Dear Professor Ripley, Thank you for your reply. Do you specify \u21A6 via something like this?
plot(1, main=expression(symbol("\u21A6"))) This gives an the 'registered trademark symbol' (circled R) for me (also cairo-based Linux). Thanks and cheers, Marius ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.