Mercurial > hg > camir-aes2014
comparison toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@ff_inf_engine/marginal_nodes.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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-1:000000000000 | 0:e9a9cd732c1e |
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1 function marginal = marginal_nodes(engine, nodes, t) | |
2 % MARGINAL_NODES Compute the marginal on the specified query nodes (ff) | |
3 % marginal = marginal_nodes(engine, i, t) | |
4 % returns Pr(X(i,t) | Y(1:T)), where X(i,t) is the i'th node in the t'th slice. | |
5 % If enter_evidence used filtering instead of smoothing, this will return Pr(X(i,t) | Y(1:t)). | |
6 | |
7 if nargin < 3, t = 1; end | |
8 assert(length(nodes)==1); | |
9 i = nodes(end); | |
10 if myismember(i, engine.hnodes) | |
11 marginal = pot_to_marginal(engine.marginals{i,t}); | |
12 else | |
13 marginal = pot_to_marginal(dpot(i, 1, 1)); % observed | |
14 end | |
15 | |
16 bnet = bnet_from_engine(engine); | |
17 ss = length(bnet.intra); | |
18 % we convert the domain to the unrolled numbering system | |
19 % so that update_ess extracts the right evidence. | |
20 marginal.domain = nodes+(t-1)*ss; |