Mercurial > hg > camir-aes2014
view toolboxes/FullBNT-1.0.7/bnt/CPDs/@gaussian_CPD/CPD_to_pi.m @ 0:e9a9cd732c1e tip
first hg version after svn
author | wolffd |
---|---|
date | Tue, 10 Feb 2015 15:05:51 +0000 |
parents | |
children |
line wrap: on
line source
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', [m, Q, W] = gaussian_CPD_params_given_dps(CPD, [ps n], evidence); cps = ps(CPD.cps); cpsizes = CPD.sizes(CPD.cps); pi.mu = m; pi.Sigma = Q; for k=1:length(cps) % only get pi msgs from cts parents %bk = block(k, cpsizes); bk = CPD.cps_block_ndx{k}; Bk = W(:, bk); m = msg{n}.pi_from_parent{k}; pi.Sigma = pi.Sigma + Bk * m.Sigma * Bk'; pi.mu = pi.mu + Bk * m.mu; % m.mu = u(k) end end