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annotate toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@bk_inf_engine/dbn_update_bel1.m @ 0:e9a9cd732c1e tip

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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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wolffd@0 1 function [engine, loglik] = dbn_update_bel1(engine, evidence)
wolffd@0 2 % DBN_UPDATE_BEL1 Update the initial belief state (bk)
wolffd@0 3 % engine = dbn_update_bel1(engine, evidence)
wolffd@0 4 %
wolffd@0 5 % evidence{i} has the evidence on node i for slice 1
wolffd@0 6
wolffd@0 7 bnet = bnet_from_engine(engine);
wolffd@0 8 ss = length(bnet.intra);
wolffd@0 9 CPDpot = cell(1,ss);
wolffd@0 10 t = 1;
wolffd@0 11 for n=1:ss
wolffd@0 12 fam = family(bnet.dag, n);
wolffd@0 13 e = bnet.equiv_class(n, 1);
wolffd@0 14 CPDpot{n} = convert_to_pot(bnet.CPD{e}, engine.pot_type, fam(:), evidence);
wolffd@0 15 end
wolffd@0 16
wolffd@0 17 onodes = find(~isemptycell(evidence));
wolffd@0 18
wolffd@0 19 [clpot, loglik] = enter_soft_evidence(engine.sub_engine1, engine.clq_ass_to_node1, CPDpot, onodes, engine.pot_type);
wolffd@0 20
wolffd@0 21 C = length(engine.clusters);
wolffd@0 22 newbel = cell(1,C);
wolffd@0 23 for c=1:C
wolffd@0 24 k = engine.clq_ass_to_cluster1(c);
wolffd@0 25 newbel{c} = marginalize_pot(clpot{k}, engine.clusters{c});
wolffd@0 26 end
wolffd@0 27
wolffd@0 28 engine.bel = newbel;
wolffd@0 29 engine.bel_clpot = clpot;
wolffd@0 30 engine.slice1 = 1;