function [clpot, seppot] = collect_evidence(engine, clpot, seppot)% COLLECT_EVIDENCE Do message passing from leaves to root (children then parents)% [clpot, seppot] = collect_evidence(engine, clpot, seppot)for n=engine.postorder %postorder(1:end-1)  for p=engine.postorder_parents{n}    %clpot{p} = divide_by_pot(clpot{n}, seppot{p,n}); % dividing by 1 is redundant    seppot{p,n} = marginalize_pot(clpot{n}, engine.separator{p,n}, engine.maximize);    clpot{p} = multiply_by_pot(clpot{p}, seppot{p,n});  endend