Hello, How to use the function plot to produce graphs as Matlab? example in Matlab: a = [1,2,5,3,6,8,1,7]; b = [1,7,2,9,2,3,4,5]; plot(a,'b') hold plot(b,'r') How to make the same in R-package ? I am trying something thus: a <- c(1,2,5,3,6,8,1,7) c(1,7,2,9,2,3,4,5) -> b a;b plot(a,t="l",col="blue") plot(b,t="l",col="red")