There are several methods to perform this task I am sharing a few with you:
Method-1:
Use par, it will plot on the same graph but axis will be different. E.x.
plot( x, y1, type="l", col="blue" )
par(new=TRUE)
plot( x, y2, type="l", col="yellow" )
Method-2:
You can add lines() or points() to the existing graph but it won’t create a new window.
plot(x,y1,type="l",col="blue")
lines(x,y2,col="yellow")
Method-3:
Use matplot function, e.x.
matplot(x, cbind(y1,y2),type="l",col=c("blue","yellow"),lty=c(1,1))
There are some other methods too, I hope one of this help you with your issue.
