Desktop Survival Guide
by Graham Williams

Plotting Region

The Roption[]xpd specifies whether anything plotted outside the plotting region should be displayed (default is FALSE).

par("usr")                 # Returns coordinates of plot region. 
par(usr=c(0,600,0,800))    # Set the plot region. 
par(xpd=TRUE)		   # Do not clip to the plot region.

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