Mercurial > hg > camir-aes2014
annotate toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@bk_ff_hmm_inf_engine/dbn_update_bel.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
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date | Tue, 10 Feb 2015 15:05:51 +0000 |
parents | |
children |
rev | line source |
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wolffd@0 | 1 function [engine, loglik] = dbn_update_bel(engine, evidence) |
wolffd@0 | 2 % DBN_UPDATE_BEL Update the belief state (bk_ff_hmm) |
wolffd@0 | 3 % [engine, loglik] = dbn_update_bel(engine, evidence) |
wolffd@0 | 4 % |
wolffd@0 | 5 % evidence{i,1} contains the evidence on node i in slice t-1 |
wolffd@0 | 6 % evidence{i,2} contains the evidence on node i in slice t |
wolffd@0 | 7 |
wolffd@0 | 8 oldbel = engine.bel; |
wolffd@0 | 9 bnet = bnet_from_engine(engine); |
wolffd@0 | 10 obslik = mk_hmm_obs_lik_vec(bnet, evidence); |
wolffd@0 | 11 [newbel, lik] = normalise((engine.transmat' * oldbel) .* obslik); |
wolffd@0 | 12 loglik = log(lik); |
wolffd@0 | 13 |
wolffd@0 | 14 hnodes = engine.hnodes; |
wolffd@0 | 15 ns = bnet.node_sizes; |
wolffd@0 | 16 [marginals, marginalsT] = project_joint_onto_marginals(newbel, hnodes, ns); |
wolffd@0 | 17 newbel = combine_marginals_into_joint(marginalsT, hnodes, ns); |
wolffd@0 | 18 engine.bel_marginals = marginalsT; |
wolffd@0 | 19 engine.bel = newbel; |