On 9/23/08, Pascal A. Niklaus <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> I am trying to produce some panels with dots in an X/Y plane where the
> diameter of the dots indicates a Z value (like e.g. earthquake maps where dot
> sizes indicate magnitudes and X/Y the location).
>
> This works fine with xyplot, e.g.:
>
> xyplot(1:3~1:3,cex=1:3,pch=16)
>
> However, when I do this with a panel variable, e.g.:
>
> x<-rep(1:3,5)
> y <- rep(1:3,5)
> sz <- rep(1:5,each=3)
> grp <- factor(rep(1:5,each=3))
> xyplot(y~x | grp , cex=sz)
>
> then sz in the cex argument is not applied per group as I would expect. Same
> for other arguments like col.
>
> Is this really the intended behaviour?
Yes. Graphical arguments like 'cex' get passed to the panel function
directly, which needs to deal with it appropriately.
> How can I achieve what I want, i.e., that the cex argument is different for
> the different levels of grp?
Write your own panel function that extracts the appropriate subset of 'cex'.
xyplot(y~x | grp , cex=sz,
panel = function(x, y, cex, subscripts, ...) {
panel.xyplot(x, y, cex = cex[subscripts],
subscripts = subscripts, ...)
})
-Deepayan
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
