private void DoExtractPatterns(IDecisionTreeNode node,
List <SelectorContext> contexts, InstanceModel model,
Action <EmergingPattern> patternFound,
Feature classFeature)
{
if (node.IsLeaf)
{
EmergingPattern newPattern = Create(contexts, model, classFeature);
newPattern.Counts = node.Data;
newPattern.Supports = CalculateSupports(node.Data, classFeature);
newPattern.ClassValue = newPattern.Supports.ArgMax();
if (patternFound != null)
{
patternFound(newPattern);
}
}
else
{
for (int i = 0; i < node.Children.Length; i++)
{
SelectorContext context = new SelectorContext
{
Index = i,
Selector = node.ChildSelector,
};
contexts.Add(context);
DoExtractPatterns(node.Children[i], contexts, model, patternFound,
classFeature);
contexts.Remove(context);
}
}
}
public static bool Test(this IPatternTest test, double[] distribution, InstanceModel model, Feature classFeature)
{
var pattern = new EmergingPattern(model, classFeature, 0);
pattern.Counts = distribution;
pattern.Supports = EmergingPatternCreator.CalculateSupports(distribution, classFeature);
pattern.ClassValue = pattern.Supports.ArgMax();
return(test.Test(pattern));
}
public IEmergingPattern Clone()
{
EmergingPattern result = new EmergingPattern(Model, ClassFeature, ClassValue, Items)
{
Supports = (double[])Supports.Clone(),
Counts = (double[])Counts.Clone(),
};
return(result);
}
public EmergingPattern Create(IEnumerable <SelectorContext> contexes, InstanceModel model, Feature classFeature)
{
EmergingPattern result = new EmergingPattern(model, classFeature, 0);
foreach (SelectorContext context in contexes)
{
IChildSelector childSelector = context.Selector;
ItemBuilder builder;
if (!builderForType.TryGetValue(childSelector.GetType(), out builder))
{
throw new InvalidOperationException(string.Format("Unknown selector: '{0}'", childSelector.GetType().Name));
}
Item item = builder.GetItem(childSelector, context.Index);
item.Model = model;
result.Items.Add(item);
}
return(result);
}
