

   SSeett DDoommaaiinn ffoorr SSppaattiiaall PPooiinntt PPaatttteerrnn AAnnaallyysseess

        ppregion(xl=0, xu=1, yl=0, yu=1)

   AArrgguummeennttss::

         xl: Either `xl' or a list containing components `xl',
             `xu', `yl', `yu' (such as a point-process object)

         xu:

         yl:

         yu:

   DDeessccrriippttiioonn::

        Sets the rectangular domain `(xl, xu)'  x  `(yl, yu)'.

   VVaalluuee::

        none

   SSiiddee EEffffeeccttss::

        initializes variables in the `C' subroutines.

   SSeeee AAllssoo::

        `ppinit', `ppgetregion'

