wolffd@0: function CPD = reset_ess(CPD)
wolffd@0: % RESET_ESS Reset the Expected Sufficient Statistics of a hhmm Q node.
wolffd@0: % CPD = reset_ess(CPD)
wolffd@0: 
wolffd@0: if ~isempty(CPD.sub_CPD_start)
wolffd@0:   CPD.sub_CPD_start = reset_ess(CPD.sub_CPD_start);
wolffd@0: end
wolffd@0: CPD.sub_CPD_trans = reset_ess(CPD.sub_CPD_trans);