[R] sort columns

[Ista Zahn]

Hi Frederik,
Not exactly clear how you want them sorted, but one of these two is
probably what you want:

mat <- matrix(100:1, ncol=10)
mat.1 <- apply(mat, 2, sort)
mat.2 <- mat[order(10:1),]

Best,
Ista


On Fri, Feb 26, 2010 at 12:41 PM, frederik vanhaelst
<frederik.vanhaelst at gmail.com> wrote:
> Hello,
>
> i have a 50*100 matrix, with real numbers. How do i sort each column?
> Now i sort it with a for-loop but this take a lot of time...
>
> Thank you,
>
> Frederik
>
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>
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-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org