Applies a vector shift of the plane to a geometrical object, such as a point pattern or a window.
shift(X, ...)Another object of the same type, representing the result of applying the shift.
Any suitable dataset representing a two-dimensional
    object, such as a point pattern (object of class "ppp"),
    or a window (object of class "owin").
Arguments determining the shift vector.
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
and Rolf Turner rolfturner@posteo.net
This is generic. Methods are provided for
  point patterns (shift.ppp)
  and windows (shift.owin).
The object is translated by the vector vec.
shift.ppp,
  shift.owin,
  rotate,
  affine,
  periodify