broken lines with quartz device

Thanks, I'm glad this has a logical and easy explanation!

I assume the nightly build you refer to is located here: http://r.research.att.com/

, would it suffice to upgrade the R.app or is the quartz thing part  
of the heavy R dmg file?

Two days ago I tried to install R from source and it failed for some  
(obscure to me) reason, so I hope it's not required to fix this.

On 17 Jul 2008, at 15:50, Simon Urbanek wrote:

Me culpa - it's a bug in Quartz code that uses bitmap rendering  
(i.e. on-screen and bitmap formats) which splits lines to segments  
for faster rendering and produces a gap between such segments. It  
should be fixed in tonight's nightlies.

Thanks,
Simon


On Jul 17, 2008, at 4:28 AM, Peter Macdonald wrote:

Yes, I have just started to notice this in the past two weeks and  
I have no explanation.


On 2008-07-16 8:08 AM, "baptiste auguie" <ba208 at exeter.ac.uk> wrote:

Dear all,


I've just installed R on a new MacBook Pro, and I'm facing the  
following issue: continuous lines in some graphs appear with a  
discontinuity when I use the quartz or png() device. I really  
don't think it comes from this specific code as the pdf() output  
is fine, and so is the output on other machines. I have no clue  
where the problem is, I can't nail down what triggers it (I  
haven't been able yet to create a minimal example, sadly). The  
screenshot attached shows the result of the pdf() device vs the  
default quartz() device, note the broken lines in the middle of  
the right side graph.

Has anybody faced a similar glitch before?

Many thanks,

baptiste

sessionInfo()
R version 2.7.1 (2008-06-23)
i386-apple-darwin8.10.1

locale:
en_GB.UTF-8/en_GB.UTF-8/C/C/en_GB.UTF-8/en_GB.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods    
base


<image.png>

PS:  apologies for any duplicate, i've been trying to send to  
this list for 2 days without any apparent success.

-- 
Peter D.M. Macdonald, D.Phil., P.Stat.
Professor of Math & Statistics
McMaster University
Hamilton, Ontario, Canada L8S 4K1