[R] Generate strings from multiple variables

[R. Michael Weylandt]

do.call(function(x,y) paste0("A",x,"_","B",y),expand.grid(x = A,y = B))

seems to be a place to start. Robust generalization seems a hair
tricky -- I'll mull on it.

Michael

On Fri, May 4, 2012 at 9:10 AM, Johannes Radinger <JRadinger at gmx.at> wrote:
> Hi,
>
> it is easiest to explain what I want to do by an example:
>
> lets assume there are two factors/variables:
> A <- c(1,2,3)
> B <- c(1,3,3)
>
> Now I would like to generate a list of strings that should look like
> ("A1_B1","A1_B2","A2_B1","A2_B2"). So actually the string
> contains all possible combinations of A and B (separated by _). This should
> be also possible for more variables. Is there simple way
> to that? I thought about looping over A and B (nested for-loop)
> but maybe there is a straight foward solution to get such strings.
>
> /johannes
>
>
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>
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