comparison toolboxes/FullBNT-1.0.7/bnt/examples/dynamic/HHMM/abcd_hhmm.m @ 0:e9a9cd732c1e tip

first hg version after svn

+% 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