function engine = enter_evidence(engine, evidence)doms = engine.fgraph.doms;ndoms = length(doms);ns = engine.fgraph.node_sizes;obs = find(~isemptycell(evidence));cobs = myintersect(obs, engine.fgraph.cnodes);dobs = myintersect(obs, engine.fgraph.dnodes);ns(cobs) = 0;ns(dobs) = 1;% recompute the weight of each domain now that we know what nodes are observedfor i=1:ndoms  engine.dom_weight(i) = prod(ns(engine.fgraph.doms{i}));end% prime each local kernel with evidence (if any)local_kernel = cell(1, ndoms);for i=1:length(engine.fgraph.kernels_of_type)  u = engine.fgraph.kernels_of_type{i};  local_kernel(u) = kernel_to_dpots(engine.fgraph.kernels{i}, evidence, engine.fgraph.domains_of_type{i});end  % initialise all msgs to 1smsg = cell(ndoms, ndoms);for i=1:ndoms  nbrs = engine.fgraph.nbrs{i};  for j=nbrs(:)'    dom = engine.fgraph.sepset{i,j};    msg{i,j} = dpot(dom, ns(dom));  endendprod_of_msg = cell(1, ndoms);bel = cell(1, ndoms);old_bel = cell(1, ndoms);converged = 0;iter = 1;while ~converged & (iter <= engine.max_iter)    % each node multiplies all its incoming msgs  for i=1:ndoms    prod_of_msg{i} = dpot(doms{i}, ns(doms{i}));    nbrs = engine.fgraph.nbrs{i};    for j=nbrs(:)'      prod_of_msg{i} = multiply_by_pot(prod_of_msg{i}, msg{j,i});    end  end    % each node computes its local belief  old_bel = bel;  for i=1:ndoms    bel{i} = normalize_pot(multiply_pots(prod_of_msg{i}, local_kernel{i}));  end  % converged?  if iter==1    converged = 0;  else    converged = 1;    for i=1:ndoms      belT = get_params(bel{i}, 'table');      old_belT = get_params(old_bel{i}, 'table');      if ~approxeq(belT, old_belT, engine.tol)	converged = 0;	break;      end    end  end  if ~converged    old_msg = msg;    % each node sends a msg to each of its neighbors    for i=1:ndoms      nbrs = engine.fgraph.nbrs{i};      for j=nbrs(:)'	% multiply all incoming msgs except from j	temp = prod_of_msg{i};	temp = divide_by_pot(temp, old_msg{j,i});	% send msg from i to j	temp = multiply_by_pot(temp, local_kernel{i});	msg{i,j} = normalize_pot(marginalize_pot(temp, engine.fgraph.sepset{i,j}));      end    end  end  iter = iter + 1endengine.marginal_domains = bel;%for i=1:ndoms    %engine.marginal_domains{i} = get_params(bel{i}, 'table');%end