Re: [R] expand.grid using a matrix and a vector as input

One possibility is to use something like the following: a1 <- matrix(1:4, 2, 2) a2 <- c(8, 9) cbind(a1[rep(1:nrow(a1), length(a2)), ], rep(a2, each = nrow(a1))) I hope it helps. Best, Dimitris On 3/15/2012 1:33 PM, eugen pircalabelu wrote: Hello R-users, I have the following question, fo

[R] expand.grid using a matrix and a vector as input

  Hello R-users,   I have the following question, for which my search did not really return any usable result. If I have a matrix a1, and a vector a2 like below   a1<-matrix(c(1:4),2,2) a2<-c(8,9)   is there any function like the expand.grid (or some clever calling of the function) such that it