[R] plot area: secondary y-axis does not display well

[Ivan Calandra]

Hi Muhammad,

The problem is that you set the par() options before creating your png.
I've tried, and it works if you do this:
... # x and y
png("image.png")
par(mar=c(5,5,5,7)+0.1) # inner margin
par(oma=c(3,3,3,7))    # outer margin
... # rest of your code

HTH,
Ivan

Le 4/2/2010 12:12, Muhammad Rahiz a écrit :
> Dear useRs,
>
> I'm having a slight problem with plotting on 2 axes. While the 
> following code works alright on screen, the saved output does not turn 
> out as desired i.e. the secondary y-axis does not display fully.
>
> Just run the code and look at image output. Suggestions please...
>
> thanks,
>
> Muhammad
>
> ---
> rm(list=ls())
> x <- 1:100
> y <- 200:300
>
> par(mar=c(5,5,5,7)+0.1) # inner margin
> par(oma=c(3,3,3,7))    # outer margin
> png("image.png")
> plot(x,cex=0.5,type="l",lty=2,pch=3,xlab="year",ylab="x-axis",las=1,col="blue") 
>
> par(new=TRUE)
> plot(y,cex=0.5,type="l",lty=2,pch=3,xlab="",ylab="",las=1,axes=FALSE,ylim=c(0,500),col="red") 
>
> axis(4,las=1)
> mtext("y-axis",side=4,line=3)
> legend("topleft",col=c("blue","red"),lty=2,legend=c("x","y"),bty="n")
> box("figure",col="red")
> box("plot",col="blue")
> dev.off()
>
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>

-- 
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calandra at uni-hamburg.de

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