Hi Desmond,

You might try

> sort(apply(expand.grid(v1, v2), 1, paste, collapse = "", sep = ""))
[1] "a1" "a2" "a3" "b1" "b2" "b3"

HTH,
Jorge


On Sat, Aug 27, 2011 at 12:54 PM, Campbell, Desmond <> wrote:

> Dear R-help readers,
>
> I'm sure this problem has been answered but I can't find the solution.
>
> I have two vectors
> v1 <- c("a","b")
> v2 <- c(1,2,3)
> I want an easy way to produce every possible combination of v1, v2 elements
> Ie I want to produce
> c("a1","a2","a3", "b1","b2","b3")
>
> regards
> Desmond
>
> Desmond Campbell
> Dept of Biostatistics and Computing, Institute of Psychiatry (KCL),
> PO Box 20, De Crespigny Park, Denmark Hill London, SE5 8AF
>
> Tel 020 7848 0309
> Email D.Campbell@iop.kcl.ac.uk<mailto:D.Campbell@iop.kcl.ac.uk>
>
>
>
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