search for: plottimexmastpar

Hi. I'm trying to get 'mu' to show up as a Greek symbol but, despite trying every example I could find, can't get it to work. Any insights would be welcome. This is what I'm using that works, but displays mu with the letter u. plotTimeXMastPAR <- qplot(DT,MastPAR, data=A, xlab = "", ylab = quote(PAR (uE ~m^-2 ~s^-1)), geom="line") + opts(legend.position="none") This is an attempt to get mu to look right but it does not work. It doesn't fail but nothing inside the expression statement gets displayed....