[R] plot axises on both sides of a graph

[JeeBee]

Look at:
?axis (try the examples)

Further, a nice example I found on this mailing lists archive,
from somebody who says this has been asked many times already :)

x <- 1:10
y1 <- 1:10
y2 <- rev(seq(1,1000, length=10))
plot(x,y1,ann=FALSE)
axis(2, at=c(2,4,6,8), labels=as.character(c(2,4,6,8)))

points(x,y2/100,col="red")
axis(4, at=c(2,4,6,8), labels=as.character(c(200, 400, 600, 800))) 


On Wed, 06 Sep 2006 18:10:33 +0800, gallon li wrote:

> Usually the y-axis is shown on the left-hand-side of a graph, is it
> possible to artifically creat one more y-axis on the right-hand-side in R?
> What is the main reference? Thank you in advance.
> 
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