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