Re: [R] Puzzled at generating combinations

From: Henrique Dallazuanna <wwwhsd_at_gmail.com>
Date: Tue, 18 Mar 2008 13:40:40 -0300

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@mayin.org http://ajayshahblog.blogspot.com
> <*(:-? - wizard who doesn't know the answer.
>
> ______________________________________________
> R-help_at_r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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

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Received on Tue 18 Mar 2008 - 16:59:24 GMT

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