Mercurial > hg > camir-aes2014
diff toolboxes/FullBNT-1.0.7/bnt/inference/static/@global_joint_inf_engine/find_mpe.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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/toolboxes/FullBNT-1.0.7/bnt/inference/static/@global_joint_inf_engine/find_mpe.m Tue Feb 10 15:05:51 2015 +0000 @@ -0,0 +1,28 @@ +function [mpe, ll] = find_mpe(engine, evidence) +% FIND_MPE_GLOBAL Compute the most probable explanation(s) from the global joint +% [mpe, ll] = find_mpe(engine, evidence) +% +% mpe(k,i) is the most probable value of node i in the k'th global mode (cell array) +% +% We assume all nodes are discrete + +%engine = global_joint_inf_engine(bnet); +bnet = bnet_from_engine(engine); +engine = enter_evidence(engine, evidence); +S1 = struct(engine); % violate object privacy +S2 = struct(S1.jpot); % joint potential +prob = max(S2.T(:)); +modes = find(S2.T(:) == prob); + +ens = bnet.node_sizes; +onodes = find(~isemptycell(evidence)); +ens(onodes) = 1; +mpe = ind2subv(ens, modes); +for k=1:length(modes) + for i=onodes(:)' + mpe(k,i) = evidence{i}; + end +end +ll = log(prob); + +mpe = num2cell(mpe);