Mercurial > hg > camir-aes2014
comparison toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@bk_ff_hmm_inf_engine/private/mk_hmm_obs_lik_vec.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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-1:000000000000 | 0:e9a9cd732c1e |
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1 function obslik = mk_hmm_obs_lik_vec(bnet, evidence) | |
2 % MK_HMM_OBS_LIK_VEC Make the observation likelihood vector for one slice | |
3 % obslik = mk_obs_lik(bnet, evidence) | |
4 % | |
5 % obslik(i) = Pr(y(t) | X(t)=i) | |
6 % evidence{i,1} contains the evidence on node i in slice t-1 | |
7 % evidence{i,2} contains the evidence on node i in slice t | |
8 | |
9 ns = bnet.node_sizes; | |
10 ss = length(bnet.intra); | |
11 onodes = find(~isemptycell(evidence(:))); | |
12 hnodes = find(isemptycell(evidence(:))); | |
13 ens = ns; | |
14 ens(onodes) = 1; | |
15 Q = prod(ens(hnodes)); | |
16 obslik = zeros(1,Q); | |
17 dom = (1:ss)+ss; | |
18 bigpot = dpot(dom, ens(dom)); | |
19 onodes1 = find(~isemptycell(evidence(:,1))); | |
20 for i=onodes1(:)' | |
21 e = bnet.equiv_class(i,2); | |
22 fam = family(bnet.dag, i, 2); | |
23 pot = convert_to_pot(bnet.CPD{e}, 'd', fam, evidence); | |
24 bigpot = multiply_by_pot(bigpot, pot); | |
25 end | |
26 m = pot_to_marginal(bigpot); | |
27 obslik = m.T(:); |