Mercurial > hg > camir-aes2014
view toolboxes/FullBNT-1.0.7/bnt/CPDs/@discrete_CPD/log_prob_node.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_prob_node(CPD, self_ev, pev) % LOG_PROB_NODE Compute sum_m log P(x(i,m)| x(pi_i,m), theta_i) for node i (discrete) % L = log_prob_node(CPD, self_ev, pev) % % self_ev(m) is the evidence on this node in case m. % pev(i,m) is the evidence on the i'th parent in case m (if there are any parents). % (These may also be cell arrays.) [P, p] = prob_node(CPD, self_ev, pev); % P may underflow, so we use p tiny = exp(-700); p = p + (p==0)*tiny; % replace 0s by tiny L = sum(log(p));