]matrix=: (^/ }:) >:i.5    NB. make and show example matrix
1  1   1   1
2  4   8  16
3  9  27  81
4 16  64 256
5 25 125 625
   |: matrix
1  2  3   4   5
1  4  9  16  25
1  8 27  64 125
1 16 81 256 625