FYI this was introduced as a compatible extension in Dyalog APL 13.0, along
with a similar extension to Take and Drop:
MAT
11 12 13 14
21 22 23 24
31 32 33 34
2↑MAT
11 12 13 14
21 22 23 24
1↓MAT
21 22 23 24
31 32 33 34
Jay.
On 31 October 2016 at 23:34, Christian Robert <christian.rob...@polymtl.ca>
wrote:
> )sic
>
>
> MAT
> 11 12 13 14
> 21 22 23 24
> 31 32 33 34
>
> 2 1 ⌷ MAT
> 21
> 2 (1 2) ⌷ MAT
> 21 22
>
> MAT[3;]
> 31 32 33 34
> 3 ⌷ MAT
> RANK ERROR
> 3⌷MAT
> ^ ^
>
> ⍝ I was expecting the whple third line as result
>
> Xtian.
>
>
