comparison toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@pearl_dbn_inf_engine/marginal_nodes.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function marginal = marginal_nodes(engine, nodes, t)
+% MARGINAL_NODES Compute the marginal on the specified query nodes (pearl_dbn)
+% marginal = marginal_nodes(engine, i, t)
+% returns Pr(X(i,t) | Y(1:T)), where X(i,t) is the i'th node in the t'th slice.
+% If enter_evidence used filtering instead of smoothing, this will return  Pr(X(i,t) | Y(1:t)).
+
+if nargin < 3, t = 1; end
+assert(length(nodes)==1);
+i = nodes(end);
+if ~myismember(i, engine.onodes)
+  marginal.T = engine.marginal{i,t};
+else
+  marginal.T = 1; % observed
+end
+
+% we convert the domain to the unrolled numbering system
+% so that update_ess extracts the right evidence.
+marginal.domain = nodes+(t-1)*engine.ss;