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
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