> combnWithRepetition <- function(n, k) combn(n+k-1, k) - seq(from=0, len=k)
> combnWithRepetition(2, 2)
[,1] [,2] [,3]
[1,] 1 1 2
[2,] 1 2 2
> combnWithRepetition(3, 2)
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] 1 1 1 2 2 3
[2,] 1 2 3 2 3 3
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Tue, Jun 9, 2015 at 2:11 AM, Thomas Chesney <
thomas.ches...@nottingham.ac.uk> wrote:
> Does anyone know of a function that will return all unordered combinations
> of n elements from a list with repetition?
>
> The combs function in caTools will do this without repetition:
>
> combs(1:2, 2)
>
> [,1] [,2]
> [1,] 1 2
>
> What I'd like is:
>
> 1 1
> 1 2
> 2 2
>
> Thank you,
>
> Thomas Chesney
>
>
>
> This message and any attachment are intended solely for the addressee
> and may contain confidential information. If you have received this
> message in error, please send it back to me, and immediately delete it.
>
> Please do not use, copy or disclose the information contained in this
> message or in any attachment. Any views or opinions expressed by the
> author of this email do not necessarily reflect the views of the
> University of Nottingham.
>
> This message has been checked for viruses but the contents of an
> attachment may still contain software viruses which could damage your
> computer system, you are advised to perform your own checks. Email
> communications with the University of Nottingham may be monitored as
> permitted by UK legislation.
>
> ______________________________________________
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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]]
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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.
