[R] plot y1 and y2 on one graph

From: milton ruser <milton.ruser_at_gmail.com>
Date: Wed, 27 Feb 2008 19:05:52 -0300


Dear all

I have a code like

x<-1:10
y1<-x+runif(10)*2
y2<-seq(0,50,length.out=10)+rnorm(10)*10

par(mfrow=c(1,2))
plot(y1~x)
plot(y2~x)

Now I would like to plot y1 and y2 on the same graph, with its two scales (y1 on left and y2 on rigth side).

Any help are welcome.

Kind regards

Miltinho

Brazil

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