Beautiful. The insight of splitting in 2 by 1 submatrices lead into a more compact and elegant code than what I had.
Thanks Henry. ________________________________ From: Programming <[email protected]> on behalf of Henry Rich <[email protected]> Sent: Wednesday, December 11, 2019 7:09 PM To: [email protected] <[email protected]> Subject: Re: [Jprogramming] Submatrices ({. ,.&.> }.)"1@:((1 1,:2 1)&(<;._3)) a Henry Rich On 12/11/2019 6:43 PM, Nimp O wrote: > Hello everyone, > > > Given > ]a=: 3 4 $ 1 1 1 _1 4 2 1 _1 9 3 1 1 > > > 1 1 1 _1 > > 4 2 1 _1 > > 9 3 1 1 > > I want to find the submatrices: > > f a > ┌───┬───┬────┐ > │1 1│1 1│1 _1│ > │4 2│4 1│4 _1│ > ├───┼───┼────┤ > │4 2│4 1│4 _1│ > │9 3│9 1│9 1│ > └───┴───┴────┘ > > I have a quite lengthy solution for this task. > I was wondering if anyone can come up with something more J-like and elegant > than what I have. > > Thanks. > > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
