[R] randomize the order of rows in a matrix or table

[Sean Davis]

There is probably a neater solution, but....

x <- matrix(1:1000,nrow=500)
y <- runif(500)
z <- x[order(y),]

On Dec 8, 2004, at 8:23 AM, Andreas wrote:

> Hello,
>
> is there any function to randomize the order of rows in matrix. My 
> dataset
> for suport vector mashines is in the order first the samples of class1 
> and
> then the samples for class2. For the training of the svm I need this 
> dataset
> randomized in its order.
>
> regards Andreas
>
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