Daniel@0: function b = backT(engine, f, t)
Daniel@0: 
Daniel@0: if t==1
Daniel@0:   [b.clpot, seppot] = distribute_evidence(engine.jtree_engine1, f.clpot, f.seppot);
Daniel@0: else
Daniel@0:   [b.clpot, seppot] = distribute_evidence(engine.jtree_engine, f.clpot, f.seppot);
Daniel@0: end
Daniel@0: for c=1:length(b.clpot)
Daniel@0:   [b.clpot{c}, ll(c)] = normalize_pot(b.clpot{c});
Daniel@0: end
Daniel@0: b.t = t;