public virtual string ToString(int depth, IStringBuilder buf)
{
if (attributeName != null)
{
buf.Append(Util.ntimes("\t", depth));
buf.Append(Util.ntimes("***", 1));
buf.Append(attributeName + " \n");
foreach (string attributeValue in nodes.GetKeys())
{
buf.Append(Util.ntimes("\t", depth + 1));
buf.Append("+" + attributeValue);
buf.Append("\n");
DecisionTree child = nodes.Get(attributeValue);
buf.Append(child.ToString(depth + 1, TextFactory.CreateStringBuilder()));
}
}
return(buf.ToString());
}
public static ICollection <DecisionTree> getStumpsFor(DataSet ds,
string returnValueIfMatched, string returnValueIfUnmatched)
{
ICollection <string> attributes = ds.getNonTargetAttributes();
ICollection <DecisionTree> trees = CollectionFactory.CreateQueue <DecisionTree>();
foreach (string attribute in attributes)
{
ICollection <string> values = ds.getPossibleAttributeValues(attribute);
foreach (string value in values)
{
ICollection <string> unmatchedValues = Util.removeFrom(ds.getPossibleAttributeValues(attribute), value);
DecisionTree tree = getStumpFor(ds, attribute, value,
returnValueIfMatched, unmatchedValues,
returnValueIfUnmatched);
trees.Add(tree);
}
}
return(trees);
}
public override void addNode(string attributeValue, DecisionTree tree)
{
throw new RuntimeException("cannot add Node to ConstantDecisonTree");
}
public virtual void addNode(string attributeValue, DecisionTree tree)
{
nodes.Put(attributeValue, tree);
}
