Thanks a lot for the clarifications and helpful information, Prof.
Ripley.
A related question along the line: The reason I wanted to have quartz
instead of X11 was that quartz() automatically provides antialiasing
effect when drawing lines when using dev.new(). I just noticed that
on http://developer.r-project.org/blosxom.cgi/R-devel it says "dev.new
() gains a '...' argument which can be used to passed named arguments
which will be used if appropriate to the device selected". So does it
mean I can expect that I could specify an option such as "antialias"
in dev.new() in version 2.8.0 so that I would have antialiasing
effect in case X11() is invoked?
Thanks again,
Gang
On Oct 15, 2008, at 5:54 PM, Prof Brian Ripley wrote:
On Wed, 15 Oct 2008, Gang Chen wrote:
When invoking dev.new() on my Mac OS X 10.4.11, I get an X11 window
instead of quartz which I feel more desirable. So I'd like to set
the default device to quartz. However I'm confused because of the
following:
> Sys.getenv("R_DEFAULT_DEVICE")
R_DEFAULT_DEVICE
"quartz"
> getOption("device")
[1] "X11"
What's going on?
I don't know (it is your machine), but here's my guess ....
I dom't see R_DEFAULT_DEVICE set on my Mac, but note that
R_INTERACTIVE_DEVICE takes precedence in interactive use. So
something in your setup is different from mine, maybe some startup
files or R.app preferences? The first diagnostic step is to see if
R_INTERACTIVE_DEVICE is set and why R_DEFAULT_DEVICE is set (and
see below for why the current setting is dangerous).
Also is file Renviron under /Library/Frameworks/R.framework/
Resources/
etc/ppc/ the one I should modify if I want to change some environment
variables? But I don't see R_DEFAULT_DEVICE there.
As to where you should set it, it depends on who you want to set it
for, and how you run R (from R.app or from the command line). But
Renviron is not the right place: a file Renviron.site in that
directory would be if you want a system-wide setting (see ?
Startup). But do be careful, as if you make quartz the default for
remote interactive or batch sessions you are likely to get
undesirable behaviour (possibly even crashes for some R versions).
In short, don't set R_DEFAULT_DEVICE to an screen device.
TIA,
Gang
--
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
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