R pch plotting in illustator as “q”

Question

Every time I use pch=21 for plotting in R with lattice, my plot plots normally in the R plotting window and in pdf (circles with borders); however when I open a saved pdf versio

Answer 1

I think you might want to use:

 useDingbats = FALSE 

as in:

pdf("myplot.pdf", useDingbats=FALSE)
plot()
dev.off()