Your code is not reproducible, we do not have rfc, y, zVals nor
NoCols.
It's much easier to reproduce: just type in the first example from
the "image" help page
x <- y <- seq(-4*pi, 4*pi, len=27)
r <- sqrt(outer(x^2, y^2, "+"))
image(z = z <- cos(r^2)*exp(-r/6), col=gray((0:32)/32))
then save from the quartz() display
Well, not possible for me on Windows .....
Anyway, please use the pdf() device directly and see if it works:
Works just as well as dev.copy2pdf() ... it really appears to be a bug
in the Quartz framework.
Unfortunately, I don't know why the OP doesn't just use the pdf()
device.
(I used the menu) and view with Adobe Reader 9 (I seem to have
9.0.0).
You should upgrade (even just for security reasons and many
bugfixes), 9.1.3 is recent on Windows.
The newest I could get from Adobe is 9.1.0. Strangely enough, even
though I have configured it to check for updates on startup, Adobe
Reader never suggested to me that an update may be available.
Thanks for mentioning this.
Cheers,
Stefan
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