On 10/29/2007 12:06 PM, Bernd Jagla wrote:
> Hi there,
>
>
>
> I want to run an R script on a cluster with qsub. Obviously I don't want to
> display any X window, but I want use png() or something else to write out
> images.
>
> Unfortunately I get the following error message:
>
>
>
>> png(filename = " ALL.png", width = 480, height = 480, pointsize = 12, bg =
> "white", res = NA)
>
> Error in X11(paste("png::", filename, sep = ""), width, height, pointsize,
> :
>
> unable to start device PNG
>
> In addition: Warning message:
>
> unable to open connection to X11 display ''
>
> Execution halted
>
>
>
> When X11 is working everything works fine.
>
>
>
> Is there a way to make this work without X11?
>
>
>
> Or, how would I simulate an X11 environment (including the correct DISPLAY
> variable) on a cluster node?
Xvfb is the usual trick to fake an X11 environment without a display.
(It's a "virtual frame buffer" X server.) I don't know if PNG works
with it or not.
Duncan Murdoch
>
>
>
> I appreciate any comments or suggestions.
>
>
>
> Thanks,
>
>
>
> Bernd
>
>
> [[alternative HTML version deleted]]
>
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