I lose control on colors when I plot points with pch=1 or 16 (empty or solid circle) or any letter, say "A". For example:  x=runif(5) y=runif(5) pdf("plot.pdf") plot(x, y, type='p', pch=1, col = 1:5) #just black points plot(x, y, type='p', pch=0, col = 1:5) #points with different colors dev.off()  This problem occurred for different versions of R under Mac OS X 10.4. not sure whether this is true for other operating systems. I used my most basic settings of R without any special package loaded. Any suggestions/ideas would be appreciated.  > sessionInfo() R version 2.8.0 (2008-10-20) powerpc-apple-darwin8.11.1  locale: C  attached base packages: [1] stats    graphics grDevices utils    datasets methods  base     [[alternative HTML version deleted]]
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