complement.owin

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Take Complement of a Window

Take the set complement of a window, within its enclosing rectangle.

Keywords
spatial, math
Usage
complement.owin(w)
Arguments
w
an object of class "owin" describing a window of observation for a point pattern.
Details

If w is a rectangular window this produces an error. Otherwise, it yields a window object (of class "owin", see owin.object) representing the set complement of w inside its enclosing rectangle. For polygonal windows this is achieved by reversing the sign of each boundary polygon, while for binary masks it is achieved by negating the pixel values.

Value

  • Another object of class "owin" representing the complement of the window, i.e. the inside of the window becomes the outside.

See Also

owin, owin.object

Aliases
  • complement.owin
Examples
# polygonal
   data(demopat)
   w <- demopat$window
   outside <- complement.owin(w)
   # mask
   w <- as.mask(demopat$window)
   outside <- complement.owin(w)
Documentation reproduced from package spatstat, version 1.9-2, License: GPL version 2 or newer

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