How to add expressions or greek letters with annotation?

[Herbert Jägle]

Hi,

i tried to add some text to a plot using annotate. Unfortunately i did
not find how to add any text including expression or greek letters.

Using

txt <- expression(mu * 'V')
annotate("text", x=0.12, y=0.12, label=txt, size=2)

just adds the text "mu * "V"".

Thanks,
Herbert

[baptiste auguie]

Hi,

geom_text has a parse argument for this,

qplot(1,1,geom="blank") +
annotate("text", x=1,y=1,label="alpha", parse=TRUE)

HTH,

baptiste

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