Dear R-users,
For the past few days, I have been trying to find the reason why some of
my plots were showing symbols of different sizes, while I thought I was
using the same .cex arguments everywhere. The problem is exemplified by
the following example code where the xyplot and grid.points functions
are used. The scaling factor is set to 0.84 in both the functions
settings, but one can see that, in the pdf file, the blue symbols
plotted by xyplot are smaller than the single black symbol created by
grid.points. Playing with the trellis settings did not seem to solve the
problem. I am missing a hidden scaling factor somewhere, but don't know
where to look anymore
I would greatly appreciate the feedback of the list on this issue.
library(lattice)
library(grid)
pdf(file="test.pdf")
df <- data.frame(a=1:12,b=1:12,c=rep(1:4,each=3))
#trellis.par.set(superpose.symbol=list(cex=1))
xyplot(b~a|c,
data=df,
panel = function(x,y){
panel.xyplot(x,y,pch=3,cex=0.84)}
)
str(trellis.par.get())
str(get.gpar())
grid.points(x=100,y=85,pch=3,gp=gpar(cex=0.84))
dev.off()
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