Changeset 1005

Timestamp:

05/27/10 13:08:50 (15 years ago)

Author:

smidl

Message:

MixEf? example

Files:

• applications/bdmtoolbox/tutorial/userguide/mixef_basic.m (modified) (1 diff)

applications/bdmtoolbox/tutorial/userguide/mixef_basic.m

@@ -2 +2 @@
 
 com.class='ARX';
-com.rv = RV({'d'},[2],[0]);
+com.yrv = RV({'d'},[2],[0]);
 com.rgr = RV({},[],[]);
 
 Data = randn(2,20);
 
-M=mixef_init(Data,com);
+[Mix0,P0]=mixef_init(Data,com);
+
+% show predictor
+
+Pred = bm_epredictor(Mix0);
+epdf_2dplot(Pred);
+
+% Do Quasi Bayes
+
+tic
+%use same or new data
+MixQB = Mix0; 
+n = length(MixQB.Coms);
+for t=1:size(Data,2)
+    log_w_nn = zeros(1,n);
+    % get predictions
+    for c=1:n
+        yt = Data(:,t);
+        [dummy, log_w_nn(c)]=bm_bayes(MixQB.Coms{c}, yt);
+    end
+    % normalize weights
+    w = exp(log_w_nn-max(log_w_nn));
+    w = w/sum(w);
+    
+    for c=1:n
+        yt = Data(:,t);
+        [MixQB.Coms{c}]=bm_bayes(MixQB.Coms{c}, yt);
+    end
+end
+toc
+
+tic
+% should be the same as:
+% MixQBc = bm_bayes_batch(MixQB,Data);
+toc
+
+%% display results
+
+figure(2);
+PredQB = bm_epredictor(MixQB);
+epdf_2dplot(Pred);
+
+%% relations between components
+Batta_dist=zeros(n);
+for i=1:n
+    for j=i:n
+        Batta_dist(i,j) = enorm_bhattacharyya(PredQB.pdfs{i}, PredQB.pdfs{j});
+    end
+end
+imagesc(Batta_dist);