Hi folks, I followed an online example to input data; > x = scan(1,2,3,4,5) Error in scan(1, 2, 3, 4, 5) : either specify 'nmax' or 'n', but not both. It can't work. > x = c(1,2,3,4,5) > x [1] 1 2 3 4 5 It works. Whether "scan" is replaced with "c" ? > ?c ..... Usage: c(..., recursive=FALSE) TIA B.R. Stephen L