Hi, I'm a new R user, and struggeling with the basics (...sigh) I would like to combine 2 vectors : d1: "S1" "S2" "S3" "S4" 1 3 5 6 and d2: "S1" "S3" "S5" 3 3 2 to give a result: "S1" "S2" "S3" "S4" "S5" 1 3 5 6 Na 3 Na 3 Na 2 or better still: "S1" "S2" "S3" "S4" "S5" 1 3 5 6 0 3 0 3 0 2 Any ihelp will be appreciated Thanks Fanie Nel