//
// PRIVATE METHODS
//
private IFactor makeFactor(IRandomVariable var, AssignmentProposition[] e, IBayesianNetwork bn)
{
INode n = bn.GetNode(var);
if (!(n is IFiniteNode))
{
throw new IllegalArgumentException("Elimination-Ask only works with finite Nodes.");
}
IFiniteNode fn = (IFiniteNode)n;
ICollection <AssignmentProposition> evidence = CollectionFactory.CreateQueue <AssignmentProposition>();
foreach (AssignmentProposition ap in e)
{
if (fn.GetCPT().Contains(ap.getTermVariable()))
{
evidence.Add(ap);
}
}
return(fn.GetCPT().GetFactorFor(evidence.ToArray()));
}
public double posteriorForParents(IRandomVariable rv)
{
INode n = bn.GetNode(rv);
if (!(n is IFiniteNode))
{
throw new IllegalArgumentException("Enumeration-Ask only works with finite Nodes.");
}
IFiniteNode fn = (IFiniteNode)n;
object[] vals = new object[1 + fn.GetParents().Size()];
int idx = 0;
foreach (INode pn in n.GetParents())
{
vals[idx] = extendedValues[varIdxs.Get(pn.GetRandomVariable())];
idx++;
}
vals[idx] = extendedValues[varIdxs.Get(rv)];
return(fn.GetCPT().GetValue(vals));
}