camir-aes2014: toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@bk_inf_engine/marginal

first hg version after svn

rev	line source
wolffd@0	1 function m = marginal_family(engine, i, t)
wolffd@0	2 % MARGINAL_FAMILY Compute the marginal on the specified family (bk)
wolffd@0	3 % marginal = marginal_family(engine, i, t)
wolffd@0	4
wolffd@0	5 % This is just like inf_engine/marginal_family, except when we call
wolffd@0	6 % marginal_nodes, we provide a 4th argument, to tell it's a family.
wolffd@0	7
wolffd@0	8 if nargin < 3, t = 1; end
wolffd@0	9
wolffd@0	10 bnet = bnet_from_engine(engine);
wolffd@0	11 if t==1
wolffd@0	12 m = marginal_nodes(engine, family(bnet.dag, i), t, 1);
wolffd@0	13 else
wolffd@0	14 ss = length(bnet.intra);
wolffd@0	15 fam = family(bnet.dag, i+ss);
wolffd@0	16 if any(fam<=ss)
wolffd@0	17 % i has a parent in the preceeding slice
wolffd@0	18 % Hence the lowest numbered slice containing the family is t-1
wolffd@0	19 m = marginal_nodes(engine, fam, t-1, 1);
wolffd@0	20 else
wolffd@0	21 % The family all fits inside slice t
wolffd@0	22 % Hence shift the indexes back to slice 1
wolffd@0	23 m = marginal_nodes(engine, fam-ss, t, 1);
wolffd@0	24 end
wolffd@0	25 end

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