Package weka.classifiers.trees.m5
Class YongSplitInfo
- java.lang.Object
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- weka.classifiers.trees.m5.YongSplitInfo
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Cloneable
,SplitEvaluate
,RevisionHandler
public final class YongSplitInfo extends java.lang.Object implements java.lang.Cloneable, java.io.Serializable, SplitEvaluate, RevisionHandler
Stores split information.- Version:
- $Revision: 1.4 $
- Author:
- Yong Wang (yongwang@cs.waikato.ac.nz), Mark Hall (mhall@cs.waikato.ac.nz)
- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description YongSplitInfo(int low, int high, int attr)
Constructs an object which contains the split information
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
attrSplit(int attr, Instances inst)
Finds the best splitting point for an attribute in the instancesSplitEvaluate
copy()
Makes a copy of this SplitInfo objectjava.lang.String
getRevision()
Returns the revision string.void
initialize(int low, int high, int attr)
Resets the object of split informationdouble
maxImpurity()
Returns the impurity of this splitint
position()
Returns the position of the split in the sorted values.int
splitAttr()
Returns the attribute used in this splitdouble
splitValue()
Returns the split valuejava.lang.String
toString(Instances inst)
Converts the spliting information to string
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Method Detail
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copy
public final SplitEvaluate copy() throws java.lang.Exception
Makes a copy of this SplitInfo object- Specified by:
copy
in interfaceSplitEvaluate
- Returns:
- a copy of the object
- Throws:
java.lang.Exception
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initialize
public final void initialize(int low, int high, int attr)
Resets the object of split information- Parameters:
low
- the index of the first instancehigh
- the index of the last instanceattr
- the attribute
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toString
public final java.lang.String toString(Instances inst)
Converts the spliting information to string- Parameters:
inst
- the instances
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attrSplit
public final void attrSplit(int attr, Instances inst) throws java.lang.Exception
Finds the best splitting point for an attribute in the instances- Specified by:
attrSplit
in interfaceSplitEvaluate
- Parameters:
attr
- the splitting attributeinst
- the instances- Throws:
java.lang.Exception
- if something goes wrong
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maxImpurity
public double maxImpurity()
Returns the impurity of this split- Specified by:
maxImpurity
in interfaceSplitEvaluate
- Returns:
- the impurity of this split
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splitAttr
public int splitAttr()
Returns the attribute used in this split- Specified by:
splitAttr
in interfaceSplitEvaluate
- Returns:
- the attribute used in this split
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position
public int position()
Returns the position of the split in the sorted values. -1 indicates that a split could not be found.- Specified by:
position
in interfaceSplitEvaluate
- Returns:
- an
int
value
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splitValue
public double splitValue()
Returns the split value- Specified by:
splitValue
in interfaceSplitEvaluate
- Returns:
- the split value
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Returns:
- the revision
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