diff toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@pearl_dbn_inf_engine/private/init_pearl_dbn_ev_msgs.m @ 0:e9a9cd732c1e tip

first hg version after svn

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolboxes/FullBNT-1.0.7/bnt/inference/dynamic/@pearl_dbn_inf_engine/private/init_pearl_dbn_ev_msgs.m	Tue Feb 10 15:05:51 2015 +0000
@@ -0,0 +1,28 @@
+function msg = init_pearl_dbn_ev_msgs(bnet, evidence, engine)
+
+[ss T] = size(evidence);
+pot_type = 'd';
+
+% each hidden node absorbs lambda from its observed child (if any)
+for t=1:T
+  for i=hnodes
+    c = engine.obschild(i);
+    if c > 0
+      if t==1
+	fam = family(bnet.dag, c);
+	e = bnet.equiv_class(c, 1);
+	CPDpot = CPD_to_pot(pot_type, bnet.CPD{e}, fam, bnet.node_sizes(:), bnet.cnodes(:), evidence(:,1));
+      else
+	fam = family(bnet.dag, c, 2); % within 2 slice network
+	e = bnet.equiv_class(c, 2);
+	CPDpot = CPD_to_pot(pot_type, bnet.CPD{e}, fam, bnet.node_sizes(:), bnet.cnodes(:), evidence(:,t-1:t));
+      end
+      temp = pot_to_marginal(CPDpot);
+      n = i + (t-1)*ss;
+      lam_msg = normalise(temp.T);
+      j = engine.child_index{n}(c+(t-1)*ss);
+      assert(j==1);
+      msg{n}.lambda_from_child{j} = lam_msg;
+    end
+  end
+end