# complement.owin

0th

Percentile

##### Take Complement of a Window

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

Keywords
spatial
##### 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.

owin, owin.object
outside <- complement.owin(w)