Package weka.classifiers.trees.ht

Class SplitNode

java.lang.Object

weka.classifiers.trees.ht.HNode

weka.classifiers.trees.ht.SplitNode

All Implemented Interfaces:

Serializable

public class SplitNode
extends HNode

Class for a node that splits the data in a Hoeffding tree

Version:

$Revision: 10169 $

Author:

Richard Kirkby (rkirkby@cs.waikato.ac.nz), Mark Hall (mhall{[at]}pentaho{[dot]}com)

See Also:

• Serialized Form

Field Summary

Fields inherited from class weka.classifiers.trees.ht.HNode

m_classDistribution

Constructor Summary

Constructors

Constructor	Description
SplitNode(Map<String,WeightMass> classDistrib, Split split)	Construct a new SplitNode

Method Summary

Modifier and Type	Method	Description
String	branchForInstance(Instance inst)	Return the branch that the supplied instance goes down
void	graphTree(StringBuffer buff)
int	installNodeNums(int nodeNum)
boolean	isLeaf()	Returns true if this is a leaf
LeafNode	leafForInstance(Instance inst, SplitNode parent, String parentBranch)	Return the leaf that the supplied instance ends up at
int	numChildred()	Number of child nodes
void	setChild(String branch, HNode child)	Add a child
void	updateNode(Instance inst)	Update the node with the supplied instance

Methods inherited from class weka.classifiers.trees.ht.HNode

classDistributionIsPure, getDistribution, numEntriesInClassDistribution, toString, totalWeight, updateDistribution

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SplitNode

public SplitNode(Map<String,WeightMass> classDistrib,
 Split split)

Construct a new SplitNode

Parameters:

classDistrib - the class distribution

split - the split

Method Details

branchForInstance

public String branchForInstance(Instance inst)

Return the branch that the supplied instance goes down

Parameters:

inst - the instance to find the branch for

Returns:

the branch that the supplied instance goes down

isLeaf

public boolean isLeaf()

Description copied from class: HNode

Returns true if this is a leaf

Overrides:

isLeaf in class HNode

Returns:

numChildred

public int numChildred()

Number of child nodes

Returns:

the number of child nodes

setChild

public void setChild(String branch,
 HNode child)

Add a child

Parameters:

branch - the branch for the child

child - the child itself

leafForInstance

public LeafNode leafForInstance(Instance inst,
 SplitNode parent,
 String parentBranch)

Description copied from class: HNode

Return the leaf that the supplied instance ends up at

Overrides:

leafForInstance in class HNode

Parameters:

inst - the instance to find the leaf for

parent - the parent node

parentBranch - the parent branch

Returns:

the leaf that the supplied instance ends up at

updateNode

public void updateNode(Instance inst)

Description copied from class: HNode

Update the node with the supplied instance

Specified by:

updateNode in class HNode

Parameters:

inst - the instance to update with

installNodeNums

public int installNodeNums(int nodeNum)

Overrides:

installNodeNums in class HNode

graphTree

public void graphTree(StringBuffer buff)

Overrides:

graphTree in class HNode