Class TreeFeature

java.lang.Object

org.tribuo.regression.rtree.impl.TreeFeature

All Implemented Interfaces:

Iterable<InvertedFeature>

public class TreeFeature
extends Object
implements Iterable<InvertedFeature>

An inverted feature, which stores a reference to all the values of this feature.

Can be split into two values based on an example index list.

Constructor Summary

Constructors

Constructor	Description
TreeFeature(int id)	Constructs an inverted feature with the specified feature id.

Method Summary

Modifier and Type	Method	Description
TreeFeature	deepCopy()	Returns a deep copy of this tree feature.
void	fixSize()	Fixes the size of each InvertedFeature's inner arrays.
List<InvertedFeature>	getFeature()	Gets the inverted feature values for this feature.
Iterator<InvertedFeature>	iterator()
void	observeValue(double value, int exampleID)	Observes a value for this feature.
void	sort()	Sort the list using InvertedFeature's natural ordering.
com.oracle.labs.mlrg.olcut.util.Pair<TreeFeature, TreeFeature>	split(int[] leftIndices, int[] rightIndices, IntArrayContainer firstBuffer, IntArrayContainer secondBuffer)	Splits this tree feature into two.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

TreeFeature

public TreeFeature(int id)

Constructs an inverted feature with the specified feature id.

Parameters:

id - The feature id.

Method Details

iterator

public Iterator<InvertedFeature> iterator()

Specified by:

iterator in interface Iterable<InvertedFeature>

getFeature

public List<InvertedFeature> getFeature()

Gets the inverted feature values for this feature.

Returns:

The list of feature values.

observeValue

public void observeValue(double value,
 int exampleID)

Observes a value for this feature.

Parameters:

value - The value observed.

exampleID - The example id number.

sort

public void sort()

Sort the list using InvertedFeature's natural ordering. Must be done after all elements are inserted.

fixSize

public void fixSize()

Fixes the size of each InvertedFeature's inner arrays.

split

public com.oracle.labs.mlrg.olcut.util.Pair<TreeFeature, TreeFeature> split(int[] leftIndices,
 int[] rightIndices,
 IntArrayContainer firstBuffer,
 IntArrayContainer secondBuffer)

Splits this tree feature into two.

Parameters:

leftIndices - The indices to go in the left branch.

rightIndices - The indices to go in the right branch.

firstBuffer - A buffer for temporary work.

secondBuffer - A buffer for temporary work.

Returns:

A pair of TreeFeatures, the first element is the left branch, the second the right.

toString

public String toString()

Overrides:

toString in class Object

deepCopy

public TreeFeature deepCopy()

Returns a deep copy of this tree feature.

Returns:

A deep copy.