Yes, I already had a look on previous posts but nothing is really helpful to
me.
The code is:

postscript(filename, horizontal=FALSE, onefile=FALSE, paper="special",
bg="white", family="ComputerModern", pointsize=10);
par(mar=c(5, 4, 0, 0) + 0.1);
plot(x.nor, y.nor, xlim=c(3,6), ylim=c(20,90), pch=normal.mark);

gives error
Error in plot.new() : figure margins too large

plotting on the screen without calling postscript works just fine .

Any clues? Thanks.

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