What about this?

B <- 500
X <- matrix(rnorm(B*20), ncol = B)
colnames(X) <- paste('x', 1:B, sep = "")
head(X)

Thus, each column correspond to a sample of 20 numbers from a standard
normal distribution.

HTH,
Jorge.-


On Thu, Feb 9, 2012 at 8:38 AM, Blaz Simcic <> wrote:

> Dear all,
> I would like to generate 500 matrices of 20 numbers from
> standard normal distribution with names x1,x2,x3,….x500.
> I tried with loop for, but I don’t know how to name matices :
> for (i in 1:500)  {
>    x[[i]] <- matrix(rnorm(20), 4)     }
> Any suggestion?
> Thanks,  Blaž
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>
>
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