Mercurial > hg > camir-aes2014
view 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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function pi = CPD_to_pi(CPD, msg_type, n, ps, msg, evidence) % CPD_TO_PI Compute the pi vector (gaussian) % function pi = CPD_to_pi(CPD, msg_type, n, ps, msg, evidence) switch msg_type case 'd', error('gaussian_CPD can''t create discrete msgs') case 'g', dps = ps(CPD.dps); k = evidence{dps}; if isempty(k) error('gmux node must have observed discrete parent') end m = msg{n}.pi_from_parent{k}; B = CPD.weights(:,:,k); pi.mu = CPD.mean(:,k) + B * m.mu; pi.Sigma = CPD.cov(:,:,k) + B * m.Sigma * B'; end