[R] Odp: all combinations of the elements of two vectors

[Petr PIKAL]

Hi
> 
> 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")

Another option is

z<-outer(x,y, paste, sep="")
dim(z)<-NULL
> z
[1] "a1" "b1" "c1" "a2" "b2" "c2" "a3" "b3" "c3"

which gives the result in different order

or

z<-as.vector(t(z))
> z
[1] "a1" "a2" "a3" "b1" "b2" "b3" "c1" "c2" "c3"

Which gives you desired order.

Regards
Petr

> 
> 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 at iop.kcl.ac.uk<mailto:D.Campbell at iop.kcl.ac.uk>
> 
> 
> 
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