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
