Mercurial > hg > camir-aes2014
view toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@frontier_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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function marginal = marginal_nodes(engine, nodes, t) % MARGINAL_NODES Compute the marginal on the specified query nodes (frontier) % marginal = marginal_nodes(engine, nodes, t) % % 't' specifies the time slice of the earliest node in 'nodes'. % 'nodes' cannot span more than 2 time slices. % % Example: % Consider a DBN with 2 nodes per slice. % Then t=2, nodes=[1 3] refers to node 1 in slice 2 and node 1 in slice 3, % i.e., nodes 3 and 5 in the unrolled network, if nargin < 3, t = 1; end assert(length(nodes)==1); i = nodes(1); bigpot = engine.fwdback{i,t}; bnet = bnet_from_engine(engine); ss = length(bnet.intra); nodes = nodes + (t-1)*ss; %if t > 1, nodes = nodes + ss; end marginal = pot_to_marginal(marginalize_pot(bigpot, nodes));