diff toolboxes/FullBNT-1.0.7/bnt/CPDs/@hhmmF_CPD/Old/update_ess.m @ 0:cc4b1211e677 tip

initial commit to HG from
Changeset:
646 (e263d8a21543) added further path and more save "camirversion.m"

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolboxes/FullBNT-1.0.7/bnt/CPDs/@hhmmF_CPD/Old/update_ess.m	Fri Aug 19 13:07:06 2016 +0200
@@ -0,0 +1,61 @@
+function CPD = update_ess(CPD, fmarginal, evidence, ns, cnodes, hidden_bitv)
+% UPDATE_ESS Update the Expected Sufficient Statistics of a hhmmF node.
+% function CPD = update_ess(CPD, fmarginal, evidence, ns, cnodes, hidden_bitv)
+
+% Figure out the node numbers associated with each parent
+% so we extract evidence from the right place
+dom = fmarginal.domain; % Q(1) .. Q(d) F(d+1) F(d)
+Qps = fmarginal.domain(1:end-2);
+Q = Qps(end);
+Qps = Qps(1:end-1);
+
+Qsz = CPD.Qsizes(CPD.Q);
+Qpsz = prod(CPD.Qsizes(CPD.Qps)); % may be 1
+
+% We assume the F node are always hidden, but allow some of the Q nodes
+% to be observed. We do case analysis for speed.
+%We only extract prob from fmarginal.T when F(d+1)=2 i.e., model below has finished.
+% wrong -> % We sum over the possibilities that F(d+1) = 1 or 2
+
+obs_self = ~hidden_bitv(Q);
+if obs_self
+  self_val = evidence{Q};
+end
+
+if isempty(Qps) % independent of parent context
+  counts = zeros(Qsz, 2);
+  %fmarginal.T(Q(d), F(d+1), F(d))
+  if obs_self
+    marg = myreshape(fmarginal.T, [1 2 2]);
+    counts(self_val,:) = marg(1,2,:);
+    %counts(self_val,:) = marg(1,1,:) + marg(1,2,:);
+  else
+    marg = myreshape(fmarginal.T, [Qsz 2 2]);
+    counts = squeeze(marg(:,2,:));
+    %counts = squeeze(marg(:,2,:)) + squeeze(marg(:,1,:));
+  end
+else
+  counts = zeros(Qpsz, Qsz, 2);
+  %fmarginal.T(Q(1:d-1), Q(d), F(d+1), F(d))
+  obs_Qps = ~any(hidden_bitv(Qps));  % we assume that all or none of the Q  parents are observed
+  if obs_Qps
+    Qps_val = subv2ind(Qpsz, cat(1, evidence{Qps}));
+  end
+  if obs_self & obs_Qps
+    marg = myreshape(fmarginal.T, [1 1 2 2]);
+    counts(Qps_val, self_val, :) = squeeze(marg(1,1,2,:));
+    %counts(Qps_val, self_val, :) = squeeze(marg(1,1,2,:)) + squeeze(marg(1,1,1,:));
+  elseif ~obs_self & obs_Qps
+    marg = myreshape(fmarginal.T, [1 Qsz 2 2]);
+    counts(Qps_val, :, :) = squeeze(marg(1,:,2,:));
+    %counts(Qps_val, :, :) = squeeze(marg(1,:,2,:)) + squeeze(marg(1,:,1,:));
+  elseif obs_self & ~obs_Qps
+    error('not yet implemented')
+  else
+    marg = myreshape(fmarginal.T, [Qpsz Qsz 2 2]);
+    counts(:, :, :) = squeeze(marg(:,:,2,:));
+    %counts(:, :, :) = squeeze(marg(:,:,2,:)) + squeeze(marg(:,:,1,:));
+  end    
+end
+
+CPD.sub_CPD_term = update_ess_simple(CPD.sub_CPD_term, counts);