[R] Artifacts in pdf() of image() (w/o comments)

[Ken Knoblauch]

Hi Duncan, Hi Michael,

Duncan Murdoch <murdoch <at> stats.uwo.ca> writes:

> On 8/13/2007 1:33 PM, Michael Kubovy wrote:
> 
>   - You saw ugly artifacts in a graph you produced.  That's a bug.  The 
> question is, what caused it?
>   - You rightly asked on R-help.  It might have been a bug in the way 
> you were doing things, or a bug in R, or a bug in the way you were 
> viewing the image.
>   - It was demonstrated that this only appears in Preview, not in 
> Acrobat Reader, so it's probably a bug there.
> 
> It's only at the last point that I object to what you did:  your 
> question quoted below makes it look as though you think Apple's time is 
> more valuable than ours.  I remind you that you paid for Preview, and 
> you didn't pay for R.  Apple has a stronger obligation to help you than 
> any of us do.  My experience with them (and with most other commercial 
> software vendors) is that you'll get much worse help from them than from 
> us --- but that doesn't mean you shouldn't try.  Perhaps when anyone 
> searching for "Mac OSX Preview" on Google shows up a page full of 
> unhandled bug reports they'll actually do something.
> 
> Duncan Murdoch
> 
> > 
> > On Aug 13, 2007, at 9:56 AM, Duncan Murdoch wrote:
> > 
> >> On 8/13/2007 11:43 AM, Michael Kubovy wrote:
> >>> But is it a bug? Can a program anti-alias text and line drawings  
> >>> and  not bitmaps?
> ... [deletions] ...
> >>>> An alternative to dropping Preview is to report the bug in it to   
> >>>> Apple.  Apple has an online bug reporting web page somewhere; I   
> >>>> haven't found them as helpful as R-help, but your mileage may vary.
> >>>>
> >>>> Duncan Murdoch

I'm entering this late.  I just wanted to point out that there are earlier 
threads on this issue on the R-Sig-Mac list that might be useful 
to follow through.

https://stat.ethz.ch/pipermail/r-sig-mac/2005-March/001650.html

https://stat.ethz.ch/pipermail/r-sig-mac/2006-February/002678.html

Simon Urbanek suggested one patch on the later thread.  My solution, 
at the time, was to capture the image from the acrobat rendition.  

best,

ken

-- 
Ken Knoblauch
Inserm U846
Institut Cellule Souche et Cerveau
Département Neurosciences Intégratives
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