Mercurial > hg > camir-aes2014
comparison toolboxes/FullBNT-1.0.7/bnt/CPDs/@gmux_CPD/CPD_to_pi.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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children |
comparison
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-1:000000000000 | 0:e9a9cd732c1e |
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1 function pi = CPD_to_pi(CPD, msg_type, n, ps, msg, evidence) | |
2 % CPD_TO_PI Compute the pi vector (gaussian) | |
3 % function pi = CPD_to_pi(CPD, msg_type, n, ps, msg, evidence) | |
4 | |
5 switch msg_type | |
6 case 'd', | |
7 error('gaussian_CPD can''t create discrete msgs') | |
8 case 'g', | |
9 dps = ps(CPD.dps); | |
10 k = evidence{dps}; | |
11 if isempty(k) | |
12 error('gmux node must have observed discrete parent') | |
13 end | |
14 m = msg{n}.pi_from_parent{k}; | |
15 B = CPD.weights(:,:,k); | |
16 pi.mu = CPD.mean(:,k) + B * m.mu; | |
17 pi.Sigma = CPD.cov(:,:,k) + B * m.Sigma * B'; | |
18 end |