Euro Symbol €
is shown as ...
at PDF output
ggplot() + theme_bw() + geom_line() + scale_y_continuous(formatter = "euro")
Use ISOLatin9.enc
encoding when starting PDF graphics
pdf(encoding = "ISOLatin9.enc")
At http://stat.ethz.ch/R-manual/R-patched/library/graphics/html/text.html is said that euro symbol can selecting ISO-8895-15 (Latin-9) which has the Euro as character