[R] device png() in batch mode?

[Mai Zhou]

Dear helper, I am using linux (redhat) R 1.5.0, in the 
batch mode. 

The device png() do not seem to be available.

A look at the help says png() is available if I
use --gui option.

Is there a way to get around it? 
(to get png("Rplot.png") in batch mode?)

The reason I need batch mode is that I am working to get the Rcgi
to run.

Thanks,

Mai Zhou
mai at ms.uky.edu
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