diff toolboxes/FullBNT-1.0.7/bnt/potentials/@cgpot/normalize_pot.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/potentials/@cgpot/normalize_pot.m	Tue Feb 10 15:05:51 2015 +0000
@@ -0,0 +1,24 @@
+function [pot, loglik] = normalize_pot(pot)
+% NORMALIZE_POT Convert the CG potential Pr(X,E) into Pr(X|E) and return log Pr(E).
+% [pot, loglik] = normalize_pot(pot)
+
+% Marginalize down to [], so that the normalizing constant becomes Pr(E)
+temp = cg_can_to_mom(marginalize_pot(pot, []));
+%loglik = temp.mom{1}.logp;
+[temp2, loglik] = normalize_pot(temp.mom{1});
+  
+% Adjust scale factor to reflect the fact that the pot now represents Pr(X | E) instead of Pr(X,E).
+
+scale = -loglik;
+if 1
+switch pot.subtype
+  case 'm'
+    for i=1:pot.dsize
+      pot.mom{i} = rescale_pot(pot.mom{i}, scale);
+    end
+  case 'c'
+    for i=1:pot.dsize
+      pot.can{i} = rescale_pot(pot.can{i}, scale);
+    end
+end        
+end