Hi there Does anyone know, why this is not working?: par(mfrow = c(5, 5)) for (i in 1:10){ plot(x=time, y=Var.i) } (x-variable is time y-variable is Var out of matrix with columns Var.1 Var.2 Var.3 etc...) even for (i in 1:10){ plot(x=time, y=paste("Var", i, sep=".") } does not work Thanks marc