permutate elements in a vector
Wendy wrote
Hi all, I have a vector, e.g., A = c(10, 20, 30, 40). This 4 numbers have 4! = 24 different combination. I want to generate a matrix with one combination in one row, so the output would be B = 10 20 30 40 10 40 20 30 ... Does anyone know how to do this easily in R? Thank you very much. Wendy
You want permutations not combinations. library(e1071) permutations(4) * 10 or library(gtools) A <- 10*(1:4) permutations(4,4,A) Berend -- View this message in context: http://r.789695.n4.nabble.com/permutate-elements-in-a-vector-tp4127821p4128227.html Sent from the R help mailing list archive at Nabble.com.