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annotate toolboxes/FullBNT-1.0.7/bnt/examples/dynamic/HHMM/Old/remove_hhmm_end_state.m @ 0:e9a9cd732c1e tip

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first hg version after svn
author wolffd
date Tue, 10 Feb 2015 15:05:51 +0000
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wolffd@0 1 function [transprob, termprob] = remove_hhmm_end_state(A)
wolffd@0 2 % REMOVE_END_STATE Infer transition and termination probabilities from automaton with an end state
wolffd@0 3 % [transprob, termprob] = remove_end_state(A)
wolffd@0 4 % A(i,k,j) = Pr( i->j | Qps=k), where i in 1:Q, j in 1:(Q+1), and Q+1 is the end state
wolffd@0 5
wolffd@0 6 if ndims(A)==2 % top level
wolffd@0 7 Q = size(A,1);
wolffd@0 8 transprob = A(:,1:Q);
wolffd@0 9 termprob = A(:,Q+1)';
wolffd@0 10
wolffd@0 11 % rescale
wolffd@0 12 for i=1:Q
wolffd@0 13 for j=1:Q
wolffd@0 14 denom = (1-termprob(i));
wolffd@0 15 denom = denom + (denom==0)*eps;
wolffd@0 16 transprob(i,j) = transprob(i,j) / denom;
wolffd@0 17 end
wolffd@0 18 end
wolffd@0 19 else
wolffd@0 20 Q = size(A,1);
wolffd@0 21 Qk = size(A,2);
wolffd@0 22 transprob = A(:, :, 1:Q);
wolffd@0 23 termprob = A(:,:,Q+1)';
wolffd@0 24
wolffd@0 25 % rescale
wolffd@0 26 for k=1:Qk
wolffd@0 27 for i=1:Q
wolffd@0 28 for j=1:Q
wolffd@0 29 denom = (1-termprob(k,i));
wolffd@0 30 denom = denom + (denom==0)*eps;
wolffd@0 31 transprob(i,k,j) = transprob(i,k,j) / denom;
wolffd@0 32 end
wolffd@0 33 end
wolffd@0 34 end
wolffd@0 35
wolffd@0 36 end
wolffd@0 37