On Jan 4, 2012, at 10:32 AM, jeremy wrote: > Hi all, > > I'm trying to combine exhaustively several character arrays in R like: > x=c("one","two","three") > y=c("yellow","blue","green") > z=c("apple","cheese") > > in order to get concatenation of > > x[1] y[1] z[1] ("one yellow apple") > x[1] y[1] z[2] ("one yellow cheese") > x[1] y[2] z[1]("one blue apple") > ... > x[length(x)] y[length(y)] z[length(z)] ("three green cheese") > > Anyone has a solution ? > Thank in advance
See ?expand.grid and ?paste DF <- expand.grid(x, y, z) > DF Var1 Var2 Var3 1 one yellow apple 2 two yellow apple 3 three yellow apple 4 one blue apple 5 two blue apple 6 three blue apple 7 one green apple 8 two green apple 9 three green apple 10 one yellow cheese 11 two yellow cheese 12 three yellow cheese 13 one blue cheese 14 two blue cheese 15 three blue cheese 16 one green cheese 17 two green cheese 18 three green cheese > with(DF, paste(Var1, Var2, Var3)) [1] "one yellow apple" "two yellow apple" "three yellow apple" [4] "one blue apple" "two blue apple" "three blue apple" [7] "one green apple" "two green apple" "three green apple" [10] "one yellow cheese" "two yellow cheese" "three yellow cheese" [13] "one blue cheese" "two blue cheese" "three blue cheese" [16] "one green cheese" "two green cheese" "three green cheese" 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.