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...cation, I need mixed Greek and non-Greek characters in the labels. Of course, that's easy enough if I can get expression() working for me. Thanks in advance for any suggestions. Best, Dave -- View this message in context: http://www.nabble.com/Expressions-in-factor-labels-on-postscript-plots-tp14607806p14607806.html Sent from the R help mailing list archive at Nabble.com.