a -nographics option to R

[Douglas Bates]

Right now the standard R.profile assigns the .First function as

 .First <- function() {
   if (interactive() && getenv("DISPLAY") != "") x11()
 }

Is it reasonable to extend that a bit and use

 .First <- function() {
   if (interactive() && getenv("DISPLAY") != "" && ! (getenv("R_NOX") != "")) x11()
 }

or something like that then put a -nographics flag into the R script
that would set R_NOX.  I am encountering the same kind of difficulty
that Peter Dalgaard mentioned when working remotely over a slow
connection.  I'm just checking that the compiled R works properly on
the other computer and I don't want to wait for it to spring up the
X11 window every time it starts.
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