?plotmath Try instead: > pdf("mu.pdf") > plot(1,1, type="n") > text(1,1, "\u3BC") > dev.off() On Mar 20, 2010, at 2:16 PM, Dennis Fisher wrote: >> pdf("mu.pdf") >> plot(1,1, type="n") >> text(1,1, "\u3BC") >> dev.off() David Winsemius, MD West Hartford, CT