Hi R users,
I would like to know how to sort a matrix according a different order of
colnames (or rownames) ,e.g.,
mx = matrix(rnorm(1:20),5,4)
colnames(mx) = letters[1:4]
rownames(mx) = letters[1:5]
mx
a b c d
a 0.02362598 -0.7033460 0.8106089 -1.03456219
b -0.45021522 -1.5769522 0.1770634 0.27997249
c 1.34732392 0.2956623 2.0027231 -0.85321627
d 0.82314457 1.2698347 -0.5468151 0.05806375
e -0.18668401 -0.4210383 0.6263465 -0.18889031
(new.col.names = sample(letters[1:4]))
[1] "a" "b" "d" "c"
so the new matrix has to be ordered according the new.col.names,i.e.,
a b d c
a 0.02362598 -0.7033460 -1.03456219 0.8106089
b -0.45021522 -1.5769522 0.27997249 0.1770634
c 1.34732392 0.2956623 -0.85321627 2.0027231
d 0.82314457 1.2698347 0.05806375 -0.5468151
e -0.18668401 -0.4210383 -0.18889031 0.6263465
Hope this is not a "basic question"
Thank you for your help.
Paolo
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