Dear list,

I'm manually editing a large collection of pdf files that I produced with R
in Adobe Illustrator. In doing so, I've had the surprise to see symbols
duplicated on top each other. The following code illustrates this,

pdf()
plot(1, xlab=expression(mu))
dev.off()

If I open this pdf in Illustrator CS4, there are two "mu" on top of each
other, giving it a somewhat bold aspect. Other characters not from the
symbol font are just output in one version. I'm guessing this may be very
much dependent on my config, which is,

sessionInfo()
R version 2.9.0 (2009-04-17)
i386-apple-darwin9.6.0

locale:
en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8

attached base packages:
[1] grid      stats     graphics  grDevices utils     datasets  methods
[8] base

Thanks for any advice, (and apologies if there was an obvious source of
information that I failed to check).

baptiste

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