[R] Puzzled at generating combinations

[Henrique Dallazuanna]

Try:

expand.grid(col2, col1)

On 18/03/2008, Ajay Shah <ajayshah at mayin.org> wrote:
> I have two data frames. Suppose the first has rows
>
> r1
> r2
> r3
>
> and the second has rows
>
> R1
> R2
> R3
>
> I'd like to generate the data frame:
>
>    r1   R1
>    r1   R2
>    r1   R3
>    r2   R1
>    r2   R2
>    r2   R3
>    r3   R1
>    r3   R2
>    r3   R3
>
> How would I go about doing this? I'm sure there's a clean way to do it
> but I find myself thinking in loops.
>
> --
> Ajay Shah                                      http://www.mayin.org/ajayshah
> ajayshah at mayin.org                             http://ajayshahblog.blogspot.com
> <*(:-? - wizard who doesn't know the answer.
>
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> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O