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diff toolboxes/FullBNT-1.0.7/bnt/inference/online/@hmm_2TBN_inf_engine/backT.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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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolboxes/FullBNT-1.0.7/bnt/inference/online/@hmm_2TBN_inf_engine/backT.m	Tue Feb 10 15:05:51 2015 +0000
@@ -0,0 +1,11 @@
+function b = backT(engine, f, t)
+
+b.t = t;
+b.obslik = f.obslik;
+Q = length(f.alpha);
+b.beta = ones(Q,1);
+b.gamma = f.alpha;
+if t > 1
+  bb_t = b.obslik;
+  b.xi = normalise((engine.transprob .* (f.past_alpha * bb_t'))); % T-1,T
+end