[R] Trouble with R and cronjobs
xyzzy at speakeasy.org
Wed Apr 3 05:54:25 CEST 2002
On Wed, 3 Apr 2002 j_turner at ihug.co.nz wrote:
> > Can someone tell me how to fix this?
> 1) have X running all the time (yuck).
> 2) install ghostscript (if you don't have it already), and use
> bitmap(file="foo.png", type="png256",res=300)
> If it *must* be png format, I'd pick 2. For quality plots over web services,
> you really can't beat the pdf() driver, though. Yum.
3) run the virtual X server, Xvfb, which simulates an X server but doesn't
actually drive any hardware.
Note that the plots will look different when you use the png vs bitmap device,
Xvfb has advantages even if you have an X server, if you are working remotely.
R has to send the graphics commands over the network to the X server, then
download the finished graph. One user here generated a batch of png plots
from a remote PC with an X server and ssh X forwarding. It look about 6
hours. I told him how to setup Xvfb to run on the same machine as R, and the
same process took about 1 minute.
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch
More information about the R-help