How to randomize a vector

问题:

I would like to randomly reorganize the order of the numbers in a vector, in a simple one-line command?

My particular vector V has 150 entries for each value from 1 to 10:

V <- rep(1:10, each=150)

回答1:

Yes.

sample(V)

From ?sample:

For ‘sample’ the default for ‘size’ is the number of items inferred from the first argument, so that ‘sample(x)’ generates a random permutation of the elements of ‘x’ (or ‘1:x’).

回答2:

Use sample function

V<-rep(1:10, each=150)

set.seed(001) # just to make it reproducible
sample(V)