[R] help : matrix row/column random mixing
droberts at montana.edu
Wed Nov 2 23:13:19 CET 2005
There are several bootstrap packages available at CRAN that probably
provide an elegant solution, but simply permuting the matrix is pretty easy
> data <- matrix(1:100,nrow=5) # matrix of 5 rows and 20 columns
> x <- data[sample(1:5),] # permute the rows
> y <- x[,sample(1:20)] # permute the columns
to really scamble the matrix
> z <- matrix(sample(data),nrow=5)
booop booop wrote:
> Could anybody help me in mixing the matrix values randomly (first rows and then columns)...
> for eg putting the 1 st row in the place of 3 rd and 3rd in place of 4 th and 4th in place of 1st row ...something like this in columns also..
> Please suggest me some ways..
> thanks a lot..
> with regards,
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