[R] shuffling a vector

[Marc Schwartz]

On Mon, 2003-11-10 at 10:51, Marc Schwartz wrote:
> On Mon, 2003-11-10 at 10:28, Rajarshi Guha wrote:
> > Hi,
> >   I'me trying to write  a function that will shuffle a vector. At the
> > moment I'm baically making a vector of randomized indices and then
> > making  a new vector from the original one using these random indices.
> > 
> > However, is there an alternative (more elegant) method to do this? I
> > tried help.search('shuffle') but it does'nt return anything relevant.
> > 
> > Thanks,
> 
> 
> You might want to look at the permute() function in the 'gregmisc'
> package.
> 
> Example:
> 
> > x <- 1:10
> > permute(x)
>  [1]  1  3  2  6  5  7 10  8  9  4
> 
> HTH,
> 
> Marc Schwartz


A quick add:

Also the sample() function in the base package:

> sample(x)
 [1]  4 10  5  3  7  2  1  6  9  8

See ?sample for more information. sample() is also more flexible in
terms of options if you want more than just a permutation of the
original vector.

HTH,

Marc