one way is:
combn(c("a", "b", "c"), 2)I hope it helps. Best, Dimitris Marie Sivertsen wrote:
Dear list, I have a vector of elements which I want to combined each with each, but none with itself. For example,v <- c("a", "b", "c")and I need a function 'combine' such thatcombine(v)[[1]] [1] "a" "b" [[2]] [1] "a" "b" [[3]] [1] "b" "c" I am not very interested in the orders of the output items for now, and the form can be something differs from list, like matrix or data frame. I know of 'expand.grid', but it will combine each item with each item including itself, so not what I wants. Could you help me please. Thank you. Mvh., Marie [[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.
-- Dimitris Rizopoulos Assistant Professor Department of Biostatistics Erasmus University Medical Center Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands Tel: +31/(0)10/7043478 Fax: +31/(0)10/7043014 ______________________________________________ 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.
