R help - Apr 2010 - Combinations with restrictions

Hi!

 Is there any easy/fast way to combine vectors with restrictions?

Example:

a=c(1,2,3), b=c(4,5,6), c=c(7,8,9)

I want all combinations of this 3 vectors with length=2.

Like this:
1,4
1,5
1,6
1,7
1,8
1,9
2,4
2,5
2,6
2,7
... and so on.

Thanks in advance.

	[[alternative HTML version deleted]]

Hi Cláudio,

Try this:

require(gtools)
combinations(10, 2)
combinations(10, 2, repeats = TRUE)

HTH,
Jorge


2010/4/23 Cláudio Sá <>
> Hi!
>
>  Is there any easy/fast way to combine vectors with restrictions?
>
> Example:
>
> a=c(1,2,3), b=c(4,5,6), c=c(7,8,9)
>
> I want all combinations of this 3 vectors with length=2.
>
> Like this:
> 1,4
> 1,5
> 1,6
> 1,7
> 1,8
> 1,9
> 2,4
> 2,5
> 2,6
> 2,7
> ... and so on.
>
> Thanks in advance.
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@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.
>
	[[alternative HTML version deleted]]