public override LabelType GetLabel(DomainType[] instance_features)
{
IList <Tuple <DomainType[], DistanceType, LabelType> > neighbors = new List <Tuple <DomainType[], DistanceType, LabelType> >();
foreach (Tuple <DomainType[], LabelType> neighbor in this.list)
{
neighbors.Add(new Tuple <DomainType[], DistanceType, LabelType>(neighbor.Item1, this.distance_function.Compute(neighbor.Item1, instance_features), neighbor.Item2));
}
List <Tuple <DomainType[], DistanceType, LabelType> > ordered_neighbors = new List <Tuple <DomainType[], DistanceType, LabelType> >(neighbors.OrderBy(tuple => tuple.Item2));
Tuple <DomainType[], DistanceType, LabelType>[] selected_neighbors = ToolsCollection.Crop(ordered_neighbors, this.neighbor_count);
return(voting_system.elect(selected_neighbors).Item3);
}
public Tuple <IDataSet <FeatureType, LabelType>, IDataSet <FeatureType, LabelType> > Split(double fraction)
{
List <int> instances = new List <int>(ToolsMathSeries.RangeInt32(InstanceCount));
ToolsMathCollection.ShuffleIP(instances);
int set_0_size = (int)(instances.Count * fraction);
List <int> selected_instance_indexes_0 = ToolsCollection.Crop(instances, 0, set_0_size);
List <int> selected_instance_indexes_1 = ToolsCollection.Crop(instances, set_0_size, instances.Count);
IDataSet <FeatureType, LabelType> data_set_0 = SelectInstances(selected_instance_indexes_0);
IDataSet <FeatureType, LabelType> data_set_1 = SelectInstances(selected_instance_indexes_1);
return(new Tuple <IDataSet <FeatureType, LabelType>, IDataSet <FeatureType, LabelType> >(data_set_0, data_set_1));
}