wolffd@0: Decision/regression tree CPD
wolffd@0: Author: Yimin Zhang yimin.zhang@intel.com
wolffd@0: 21 Jan 2002
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wolffd@0: See also Paul Bradley's Multisurface Method-Tree matlab code
wolffd@0:  http://www.cs.wisc.edu/~paulb/msmt/
wolffd@0: http://www.cs.wisc.edu/~olvi/uwmp/msmt.html