Hello there,
Straight to the point: it seems that CairoPDF from package "Cairo"
cannot handle greek letters from expression(). For example,
> eta = seq(from=-pi, to=pi, length=100)
> f = sin(eta)^2
> pdf(file = "temp_pdf.pdf")
> plot(eta, f, type="l", main=expression(f(eta)==sin(eta)^2),
> xlab=expression(eta), ylab=expression(f(eta)))
> dev.off()
gives the expected result, but
> require("Cairo")
> CairoPDF(file = "temp_CairoPDF.pdf")
> plot(eta, f, type="l", main=expression(f(eta)==sin(eta)^2),
> xlab=expression(eta), ylab=expression(f(eta)))
> dev.off()
leaves a blank where it should display the etas. Any ideas here?
(session info below)
Thanks in advance and best regards,
Eduardo
----
> sessionInfo()
R version 2.11.1 (2010-05-31)
i386-pc-mingw32
locale:
[1] LC_COLLATE=Portuguese_Brazil.1252 LC_CTYPE=Portuguese_Brazil.1252
[3] LC_MONETARY=Portuguese_Brazil.1252 LC_NUMERIC=C
[5] LC_TIME=Portuguese_Brazil.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] Cairo_1.4-5
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