public void testInfluenceSemantics()
{
Assert.AreEqual(1, a.getChildren().Count);
Assert.IsTrue(a.getChildren().Contains(c));
Assert.AreEqual(0, a.getParents().Count);
Assert.AreEqual(1, b.getChildren().Count);
Assert.IsTrue(b.getChildren().Contains(c));
Assert.AreEqual(0, b.getParents().Count);
Assert.AreEqual(2, c.getChildren().Count);
Assert.IsTrue(c.getChildren().Contains(d));
Assert.IsTrue(c.getChildren().Contains(e));
Assert.AreEqual(2, c.getParents().Count);
Assert.IsTrue(c.getParents().Contains(a));
Assert.IsTrue(c.getParents().Contains(b));
Assert.AreEqual(0, d.getChildren().Count);
Assert.AreEqual(1, d.getParents().Count);
Assert.IsTrue(d.getParents().Contains(c));
Assert.AreEqual(0, e.getChildren().Count);
Assert.AreEqual(1, e.getParents().Count);
Assert.IsTrue(e.getParents().Contains(c));
}
public double probabilityOf(String Y, bool value,
Dictionary <String, bool> evidence)
{
BayesNetNode y = getNodeOf(Y);
if (y == null)
{
throw new ApplicationException("Unable to find a node with variable "
+ Y);
}
else
{
List <BayesNetNode> parentNodes = y.getParents();
if (parentNodes.Count == 0)
{// root nodes
Dictionary <String, bool> YTable = new Dictionary <String, bool>();
YTable.Add(Y, value);
double prob = y.probabilityOf(YTable);
return(prob);
}
else
{// non rootnodes
Dictionary <String, bool> parentValues = new Dictionary <String, bool>();
foreach (BayesNetNode parent in parentNodes)
{
parentValues.Add(parent.getVariable(), evidence[parent
.getVariable()]);
}
double prob = y.probabilityOf(parentValues);
if (value.Equals(true))
{
return(prob);
}
else
{
return(1.0 - prob);
}
}
}
}
private List <BayesNetNode> markovBlanket(BayesNetNode node,
List <BayesNetNode> soFar)
{
// parents
List <BayesNetNode> parents = node.getParents();
foreach (BayesNetNode parent in parents)
{
if (!soFar.Contains(parent))
{
soFar.Add(parent);
}
}
// children
List <BayesNetNode> children = node.getChildren();
foreach (BayesNetNode child in children)
{
if (!soFar.Contains(child))
{
soFar.Add(child);
List <BayesNetNode> childsParents = child.getParents();
foreach (BayesNetNode childsParent in childsParents)
{
;
if ((!soFar.Contains(childsParent)) &&
(!(childsParent.Equals(node))))
{
soFar.Add(childsParent);
}
} // childsParents
} // end contains child
} // end child
return(soFar);
}
private List<BayesNetNode> markovBlanket(BayesNetNode node,
List<BayesNetNode> soFar)
{
// parents
List<BayesNetNode> parents = node.getParents();
foreach (BayesNetNode parent in parents)
{
if (!soFar.Contains(parent))
{
soFar.Add(parent);
}
}
// children
List<BayesNetNode> children = node.getChildren();
foreach (BayesNetNode child in children)
{
if (!soFar.Contains(child))
{
soFar.Add(child);
List<BayesNetNode> childsParents = child.getParents();
foreach (BayesNetNode childsParent in childsParents)
{
;
if ((!soFar.Contains(childsParent))
&& (!(childsParent.Equals(node))))
{
soFar.Add(childsParent);
}
}// childsParents
}// end contains child
}// end child
return soFar;
}
