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some_very_large_number
2013 Jan 20
2
"user units" in plotrix
...) device units (e.g. inches with PDFs)
or (b) user coordinates along any particular axis.
as an example, suppose i set up a PDF device with inches, the device
has both outer and inner magins, and the plot region has drastically
different x and y coordinate ranges (e.g. xlim = c(0, 1), ylim = c(0,
SOME_VERY_LARGE_NUMBER)).
now i'd like to draw.circle(...) but i can't figure out what units the
radius argument takes.
"user units" doesn't appear to be inches in this case, and it it
corresponds to user coordinates, i don't know which axis' scaling is
to be used as the reference.
ideal...