[R] Rotate array by 90°

[Chel Hee Lee]

 > lapply(1:2, function(x) t(A[rev(1:3),,x]))
[[1]]
      [,1] [,2] [,3]
[1,] "g"  "d"  "a"
[2,] "h"  "e"  "b"
[3,] "i"  "f"  "c"

[[2]]
      [,1] [,2] [,3]
[1,] "p"  "m"  "j"
[2,] "q"  "n"  "k"
[3,] "r"  "o"  "l"

 >

Is this what you are looking for?  I hope this helps.

Chel Hee Lee

On 02/05/2015 03:17 PM, Karim Mezhoud wrote:
> Dear aal,
>
> Is there a way to rotate array or a cube of matrices by Y axis?
>
>
> MatLab example:
>
> A = cat(3,{'a' 'b' 'c';'d' 'e' 'f';'g' 'h' 'i'},{'j' 'k' 'l';'m' 'n'
> 'o';'p' 'q' 'r'})
>
> A(:,:,1) =
>
>      'a'    'b'    'c'
>      'd'    'e'    'f'
>      'g'    'h'    'i'
>
>
> A(:,:,2) =
>
>      'j'    'k'    'l'
>      'm'    'n'    'o'
>      'p'    'q'    'r'
>
> Rotate the cell array by 270 degrees.
>
> B = rot90(A,3)
>
> B(:,:,1) =
>
>      'g'    'd'    'a'
>      'h'    'e'    'b'
>      'i'    'f'    'c'
>
>
> B(:,:,2) =
>
>      'p'    'm'    'j'
>      'q'    'n'    'k'
>      'r'    'o'    'l'
>
>
> karim
>
> 	[[alternative HTML version deleted]]
>
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