[R] pdf() device uses fonts to represent points - dataalteration?

[jiho]

On 2007-October-31  , at 17:01 , Greg Snow wrote:
> Another approach is to use the my.symbols function in the  
> TeachingDemos
> package (in place of the points function) and define how you want your
> circles represented (a polygon with enough sides is a good  
> approximation
> to a circle for most cases).

Thank you for your suggestion but unfortunately this won't solve the  
problem here since I a not using the base graphics and the 'points'  
function. I am using ggplot which in turn uses Grid for the plotting  
part. In fact I never even call the point drawing function in Grid to  
do the plots, it is called when appropriate (e.g. when adding  
outliers to a boxplot). I could of course modify the source of Grid  
to plot polygons instead of points and recompile the package but the  
problem is really in the pdf part (since outputing to SVG draws real  
circles) so I would rather not tweak the rest to get the pdf right.
Thanks anyway.

JiHO
---
http://jo.irisson.free.fr/