[R-SIG-Mac] saving graphs; jpeg(), bitmap()

[Byron Ellis]

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).
> stefano
>

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.



>
>> Cheers,
>> Simon
>>
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---
Byron Ellis (ellis at stat.harvard.edu)
"Oook" -- The Librarian