comparison toolboxes/FullBNT-1.0.7/bnt/inference/online/@jtree_2TBN_inf_engine/back_mpe.m @ 0:e9a9cd732c1e tip

first hg version after svn

+function [b, mpe] = back_mpe(engine, bfuture, f, ev2, t)
+
+if f.t ~= t
+  error('mixed up time stamps')
+end
+if t==1
+  error('should call back1_mpe')
+end
+
+maximize = 1;
+bnet = bnet_from_engine(engine);
+ss = bnet.nnodes_per_slice;
+
+int = engine.interface;
+D = engine.in_clq;
+C = engine.out_clq;
+phiD = marginalize_pot(bfuture.clpot{D}, int, maximize);
+phiD = set_domain_pot(phiD, int+ss); % shift to slice 2
+phiC = marginalize_pot(f.clpot{C}, int+ss, maximize);
+ratio = divide_by_pot(phiD, phiC);
+f.clpot{C} = multiply_by_pot(f.clpot{C}, ratio);
+
+[mpe, b.clpot] = find_max_config(engine.jtree_engine, f.clpot, f.seppot, ev2);
+mpe = mpe((1:ss)+ss); % extract values for slice 2
+for c=1:length(b.clpot)
+  [b.clpot{c}, ll(c)] = normalize_pot(b.clpot{c});
+end
+b.t = t;