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## weka.classifiers.trees
Class M5P

    java.lang.Object
      weka.classifiers.Classifier
          weka.classifiers.trees.m5.M5Base
              weka.classifiers.trees.M5P

All Implemented Interfaces:
  java.io.Serializable, java.lang.Cloneable, AdditionalMeasureProducer, CapabilitiesHandler, Drawable, OptionHandler, RevisionHandler, TechnicalInformationHandler

    public class M5P

extends M5Base
implements Drawable

M5Base. Implements base routines for generating M5 Model trees and rules
The original algorithm M5 was invented by R. Quinlan and Yong Wang made improvements.
For more information see:
Ross J. Quinlan: Learning with Continuous Classes. In: 5th Australian Joint Conference on Artificial Intelligence, Singapore, 343-348, 1992.
Y. Wang, I. H. Witten: Induction of model trees for predicting continuous classes. In: Poster papers of the 9th European Conference on Machine Learning, 1997.

BibTeX:

     @inproceedings{Quinlan1992,
        address = {Singapore},
        author = {Ross J. Quinlan},
        booktitle = {5th Australian Joint Conference on Artificial Intelligence},
        pages = {343-348},
        publisher = {World Scientific},
        title = {Learning with Continuous Classes},
        year = {1992}
     }

     @inproceedings{Wang1997,
        author = {Y. Wang and I. H. Witten},
        booktitle = {Poster papers of the 9th European Conference on Machine Learning},
        publisher = {Springer},
        title = {Induction of model trees for predicting continuous classes},
        year = {1997}
     }

Valid options are:

     -N
      Use unpruned tree/rules

     -U
      Use unsmoothed predictions

     -R
      Build regression tree/rule rather than a model tree/rule

     -M <minimum number of instances>
      Set minimum number of instances per leaf
      (default 4)

     -L
      Save instances at the nodes in
      the tree (for visualization purposes)

Version:
  $Revision: 1.10 $
Author:
  Mark Hall
See Also:
  Serialized Form

Field Summary

Fields inherited from interface weka.core.Drawable
`BayesNet, Newick, NOT_DRAWABLE, TREE`

Constructor Summary
`M5P()` Creates a new `M5P` instance.

Method Summary
`java.lang.String[]` | `getOptions()` Gets the current settings of the classifier.
`java.lang.String` | `getRevision()` Returns the revision string.
`boolean` | `getSaveInstances()` Get whether instance data is being save.
`java.lang.String` | `graph()` Return a dot style String describing the tree.
`int` | `graphType()` Returns the type of graph this classifier represents.
`java.util.Enumeration` | `listOptions()` Returns an enumeration describing the available options
`static void` | `main(java.lang.String[] args)` Main method by which this class can be tested
`java.lang.String` | `saveInstancesTipText()` Returns the tip text for this property
`void` | `setOptions(java.lang.String[] options)` Parses a given list of options.
`void` | `setSaveInstances(boolean save)` Set whether to save instance data at each node in the tree for visualization purposes

Methods inherited from class weka.classifiers.trees.m5.M5Base
`buildClassifier, buildRegressionTreeTipText, classifyInstance, enumerateMeasures, generateRulesTipText, getBuildRegressionTree, getCapabilities, getM5RootNode, getMeasure, getMinNumInstances, getTechnicalInformation, getUnpruned, getUseUnsmoothed, globalInfo, measureNumRules, minNumInstancesTipText, setBuildRegressionTree, setMinNumInstances, setUnpruned, setUseUnsmoothed, toString, unprunedTipText, useUnsmoothedTipText`

Methods inherited from class weka.classifiers.Classifier
`debugTipText, distributionForInstance, forName, getDebug, makeCopies, makeCopy, setDebug`

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### M5P

    public M5P()

  Creates a new `M5P` instance.

Method Detail

### graphType

    public int graphType()

  Returns the type of graph this classifier represents.

  Specified by:
    `graphType` in interface `Drawable`
  Returns:
    Drawable.TREE

### graph

    public java.lang.String graph()
                           throws java.lang.Exception

  Return a dot style String describing the tree.

  Specified by:
    `graph` in interface `Drawable`
  Returns:
    a `String` value
  Throws:
    `java.lang.Exception` - if an error occurs

### saveInstancesTipText

    public java.lang.String saveInstancesTipText()

  Returns the tip text for this property

  Returns:
    tip text for this property suitable for displaying in the explorer/experimenter gui

### setSaveInstances

    public void setSaveInstances(boolean save)

  Set whether to save instance data at each node in the tree for visualization purposes

  Parameters:
    `save` - a `boolean` value

### getSaveInstances

    public boolean getSaveInstances()

  Get whether instance data is being save.

  Returns:
    a `boolean` value

### listOptions

    public java.util.Enumeration listOptions()

  Returns an enumeration describing the available options

  Specified by:
    `listOptions` in interface `OptionHandler`
  Overrides:
    `listOptions` in class `M5Base`
  Returns:
    an enumeration of all the available options

### setOptions

    public void setOptions(java.lang.String[] options)
                    throws java.lang.Exception

  Parses a given list of options.

  Valid options are:

       -N
        Use unpruned tree/rules

       -U
        Use unsmoothed predictions

       -R
        Build regression tree/rule rather than a model tree/rule

       -M <minimum number of instances>
        Set minimum number of instances per leaf
        (default 4)

       -L
        Save instances at the nodes in
        the tree (for visualization purposes)

  Specified by:
    `setOptions` in interface `OptionHandler`
  Overrides:
    `setOptions` in class `M5Base`
  Parameters:
    `options` - the list of options as an array of strings
  Throws:
    `java.lang.Exception` - if an option is not supported

### getOptions

    public java.lang.String[] getOptions()

  Gets the current settings of the classifier.

  Specified by:
    `getOptions` in interface `OptionHandler`
  Overrides:
    `getOptions` in class `M5Base`
  Returns:
    an array of strings suitable for passing to setOptions

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Overrides:
    `getRevision` in class `Classifier`
  Returns:
    the revision

### main

    public static void main(java.lang.String[] args)

  Main method by which this class can be tested

  Parameters:
    `args` - an array of options

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