R-base - greek letters in plots dissapear

[Steffen Uhlig]

Binary package hint: r-base

If a graph is produced in R and used furtheron with LaTeX (sequence latex -> dvips -> ps2pdf), some greek letters just disappear. In the example below, all greek letters can be seen in the eps-file produced by R, the capital Omega is still shown in the DVI an PS-file produced by latex. However, the capital Omega is missing in the pdf (and in the print). It would be nice to have that capital Omega in the pdf and on paper (print).

System:
Description: Ubuntu 10.04 LTS
Release: 10.04
last online-update: 2010-06-15

R version 2.10.1 (2009-12-14)

<--------- snip R-example ---------->
x = 1:10
y = rnorm(x)

postscript(file="test.eps",
           paper="special",
           width=5,
           height=5,
           horizontal=FALSE,
           pointsize=10,
           family="Times"
           )

plot(x,y,
     xlab=expression(paste(mu,"--",vartheta,"--",Omega)),
     ylab=expression(paste(Chi,"--",epsilon,"--",Gamma)))

dev.off()

<--------- snip R-example ---------->

\documentclass[11pt]{article}
\usepackage{graphicx}
\begin{document}

\begin{figure}
 \includegraphics[width=5in]{./test}
\end{figure}
\end{document}

<--------- snip LaTeX-example ---------->