[R] permutates and/or samples a matrix

[Gabor Csardi]

What exactly is the question? Selecting/permuting rows?

M[sample(length=nrow(M), count), ]

Selecting/permuting columns?

M[ , sample(length=ncol(M), count) ]

Permuting elements?

structure(sample(M), dim=dim(M))

Selecting elements?

sample(M, count)

Gabor

On Thu, Jan 31, 2008 at 09:10:11PM +0800, Ng Stanley wrote:
> Hi,
> 
> sample(x) only permutates and/or samples from a vector, which I can't use
> for a matrix. Please help.
> 
> Thanks
> Stanley
> 
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> 
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-- 
Csardi Gabor <csardi at rmki.kfki.hu>    UNIL DGM