Re: [R] Combinations with two part column

From: Gabor Grothendieck <ggrothendieck_at_gmail.com>
Date: Wed 18 May 2005 - 03:00:18 EST

On 5/17/05, Sofyan Iyan <sofyan.iyan@gmail.com> wrote:
> Dear R-helpers,
> I am a beginner using R.
> This is the first question in this list.
> My question, Is there possible to make combinations with two part column?
> If I have a number 1,2,3,4,5,6,7,8. I need the result something like below:
>
> 1,2,3,4,5 6,7,8
> 1,2,3,4,7 5,6,8
> 2,3,4,5,6 1,7,8
> 1,2,3,6,7 4,5,8
> 1,2,3,4,8 5,6,7
> 3,4,6,7,8 1,2,5
> ....
>

Try this:

library(gtools)
t(apply(combinations(8,5), 1, function(x) c(x,setdiff(1:8, x))))



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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Wed May 18 03:12:54 2005

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