[R] monitor linearity

[gordon.harrington@uni.edu]

demo("graphics") notes that a circle (piechart) is a test of monitor linearity.
With a new monitor on a new linux system with R-0.65.0 I get an ellipse. This
is not a pincushion effect and the major/minor axis ratio is constant over size
and screen location variation. Is this a hardware problem or are there
alternative possible explanations to explore?



Gordon M. Harrington		Mail:	3720 Village Place, #6308
Professor Emeritus			Waterloo, IA 50702-5848
University of Northern Iowa 	Phone:	319-291-8535
gordon.harrington at uni.edu	Fax:	319-291-8491
dryfly at aya.yale.edu			319-291-8324

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