How to sort a matrix or dataframe by two columns?
Yes, you can: m <- matrix( sample(1:5, 20, rep=TRUE), nc=2) m[ order(m[,1],m[,2]), ] Gabor
On Fri, Feb 6, 2009 at 11:29 PM, Bill Hyman <billhyman1 at yahoo.com> wrote:
Dear all, I have a matrix data and would like to sort it by col 1 first and then sort it by col 2. Can I do it in R? Thanks a lot! Bill
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Gabor Csardi <Gabor.Csardi at unil.ch> UNIL DGM