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Retrieves the rectangular domain (xl, xu) \(\times\) (yl, yu) from the underlying C code.
(xl, xu)
(yl, yu)
C
ppgetregion()
A vector of length four with names c("xl", "xu", "yl", "yu").
c("xl", "xu", "yl", "yu")
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.
ppregion