

   CClluusstteerriinngg ttrreeeess -- GGeenneerriicc ffuunnccttiioonn

        pltree(x, ...)

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

          x: an S-PLUS object.

        ...: methods may have additional arguments.  Graphical
             parameters (see `par') may also be supplied as
             arguments to this function.

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

        a clustering tree is created on the current graphics
        device.

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

        `agnes', `diana', `par'.

   EExxaammpplleess::

        pltree(agnes(votes.repub))

        pltree(diana(votes.repub))

