

   BBooxxpplloott ooff VVaarriiooggrraamm CClloouudd

        spacebox(point.obj, pairs.obj, v1, v2=v1, type='r')

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

   point.obj: a point object generated by `point()'

   pairs.obj: a pairs object generated by `pairs()'

         v1: a variable to plot

         v2: an optional variable name, if entered the plot
             will be created between `v1' and `v2'

       type: either `'r'' for square-root differences or `'s''
             for squared differences

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

        Create  boxplots of square-root or squared differences
        between variable values at pairs of points versus the
        distance between the points.

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

        NULL

   RReeffeerreenncceess::

        http://www.gis.iastate.edu/SGeoStat/homepage.html

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

        `point', `pairs'

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

        spacebox(maas.pts,maas.pairs,'zinc')

