comparison toolboxes/FullBNT-1.0.7/bnt/inference/@inf_engine/marginal_family.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function m = marginal_family(engine, i, t)
+% MARGINAL_FAMILY Compute the marginal on i's family (inf_engine)
+% m = marginal_family(engine, i, t)
+%
+% t defaults to 1.
+
+if nargin < 3, t = 1; end
+
+bnet = bnet_from_engine(engine);
+if t==1
+  m = marginal_nodes(engine, family(bnet.dag, i));
+else
+  ss = length(bnet.intra);
+  fam = family(bnet.dag, i+ss);
+  if any(fam<=ss)
+    % i has a parent in the preceeding slice
+    % Hence the lowest numbered slice containing the family is t-1
+    m = marginal_nodes(engine, fam, t-1);
+  else
+    % The family all fits inside slice t
+    % Hence shift the indexes back to slice 1
+    m = marginal_nodes(engine, fam-ss, t);
+  end
+end