[R] can I rotate a matrix

[Phil Spector]

I belive that

> apply(t(mat),2,rev)
      [,1] [,2] [,3]
[1,]    1    6    3
[2,]    2    2    5
[3,]    1    3    4

will do what you want.  I'll leave it up to you to decide
whether it's straightforward.
 					- Phil Spector
 					 Statistical Computing Facility
 					 Department of Statistics
 					 UC Berkeley
 					 spector at stat.berkeley.edu


On Thu, 18 Mar 2010, dc896148 wrote:

>
> useR's,
> I want to be able to rotate a matrix 90 degrees, clockwise.  For example,
>> mat
>     [,1] [,2] [,3]
> [,1]   1    2     1
> [,2]   3    2     6
> [,3]   4    5     3
>
> I want to rotate it, so that it looks like this...
>     [,1] [,2] [,3]
> [,1]   4    3     1
> [,2]   5    2     2
> [,3]   3    6     1
>
> Does anyone know a quick and straightforward way to do this?
>
> Thanks in advance.
> -- 
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