[R] Graph format: quality vs. file size

[Berton Gunter]

Given that you are doing a Q-Q plot, I strongly suspect that other then in
the extreme tails, there will be no loss of visible information if you plot
only 1 out of every 10 of the ordered values instead of all of them (as the
ordered values are highly correlated). This makes the file size manageable.
If you are interested in the extreme tails (the highest and lowest 50 or so
points), these probably should be examined separately. I would guess that
they are not part of the rest of the distribution, anyway (whatever that
means).

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
 
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box
 
 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Jindan Zhou
> Sent: Thursday, January 13, 2005 3:11 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Graph format: quality vs. file size
> 
> Hello R-List,
> 
> The question is related to R, but not strictly:
> 
> I have generated a Q-Q plot with some 15,000 data points, 
> when saved in
> postscript format, the file became really large, which is not 
> good to be
> included in a LaTex file, as the output pdf file will be too 
> big in file
> size, too. If I save the graph in jpeg format, the quality is simply
> unacceptable.
> 
> Do you have a workaround for this problem? What is the best 
> graph format
> in R that preserves the quality while minimizes the file size?
> 
> Thanks for input!
> 
> Jindan
> 
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