When I create a dotplot in lattice, I frequently observe overplotting
of the labels along the vertical axis. On my screen, this illustrates
overplotting of the letters:
windows()
reps=6
dat=data.frame(let=rep(letters,each=reps), grp=rep(1:reps, 26),
y=runif(26*reps))
dotplot(let~y|grp, dat)
Is there a way to automatically scale the labels so that they are not
over-plotted?
I currently do something like this:
Calculate or guess the number of panel rows: NumPanelRows
cexLab <- min(1, .9*par()$pin[2]/
(nlevels(dat$let)*NumPanelRows*strheight("A",units="in")))
dotplot(..., scales=list(y=list(cex=cexLab))
Is there an easier way?
Is there a function that I can call which calculates the layout of the
panels that will be used in the dotplot?
Any tips will be appreciated.
K Wright
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