[R] How to get all combinations between two character vectors?

[Eik Vettorazzi]

or even simpler
paste(rep(x,each=length(y)),y,sep="")


Am 11.03.2011 12:44, schrieb Eik Vettorazzi:
> Hi Rainer,
> I don't know a function for literally substituting "THEFUNCTION", but
> x <- c("a", "b")
> y <- c("x", "y")
> sort(levels(interaction(x,y,sep="")))
> 
> or
> 
> as.vector(t(outer(x,y,paste,sep="")))
> 
> will work. "sort" and "t" respectively here are used to produce the
> desired order.
> hth.
> 
> 
> Am 11.03.2011 11:53, schrieb Rainer M Krug:
>> Hi
>>
>> I know there is a function - I have used it before - but I always forget
>> what it is called...
>>
>> I need the combination of two character vectors, i.e:
>>
>> x <- c("a", "b")
>> y <- c("x", "y")
>>
>> z <- THEFUNCTION(x, y)
>>
>> z == c("ax", "ay", "bx", "by")
>>
>> I promise I will write the name of the function on my desk!
>>
>> Thanks,
>>
>> Rainer
>>
> 
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-- 
Eik Vettorazzi
Institut für Medizinische Biometrie und Epidemiologie
Universitätsklinikum Hamburg-Eppendorf

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