xyplot problem
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? How can I achieve what I want, i.e., that the cex argument is different
for
the different levels of grp?
Within a panel function, packet.number tells you what the levels of each
conditioning factor are. Try something like this:
#x,y,grp as above
mypanelfn <- function(...) panel.xyplot(cex=packet.number(), ...)
xyplot(y~x | grp , panel=mypanelfn)
Regards,
Richie.
Mathematical Sciences Unit
HSL
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