Dear R users, I have a simple problem I cannot solve, but I sure you can help.
I have two vector, let say > tmp1 <- c("a", "a", "b", "c") > tmp2 <- c("a", "a", "b", "c", "c", "d") and I want to create a matrix of two column for which I have all the combinations of the same character, let say like this > tmp3 tmp1 tmp2 [1,] "a" "a" [2,] "a" "a" [3,] "a" "a" [4,] "a" "a" [5,] "b" "b" [6,] "c" "c" [7,] "c" "c" how can I perform this task? thank you! [[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.