wolffd@0: function CPD = reset_ess(CPD)
wolffd@0: % RESET_ESS Reset the Expected Sufficient Statistics of a hhmm F node.
wolffd@0: % CPD = reset_ess(CPD)
wolffd@0: 
wolffd@0: CPD.sub_CPD_term = reset_ess(CPD.sub_CPD_term);