rshift(X, ...)"ppp"),
    a line segment pattern (class "psp")
    or an object of class "splitppp".X.  The argument X may be 
  
"ppp")"psp")"splitppp"(basically a list of point patterns, obtained fromsplit.ppp).rshift is generic, with
  methods for the three classes "ppp",
  "psp" and "splitppp".  See the help pages for these methods, rshift.ppp,
  rshift.psp and
  rshift.splitppp, for further information.
rshift.ppp,
  rshift.psp,
  rshift.splitppp