On Mon, Jun 8, 2009 at 3:04 PM, baptiste auguie <baptiste.aug...@gmail.com>wrote:
> 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 that >> >> >> >>> combine(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. >> >> > I guess you actually want, > > [[1]] > [1] "a" "b" > > [[2]] > [1] "a" "c" # not "a" "b" again Yes I made a mistake. Thank you. Mvh., Marie > > > [[3]] > [1] "b" "c" > > > if so, try > > ?combn > > combn(v,2) > [,1] [,2] [,3] > [1,] "a" "a" "b" > [2,] "b" "c" "c" > > > HTH, > > baptiste > > -- > _____________________________ > > Baptiste AuguiƩ > > School of Physics > University of Exeter > Stocker Road, > Exeter, Devon, > EX4 4QL, UK > > Phone: +44 1392 264187 > > http://newton.ex.ac.uk/research/emag > ______________________________ > > [[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.