Plotting Euro Symbol € in ggplot2?

Question

Euro Symbol € is shown as ... at PDF output

ggplot() + theme_bw() + geom_line() + scale_y_continuous(formatter = \"euro\")
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Answer 1

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