But doesn't it suffice to replace png() by bitmap()?
b
On Oct 29, 2007, at 12:47 PM, Duncan Murdoch wrote:
> 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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>> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help@r-project.org mailing list
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