Mercurial > hg > camir-aes2014
diff toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@pearl_dbn_inf_engine/private/init_pearl_dbn_ev_msgs.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
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date | Tue, 10 Feb 2015 15:05:51 +0000 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@pearl_dbn_inf_engine/private/init_pearl_dbn_ev_msgs.m Tue Feb 10 15:05:51 2015 +0000 @@ -0,0 +1,28 @@ +function msg = init_pearl_dbn_ev_msgs(bnet, evidence, engine) + +[ss T] = size(evidence); +pot_type = 'd'; + +% each hidden node absorbs lambda from its observed child (if any) +for t=1:T + for i=hnodes + c = engine.obschild(i); + if c > 0 + if t==1 + fam = family(bnet.dag, c); + e = bnet.equiv_class(c, 1); + CPDpot = CPD_to_pot(pot_type, bnet.CPD{e}, fam, bnet.node_sizes(:), bnet.cnodes(:), evidence(:,1)); + else + fam = family(bnet.dag, c, 2); % within 2 slice network + e = bnet.equiv_class(c, 2); + CPDpot = CPD_to_pot(pot_type, bnet.CPD{e}, fam, bnet.node_sizes(:), bnet.cnodes(:), evidence(:,t-1:t)); + end + temp = pot_to_marginal(CPDpot); + n = i + (t-1)*ss; + lam_msg = normalise(temp.T); + j = engine.child_index{n}(c+(t-1)*ss); + assert(j==1); + msg{n}.lambda_from_child{j} = lam_msg; + end + end +end