On Nov 1, 2010, at 12:46 PM, Louis Plough wrote: > Hi, > I am trying to generate all possible permutations (choose 2) of a vector, b, > for example--using 'combn' the combinations in only one direction are > generated... > >> b<-c(.1,.2,.3) >> combn(b,2) > [,1] [,2] [,3] > [1,] 0.1 0.1 0.2 > [2,] 0.2 0.3 0.3 > > [1,] 0.1 0.2 0.3 0.2 0.3 0.3 These > should also be there. > [2,] 0.1 0.2 0.3 0.1 0.1 0.2 > > Is there another R function that can do this?? > > Thanks, > Louis
See ?expand.grid b <- c(.1, .2, .3) > expand.grid(b, b) Var1 Var2 1 0.1 0.1 2 0.2 0.1 3 0.3 0.1 4 0.1 0.2 5 0.2 0.2 6 0.3 0.2 7 0.1 0.3 8 0.2 0.3 9 0.3 0.3 HTH, Marc Schwartz ______________________________________________ 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.
