Hi, Check ?matplot() ?matplot(c,cbind(a,b,d),type="l",ylab="Dependent Var") #BTW, there is a typo in 'b'. (0,748). A.K. Hi, I have some values that I need to represente in the same plot. For exemple, if I have, c<-c(200,205,210,215,220,225,230,235) a<-c(0.032,0.44,0.86,0.65,0.53,0.213,0.46,0.231) b<-c(0.325,0.657,0.784,0.236,0.798,0.287,0,748,0.785) d<-c(0.786,0.217,0.538,0.513,0.870,0.326,0.647,0.217) c is a independente variable (represented in x axis) and a, b, d are diferente dependente varible (represented in a y axes). a, b and d should be diferent lines, How can I do that? Thank you