[R] Reducing the size of pdf graphics files produced with R

Chabot Denis chabotd at globetrotter.net
Tue May 22 19:28:22 CEST 2007

Thank you Sundar,

Do plots being so reduced remain object based (i.e. not bitmaps)?

Le 07-05-22 à 13:19, Sundar Dorai-Raj a écrit :

> You need not buy Acrobat. There are two free software programs that  
> will compress pdf files:
> http://www.cutepdf.com
> http://www.cs.wisc.edu/~ghost/ (and in particular GSView)
> They both allow several levels of compression.
> Thanks,
> --sundar
> Chabot Denis said the following on 5/22/2007 3:32 AM:
>> Hi,
>> Without trying to print 1000000 points (see <http://  
>> finzi.psych.upenn.edu/R/Rhelp02a/archive/42105.html>), I often  
>> print  maps for which I do not want to loose too much of coastline  
>> detail,  and/or plots with 1000-5000 points (yes, some are on top  
>> of each  other, but using transparency (i.e. rgb colors with  
>> alpha  information) this actually comes through as useful  
>> information.
>> But the files are large (not as large as in the thread above of   
>> course, 800 KB to about 2 MB), especially when included in a  
>> LaTeX  document by the dozen.
>> Acrobat (not the reader, the full program) has an option "reduce  
>> file  size". I don't know what it does, but it shrinks most of my  
>> plots to  about 30% or original size, and I cannot detect any loss  
>> of detail  even when zooming several times. But it is a pain to do  
>> this with  Acrobat when you generate many plots... And you need to  
>> buy Acrobat.
>> Is this something the pdf device could do in a future version? I   
>> tried the "million points" example from the thread above and the  
>> 55  MB file was reduced to 6.9 MB, an even better shrinking I see  
>> on my  usual plots.
>> Denis Chabot
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>> and provide commented, minimal, self-contained, reproducible code.

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