Mercurial > hg > camir-aes2014
annotate 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 |
---|---|
date | Tue, 10 Feb 2015 15:05:51 +0000 |
parents | |
children |
rev | line source |
---|---|
wolffd@0 | 1 function obslik = mk_hmm_obs_lik_vec(bnet, evidence) |
wolffd@0 | 2 % MK_HMM_OBS_LIK_VEC Make the observation likelihood vector for one slice |
wolffd@0 | 3 % obslik = mk_obs_lik(bnet, evidence) |
wolffd@0 | 4 % |
wolffd@0 | 5 % obslik(i) = Pr(y(t) | X(t)=i) |
wolffd@0 | 6 % evidence{i,1} contains the evidence on node i in slice t-1 |
wolffd@0 | 7 % evidence{i,2} contains the evidence on node i in slice t |
wolffd@0 | 8 |
wolffd@0 | 9 ns = bnet.node_sizes; |
wolffd@0 | 10 ss = length(bnet.intra); |
wolffd@0 | 11 onodes = find(~isemptycell(evidence(:))); |
wolffd@0 | 12 hnodes = find(isemptycell(evidence(:))); |
wolffd@0 | 13 ens = ns; |
wolffd@0 | 14 ens(onodes) = 1; |
wolffd@0 | 15 Q = prod(ens(hnodes)); |
wolffd@0 | 16 obslik = zeros(1,Q); |
wolffd@0 | 17 dom = (1:ss)+ss; |
wolffd@0 | 18 bigpot = dpot(dom, ens(dom)); |
wolffd@0 | 19 onodes1 = find(~isemptycell(evidence(:,1))); |
wolffd@0 | 20 for i=onodes1(:)' |
wolffd@0 | 21 e = bnet.equiv_class(i,2); |
wolffd@0 | 22 fam = family(bnet.dag, i, 2); |
wolffd@0 | 23 pot = convert_to_pot(bnet.CPD{e}, 'd', fam, evidence); |
wolffd@0 | 24 bigpot = multiply_by_pot(bigpot, pot); |
wolffd@0 | 25 end |
wolffd@0 | 26 m = pot_to_marginal(bigpot); |
wolffd@0 | 27 obslik = m.T(:); |