Hi folks,

I want to sort a matrix row-by-row and create a new matrix that contains the corresponding colnames of the original matrix.

E.g.

> set.seed(123)
> a <- matrix(rnorm(20), ncol=4); colnames(a) <- c("A","B","C","D")
> a
         A       B       C       D
[1,] -0.56047565 1.7150650 1.2240818 1.7869131
[2,] -0.23017749 0.4609162 0.3598138 0.4978505
[3,] 1.55870831 -1.2650612 0.4007715 -1.9666172
[4,] 0.07050839 -0.6868529 0.1106827 0.7013559
[5,] 0.12928774 -0.4456620 -0.5558411 -0.4727914

I want to obtain a matrix that looks like this

A C B D
A C B D
D B C A
B A C D
C D B A

How best to achieve this? I was able to do it for the max and min of each row by which.min, which.max, but for the entire thing, I'm stymied.

Thanks,

Murali

______________________________________________
R-help@(protected)
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.