[R] Function for Generating all Permutations with Repetition

[Dimitris Rizopoulos]

Have a look at expand.grid(), e.g.,

expand.grid(rep(list(0:1), 3))


I hope it helps.

Best,
Dimitris


On 3/5/2012 9:46 AM, Martin Spindler wrote:
> Dear all,
>
> I am looking for a function in R which returns all possible permutations of an object x with r number of repitions. For example
>
> If x<- c(0,1) and r<-3 the result should be
>
> 0 0 0
> 0 0 1
> 0 1 0
> 0 1 1
> 1 0 0
> 1 0 1
> 1 1 0
> 1 1 1
>
> and consist of 2^3=8 elements.
> Unfortunately, I have found only functions which return the combinations for "choose n over k" but not the case described above.
> I would appreciate hints and help highly.
>
> Best,
>
> Martin
>
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>
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-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center

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