On R 2.10.1 on OS X (10.6.2) using an X11() device, plot(1:10, 1:10, main = expression(pi)) makes a not-equal symbol instead of a pi symbol.
Other Greek letters (including capital Pi) seem to work. On a quartz device the pi symbol is displayed correctly. I don't know if the issue is on the R side, but I post it here in case anyone knows where to go with it. Perry ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
