[R] Plotting: Plot several axis at right hand side of the plot

[Uwe Ligges]

Jan Verbesselt wrote:
> Hi all,
> 
> I created a graph by plotting 4 time series on top of each other but don't
> know how to add extra axes on the right hand side of the plot (or leftside).
> For the first two time series it axis are plotted but the last two time
> series don't have and axis. How can these be added and where?
> 
> e.g.
> par(mfrow=c(1,1))
>     plot(timeserie1)
>     par(new=T)
>     plot(timeserie2, type="b", col=3,yaxt="n", ylab="" )
>     axis(4)
>     mtext(side=4, line=2, "NDVI")
>     par(new=T)
>     plot(timeserie3, type="h", col=2,yaxt="n", ylab="")
>     par(new=T)
>     plot(timeserie4, type="b", col=4,yaxt="n", ylab="")


I'm confused! You want 4 different y axis for one plot? Well, the first 
question is where want you the third and fourth y-axis be added?

Isn't it a better idea - given all timeseries have a reasonable range of 
y-values - to plot them using the same y axis?

Uwe Ligges


> Thanks,
> Jan
> 
> 
> _______________________________________________________________________
> ir. Jan Verbesselt 
> Research Associate 
> Lab of Geomatics and Forest Engineering K.U. Leuven
> Vital Decosterstraat 102. B-3000 Leuven Belgium 
> Tel:+32-16-329750   Fax: +32-16-329760
> http://gloveg.kuleuven.ac.be/
> 
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