[R] sample

[Adaikalavan Ramasamy]

See below.

On Thu, 2005-02-10 at 14:53 -0800, T. Murlidharan Nair wrote:
> Just to explain my previous mail, here is the output I get.  
> 
> 
>  > dim(tissue.exp)
> [1] 1532   20

What is this object ? Try class(tissue.exp)

>  > pick<-sample(tissue.exp,5,replace=TRUE)
>  > dim(pick)
> [1] 1532    5

>From help(sample) :

    sample(x, size, replace = FALSE, prob = NULL)

    x: Either a (numeric, complex, character or logical) vector of
       more than one element from which to choose, or a positive
       integer.

x has to be a vector or positive integer integer. I am not sure how you
got "sample" to work on tissue.exp in the first place. Maybe you got
your own version of "sample".


>  > tissue.exp.t<-t(tissue.exp)
>  > dim(tissue.exp.t)
> [1]   20 1532
>  > pick<-sample(tissue.exp.t,5,replace=TRUE)
>  > dim(pick)
> NULL
> 
> --------
> Thanks ../Murli
> 
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