Mercurial > hg > camir-aes2014
view 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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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