A setting of dpi = 1.5 * 72 generates about the right size
graphics and alleviates the light lines problem, which must
have been from the antialiasing, as you proposed.
This seems to be related to the automatic selection of resolution
in System Preferences for Displays. The values chosen automatically
which generated the small quartz windows are set at
1280 x 1024. At one point, restarting the machine while
connected to the videoprojector, it started up with a lower
resolution and the quartz window worked fine. I wasn't
able to reproduce this though by manually reducing the
resolution in the preferences. I have to experiment
a bit more to see how to get it to start up automatically
in the lower resolution, which would seem to obviate the problem
for the short term.
Thank you for your suggestions.
Ken
Quoting Prof Brian Ripley <[EMAIL PROTECTED]>:
You can set the quartz() argument 'dpi'. I'm not sure why this is
being detected wrongly, but it looks as if it is.
On Mon, 5 May 2008, Kenneth Knoblauch wrote:
Hi,
The new graphics window defaults in R 2.7.0 are great but I've
noticed a strange phenomenon when I'm using R with my MacBook Pro
connected to a videoprojector. Under these conditions,
the quartz window that is opened is tiny,
about 1/5 the default size and the line colors are a light
grey (or a light color, at least. Not 100% sure that it is grey).
This could be the effect of antialiasing on narrow lines.
As soon as I detach the videoprojector and reset the
display size, everything returns to normal.
The minimal example would be to hook up your portable to
a videoprojector, start R and run
quartz()
Does anyone else see this?
I can get the normal default with
quartz(width = 30, height = 30)
but the text and points are very small. I can get around this
with cex and col arguments but this is not optimal. Not great
for teaching.
Thank you for any suggestions. SessionInfo below.
Ken
R version 2.7.0 Patched (2008-04-30 r45572)
i386-apple-darwin8.10.1
locale:
en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
--
Ken Knoblauch
Inserm U846
Institut Cellule Souche et Cerveau
Département Neurosciences Intégratives
18 avenue du Doyen Lépine
69500 Bron
France
tel: +33 (0)4 72 91 34 77
fax: +33 (0)4 72 91 34 61
portable: +33 (0)6 84 10 64 10
http://www.sbri.fr
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--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
--
Ken Knoblauch
Inserm U846
Institut Cellule Souche et Cerveau
Département Neurosciences Intégratives
18 avenue du Doyen Lépine
69500 Bron
France
tel: +33 (0)4 72 91 34 77
fax: +33 (0)4 72 91 34 61
portable: +33 (0)6 84 10 64 10
http://www.sbri.fr
_______________________________________________
R-SIG-Mac mailing list
[email protected]
https://stat.ethz.ch/mailman/listinfo/r-sig-mac
