on i. 6 3:
(0 2 |: _2 ]\ ]) i. 6 3 Note that this is almost identical to Roger Hui's suggestion. -- Raul On Wed, Nov 21, 2012 at 1:12 PM, Alex Giannakopoulos <[email protected]> wrote: > Well, I'm having a bit of trouble getting my head around "key", I'll keep > at it though... > However I was inspired by Raul's solution to come up with something that > worked and I understood. > Well, sort of understood anyway, why does the evenoddrows verb not need to > be (0 2 |: @ reshape2s) ? > > reshape2s =. ;$~(2%~0{$),2,1{$ > evenoddrows =. 0 2 |: reshape2s > evenoddrows i. 8 4 > 0 1 2 3 > 8 9 10 11 > 16 17 18 19 > 24 25 26 27 > > 4 5 6 7 > 12 13 14 15 > 20 21 22 23 > 28 29 30 31 > > Hope that's not too inefficient > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
