BNW using Octave instead of Matlab.

This version of BNW should perform the same as the original version. The only difference is that it uses Octave instead of Matlab when running BayesNet Toolbox during parameter learning.

I am calling this BNW_1.02. It can be accessed at:
compbio.uthsc.edu/BNW_1.02

1 files changed, 49 insertions, 0 deletions

diff --git a/sourcecodes/bnt-master/BNT/inference/static/@belprop_inf_engine/find_mpe.m b/sourcecodes/bnt-master/BNT/inference/static/@belprop_inf_engine/find_mpe.m
new file mode 100644
index 00000000..73bd0abc
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+++ b/sourcecodes/bnt-master/BNT/inference/static/@belprop_inf_engine/find_mpe.m
@@ -0,0 +1,49 @@
+function mpe = find_mpe(engine, evidence, varargin)
+% FIND_MPE Find the most probable explanation of the data  (belprop)
+% function mpe = find_mpe(engine, evidence,...)
+%
+% evidence{i} = [] if X(i) is hidden, and otherwise contains its observed value (scalar or column vector).
+%
+% This finds the marginally most likely value for each hidden node,
+% and may give the wrong results even if the graph is acyclic,
+% unless you set break_ties = 1.
+%
+% The following optional arguments can be specified in the form of name/value pairs:
+% [default value in brackets]
+%
+% break_ties is optional. If 1, we will force ties to be broken consistently
+%  by calling enter_evidence N times. (see Jensen96, p106) Default = 1.
+
+break_ties = 1;
+
+% parse optional params
+args = varargin;
+nargs = length(args);
+for i=1:2:nargs
+  switch args{i},
+   case 'break_ties',    break_ties = args{i+1}; 
+   otherwise,  
+    error(['invalid argument name ' args{i}]);       
+  end
+end
+
+engine = enter_evidence(engine, evidence, 'maximize', 1);
+
+observed = ~isemptycell(evidence);
+evidence = evidence(:); % hack to handle unrolled DBNs
+N = length(evidence);
+mpe = cell(1,N);
+for i=1:N
+  m = marginal_nodes(engine, i);
+  % observed nodes are all set to 1 inside the inference engine, so we must undo this
+  if observed(i)
+    mpe{i} = evidence{i};
+  else
+    mpe{i} = argmax(m.T);
+    if break_ties
+      evidence{i} = mpe{i};                             
+      [engine, ll] = enter_evidence(engine, evidence, 'maximize', 1);  
+    end
+  end
+end
+