Package weka.classifiers.trees.m5

Class Rule2

  • All Implemented Interfaces:
    Serializable, weka.core.RevisionHandler
    public class Rule2
extends Object
implements Serializable, weka.core.RevisionHandler
    Generates a single m5 tree or rule
    Version:
    $Revision$
    Author:
    Mark Hall
    See Also:
    Serialized Form

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected static int LEFT  
      protected RuleNode2 m_topOfTree
      the top of the m5 tree for this rule
      protected static int RIGHT  

    • Constructor Summary

      Constructors 
      Constructor Description
      Rule2()
      Constructor declaration

    • Field Detail

      • LEFT

        protected static int LEFT

      • RIGHT

        protected static int RIGHT

      • m_topOfTree

        protected RuleNode2 m_topOfTree
        the top of the m5 tree for this rule

    • Constructor Detail

      • Rule2

        public Rule2()
        Constructor declaration

    • Method Detail

      • buildClassifier

        public void buildClassifier​(weka.core.Instances data)
                     throws Exception
        Generates a single rule or m5 model tree.
        Parameters:
        data - set of instances serving as training data
        Throws:
        Exception - if the rule has not been generated successfully

      • classifyInstance

        public double classifyInstance​(weka.core.Instance instance)
                        throws Exception
        Calculates a prediction for an instance using this rule or M5 model tree
        Parameters:
        instance - the instance whos class value is to be predicted
        Returns:
        the prediction
        Throws:
        Exception - if a prediction can't be made.

      • topOfTree

        public RuleNode2 topOfTree()
        Returns the top of the tree.

      • toString

        public String toString()
        Return a description of the m5 tree or rule
        Overrides:
        toString in class Object
        Returns:
        a description of the m5 tree or rule as a String

      • setUnpruned

        public void setUnpruned​(boolean unpruned)
        Use unpruned tree/rules
        Parameters:
        unpruned - true if unpruned tree/rules are to be generated

      • getUnpruned

        public boolean getUnpruned()
        Get whether unpruned tree/rules are being generated
        Returns:
        true if unpruned tree/rules are to be generated

      • setUseTree

        public void setUseTree​(boolean u)
        Use an m5 tree rather than generate rules
        Parameters:
        u - true if m5 tree is to be used

      • getUseTree

        public boolean getUseTree()
        get whether an m5 tree is being used rather than rules
        Returns:
        true if an m5 tree is being used.

      • setSmoothing

        public void setSmoothing​(boolean s)
        Smooth predictions
        Parameters:
        s - true if smoothing is to be used

      • getSmoothing

        public boolean getSmoothing()
        Get whether or not smoothing has been turned on
        Returns:
        true if smoothing is being used

      • notCoveredInstances

        public weka.core.Instances notCoveredInstances()
        Get the instances not covered by this rule
        Returns:
        the instances not covered

      • stdDev

        protected static final double stdDev​(int attr,
                                     weka.core.Instances inst)
        Returns the standard deviation value of the supplied attribute index.
        Parameters:
        attr - an attribute index
        inst - the instances
        Returns:
        the standard deviation value

      • absDev

        protected static final double absDev​(int attr,
                                     weka.core.Instances inst)
        Returns the absolute deviation value of the supplied attribute index.
        Parameters:
        attr - an attribute index
        inst - the instances
        Returns:
        the absolute deviation value

      • setSaveInstances

        protected void setSaveInstances​(boolean save)
        Sets whether instances at each node in an M5 tree should be saved for visualization purposes. Default is to save memory.
        Parameters:
        save - a boolean value

      • getRegressionTree

        public boolean getRegressionTree()
        Get the value of regressionTree.
        Returns:
        Value of regressionTree.

      • setRegressionTree

        public void setRegressionTree​(boolean newregressionTree)
        Set the value of regressionTree.
        Parameters:
        newregressionTree - Value to assign to regressionTree.

      • setMinNumInstances

        public void setMinNumInstances​(double minNum)
        Set the minumum number of instances to allow at a leaf node
        Parameters:
        minNum - the minimum number of instances

      • getMinNumInstances

        public double getMinNumInstances()
        Get the minimum number of instances to allow at a leaf node
        Returns:
        a double value

      • getM5RootNode

        public RuleNode2 getM5RootNode()

      • getRevision

        public String getRevision()
        Returns the revision string.
        Specified by:
        getRevision in interface weka.core.RevisionHandler
        Returns:
        the revision