/// <summary>Generates.</summary>
/// <exception cref="InvalidOperationException">Thrown when the requested operation is invalid.</exception>
/// <param name="X">The Matrix to process.</param>
/// <param name="y">The Vector to process.</param>
/// <returns>An IModel.</returns>
public override IModel Generate(Matrix X, Vector y)
{
if (Descriptor == null)
throw new InvalidOperationException("Cannot build decision tree without type knowledge!");
this.Preprocess(X);
var tree = new Tree();
//var n = BuildUglyTree(x, y, Depth, new List<int>(x.Cols));
tree.Root = BuildTree(X, y, Depth, new List<int>(X.Cols), tree);
// have to guess something....
// especially when automating
// the thing in a Learner
// this only happens if it is something
// it has never seen.
if (Hint == double.Epsilon)
Hint = y.GetRandom(); // flip a coin...
return new DecisionTreeModel
{
Descriptor = Descriptor,
NormalizeFeatures = NormalizeFeatures,
FeatureNormalizer = FeatureNormalizer,
FeatureProperties = FeatureProperties,
Tree = tree,
Hint = Hint
};
}