Mercurial > hg > camir-aes2014
view toolboxes/FullBNT-1.0.7/bnt/CPDs/@tabular_CPD/log_prior.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 L = log_prior(CPD) % LOG_PRIOR Return log P(theta) for a tabular CPD % L = log_prior(CPD) switch CPD.prior_type case 'none', L = 0; case 'dirichlet', D = CPD.dirichlet(:); L = sum(log(D + (D==0))); case 'entropic', % log-prior = log exp(-H(theta)) = sum_i theta_i log (theta_i) fam_sz = CPD.sizes; psz = prod(fam_sz(1:end-1)); ssz = fam_sz(end); C = reshape(CPD.CPT, psz, ssz); L = sum(sum(C .* log(C + (C==0)))); end