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58569
2012 Sep 27
1
erasing a polygon
I'm updating some (very) old code, and one particular option of its plot method depends on
a once-was-true trick
polygon(x, y, border=TRUE, col=0)
polygon(x, y, border=TRUE, density=0)
would draw the polygon AND erase whatever was underneath it back to background color.
Is there a reliable way to do this with the current R (standard graphics)?
Terry Therneau
PS For the