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?

 

I appreciate any comments or suggestions.

 

Thanks,

 

Bernd


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