[R] (Most efficient) way to make random sequences of random sequences
Emmanuel Levy
emmanuel.levy at gmail.com
Tue Aug 21 22:49:13 CEST 2007
Hi,
I was wondering the what would be the (most efficient) way to generate
a sequence
of sequences, i mean:
if I have 1,2 and 3.
I'd like to generate a sequence of length N*3 (N ~ 1,000,000 or more)
Where random permutations of the sequence 1,2,3 follow each other.
i.e 1,2,3,1,3,2,3,2,1
/!\ The thing is that there should never be twice the same number of
in the same sub-sequence, meaning that this is different from
generating a vector with the numbers 1,2 and 3 randomly distributed.
Any suggestion very welcome! Thanks,
Emmanuel
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