> 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.