Package weka.classifiers.trees.j48
Class C45PruneableClassifierTree
- java.lang.Object
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- weka.classifiers.trees.j48.ClassifierTree
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- weka.classifiers.trees.j48.C45PruneableClassifierTree
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- All Implemented Interfaces:
java.io.Serializable
,CapabilitiesHandler
,Drawable
,RevisionHandler
public class C45PruneableClassifierTree extends ClassifierTree
Class for handling a tree structure that can be pruned using C4.5 procedures.- Version:
- $Revision: 8986 $
- Author:
- Eibe Frank (eibe@cs.waikato.ac.nz)
- See Also:
- Serialized Form
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Field Summary
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Fields inherited from interface weka.core.Drawable
BayesNet, Newick, NOT_DRAWABLE, TREE
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Constructor Summary
Constructors Constructor Description C45PruneableClassifierTree(ModelSelection toSelectLocModel, boolean pruneTree, float cf, boolean raiseTree, boolean cleanup)
Constructor for pruneable tree structure.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
buildClassifier(Instances data)
Method for building a pruneable classifier tree.void
collapse()
Collapses a tree to a node if training error doesn't increase.Capabilities
getCapabilities()
Returns default capabilities of the classifier tree.java.lang.String
getRevision()
Returns the revision string.void
prune()
Prunes a tree using C4.5's pruning procedure.-
Methods inherited from class weka.classifiers.trees.j48.ClassifierTree
assignIDs, buildTree, buildTree, classifyInstance, cleanup, distributionForInstance, graph, graphType, numLeaves, numNodes, prefix, toSource, toString
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Constructor Detail
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C45PruneableClassifierTree
public C45PruneableClassifierTree(ModelSelection toSelectLocModel, boolean pruneTree, float cf, boolean raiseTree, boolean cleanup) throws java.lang.Exception
Constructor for pruneable tree structure. Stores reference to associated training data at each node.- Parameters:
toSelectLocModel
- selection method for local splitting modelpruneTree
- true if the tree is to be prunedcf
- the confidence factor for pruningraiseTree
-cleanup
-- Throws:
java.lang.Exception
- if something goes wrong
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Method Detail
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getCapabilities
public Capabilities getCapabilities()
Returns default capabilities of the classifier tree.- Specified by:
getCapabilities
in interfaceCapabilitiesHandler
- Overrides:
getCapabilities
in classClassifierTree
- Returns:
- the capabilities of this classifier tree
- See Also:
Capabilities
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buildClassifier
public void buildClassifier(Instances data) throws java.lang.Exception
Method for building a pruneable classifier tree.- Overrides:
buildClassifier
in classClassifierTree
- Parameters:
data
- the data for building the tree- Throws:
java.lang.Exception
- if something goes wrong
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collapse
public final void collapse()
Collapses a tree to a node if training error doesn't increase.
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prune
public void prune() throws java.lang.Exception
Prunes a tree using C4.5's pruning procedure.- Throws:
java.lang.Exception
- if something goes wrong
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getRevision
public java.lang.String getRevision()
Returns the revision string.- Specified by:
getRevision
in interfaceRevisionHandler
- Overrides:
getRevision
in classClassifierTree
- Returns:
- the revision
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