Depending on what you want, you probably want to start with expand.grid(): # All combinations of test with test > pairs1 <- expand.grid(test, test) > nrow(pairs1) [1] 36 # Exclude cases that differ only in the order of the values # E.g. (1, 5001), but not (5001, 1), also (1, 1), etc are included > pairs2 <- pairs1[pairs1[,1] <= pairs1[,2],] > nrow(pairs2) [1] 21 # Same as pairs2 but (1, 1), etc are not included > pairs3 <- pairs1[pairs1[,1] < pairs1[,2],] > nrow(pairs3) [1] 15
------------------------------------- David L Carlson Department of Anthropology Texas A&M University College Station, TX 77840-4352 -----Original Message----- From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Sarah Goslee Sent: Thursday, December 18, 2014 9:06 AM To: Alaios Cc: R-help@r-project.org Subject: Re: [R] combinations between two vectors I can't quite tell what you want: your example output is either unclear to me or mangled by posting in HTML (please don't). Is expand.grid(test, test) what you want, or partway to what you want? Sarah On Thu, Dec 18, 2014 at 9:56 AM, Alaios via R-help <r-help@r-project.org> wrote: > Hi all,I am looking for a function that would give me all the combinations > between two vectors.Lets take as example the > > test<-seq(1,30000,by=5000) > Browse[2]> test > [1] 1 5001 10001 15001 20001 25001 > I want all the combinations between two times the test... I think this is > called permutation so a function that could do permutation(test,test)and > produce the following > 1,11,50011,100011,15001.... > 3,13,5001...25001,20001,25001,25001 > is there such a function ? > RegardsAlex > > > [[alternative HTML version deleted]] > -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ 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. ______________________________________________ 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.