Dear all, I have an array of strings a <- c("2008q3","2005q1","2004q3") I would like to add to each a[i], with i = 1,2,3 the following string "IMT", such that in the end I could get b <- c("IMT2008q3","IMT2005q1","IMT2004q3") Is it possible to accomplish this without a loop command? Thank you. Best, Borissssssssssssssss --