Mercurial > hg > camir-aes2014
view toolboxes/FullBNT-1.0.7/bnt/examples/dynamic/HHMM/abcd_hhmm.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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% Make the HHMM in Figure 1 of the NIPS'01 paper Qsize = [2 3 2]; Qnodes = 1:3; D = 3; transprob = cell(1,D); termprob = cell(1,D); startprob = cell(1,D); clear A; % transprob{d}(i,k,j), transprob{1}(i,j) % termprob{d}(k,j), termprob{1}(1,j) % startprob{d}(k,j), startprob{1}(1,j) % LEVEL 1 % 1 2 e A{1} = [0 0 1; 0 0 1]; [transprob{1}, termprob{1}] = remove_hhmm_end_state(A{1}); startprob{1} = [0.5 0.5]; % LEVEL 2 A{2} = zeros(Qsize(2), Qsize(1), Qsize(2)+1); % 1 2 3 e A{2}(:,1,:) = [0 1 0 0 % Q1=1 => model below state 0 0 0 1 0 0 0 0 1]; % 1 2 3 e A{2}(:,2,:) = [0 1 0 0 % Q1=2 => model below state 1 0 0 1 0 0 0 0 1]; [transprob{2}, termprob{2}] = remove_hhmm_end_state(A{2}); % always enter level 2 in state 1 startprob{2} = [1 0 0 1 0 0]; % LEVEL 3 A{3} = zeros([Qsize(3) Qsize(2) Qsize(3)+1]); endstate = Qsize(3)+1; % Qt-1(3) Qt(2) Qt(3) % 1 2 e A{3}(1, 1, endstate) = 1.0; % Q2=1 => model below state 2/5 A{3}(:, 2, :) = [0.0 1.0 0.0 % Q2=2 => model below state 3/6 0.5 0.0 0.5]; A{3}(1, 3, endstate) = 1.0; % Q2=3 => model below state 4/7 [transprob{3}, termprob{3}] = remove_hhmm_end_state(A{3}); startprob{3} = 'leftstart'; % OBS LEVEl chars = ['a', 'b', 'c', 'd', 'x', 'y']; Osize = length(chars); obsprob = zeros([Qsize Osize]); % 1 2 3 O obsprob(1,1,1,find(chars == 'a')) = 1.0; obsprob(1,2,1,find(chars == 'x')) = 1.0; obsprob(1,2,2,find(chars == 'y')) = 1.0; obsprob(1,3,1,find(chars == 'b')) = 1.0; obsprob(2,1,1,find(chars == 'c')) = 1.0; obsprob(2,2,1,find(chars == 'x')) = 1.0; obsprob(2,2,2,find(chars == 'y')) = 1.0; obsprob(2,3,1,find(chars == 'd')) = 1.0; Oargs = {'CPT', obsprob}; bnet = mk_hhmm('Qsizes', Qsize, 'Osize', Osize, 'discrete_obs', 1, ... 'Oargs', Oargs, 'Ops', Qnodes(1:3), ... 'startprob', startprob, 'transprob', transprob, 'termprob', termprob); Q1 = 1; Q2 = 2; Q3 = 3; F3 = 4; F2 = 5; Onode = 6; Qnodes = [Q1 Q2 Q3]; Fnodes = [F2 F3]; for seqi=1:3 evidence = sample_dbn(bnet, 'stop_test', 'is_F2_true_D3'); ev = cell2num(evidence); chars(ev(end,:)) %T = size(evidence, 2) %pretty_print_hhmm_parse(evidence, Qnodes, Fnodes, Onode, chars); end