[R-SIG-Mac] saving graphs; jpeg(), bitmap()
ellis at stat.harvard.edu
Thu Dec 9 01:42:28 CET 2004
On Dec 8, 2004, at 4:05 PM, stefano iacus wrote:
>> PDF is actually a very good format supporting both bitmap (cf
>> PhotoShop) and vector graphics (cf Illustrator) - it's even better
>> than old PostScript, because it supports transparency and other cool
>> things. Mac OS X actually uses PDF as its main display format. In
>> fact PS used to be the standard for publishing and nowadays PDF is
>> replacing that role. As a Mac user you're in the fortunate position
>> of having many good PDF tools at your fingertips (in contrast to the
>> Win folks :P).
> well, let me say that the PDF file saved via R menus on mac, makes a
> copy of the current graphic device (quartz) on the R pdf() device.
> It's order of magnitude smaller that what you get by using quartz (but
> don't ask me why, I simply don't have to check at the moment).
There's not much we can do about the Quartz file sizes---Quartz doesn't
do much compression and includes a lot of redundant
information---either for safety reasons or size/speed tradeoff. There
are a couple of post-processing tools that can shrink Quartz PDFs, but
who knows. Rumor has it that Tiger's PDFKit may help with that.
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Byron Ellis (ellis at stat.harvard.edu)
"Oook" -- The Librarian
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