Package weka.experiment

# Class RegressionSplitEvaluator

java.lang.Object
weka.experiment.RegressionSplitEvaluator

All Implemented Interfaces:
  `Serializable`, `AdditionalMeasureProducer`, `OptionHandler`, `RevisionHandler`, `SplitEvaluator`

public class RegressionSplitEvaluator extends Object implements SplitEvaluator, OptionHandler, AdditionalMeasureProducer, RevisionHandler
A SplitEvaluator that produces results for a classification scheme on a numeric class attribute.

Valid options are:

     -no-size
      Skips the determination of sizes (train/test/classifier)
      (default: sizes are determined)

     -W <class name>
      The full class name of the classifier.
      eg: weka.classifiers.bayes.NaiveBayes

     Options specific to classifier weka.classifiers.rules.ZeroR:

     -D
      If set, classifier is run in debug mode and
      may output additional info to the console

All options after -- will be passed to the classifier.

Version:
  $Revision: 11323 $
Author:
  Len Trigg (trigg@cs.waikato.ac.nz)
See Also:
  - Serialized Form

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `RegressionSplitEvaluator()`
  No args constructor.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `String`
  `classifierTipText()`
  Returns the tip text for this property
  `Enumeration<String>`
  `enumerateMeasures()`
  Returns an enumeration of any additional measure names that might be in the classifier
  `Classifier`
  `getClassifier()`
  Get the value of Classifier.
  `Object[]`
  `getKey()`
  Gets the key describing the current SplitEvaluator.
  `String[]`
  `getKeyNames()`
  Gets the names of each of the key columns produced for a single run.
  `Object[]`
  `getKeyTypes()`
  Gets the data types of each of the key columns produced for a single run.
  `double`
  `getMeasure(String additionalMeasureName)`
  Returns the value of the named measure
  `boolean`
  `getNoSizeDetermination()`
  Returns whether the size determination (train/test/classifer) is skipped.
  `String[]`
  `getOptions()`
  Gets the current settings of the Classifier.
  `String`
  `getRawResultOutput()`
  Gets the raw output from the classifier
  `Object[]`
  `getResult(Instances train, Instances test)`
  Gets the results for the supplied train and test datasets.
  `String[]`
  `getResultNames()`
  Gets the names of each of the result columns produced for a single run.
  `Object[]`
  `getResultTypes()`
  Gets the data types of each of the result columns produced for a single run.
  `String`
  `getRevision()`
  Returns the revision string.
  `String`
  `globalInfo()`
  Returns a string describing this split evaluator
  `Enumeration<Option>`
  `listOptions()`
  Returns an enumeration describing the available options..
  `String`
  `noSizeDeterminationTipText()`
  Returns the tip text for this property
  `void`
  `setAdditionalMeasures(String[] additionalMeasures)`
  Set a list of method names for additional measures to look for in Classifiers.
  `void`
  `setClassifier(Classifier newClassifier)`
  Sets the classifier.
  `void`
  `setClassifierName(String newClassifierName)`
  Set the Classifier to use, given it's class name.
  `void`
  `setNoSizeDetermination(boolean value)`
  Sets whether the size determination (train/test/classifer) is skipped.
  `void`
  `setOptions(String[] options)`
  Parses a given list of options.
  `String`
  `toString()`
  Returns a text description of the split evaluator.

  ### Methods inherited from class java.lang.Object

  `equals, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- ## Constructor Details

  - ### RegressionSplitEvaluator

    public RegressionSplitEvaluator()
    No args constructor.

- ## Method Details

  - ### globalInfo

    public String globalInfo()
    Returns a string describing this split evaluator
    Returns:
      a description of the split evaluator suitable for displaying in the explorer/experimenter gui

  - ### listOptions

    public Enumeration<Option> listOptions()
    Returns an enumeration describing the available options..
    Specified by:
      `listOptions` in interface `OptionHandler`
    Returns:
      an enumeration of all the available options.

  - ### setOptions

    public void setOptions(String[] options) throws Exception
    Parses a given list of options.

    Valid options are:

         -no-size
          Skips the determination of sizes (train/test/classifier)
          (default: sizes are determined)

         -W <class name>
          The full class name of the classifier.
          eg: weka.classifiers.bayes.NaiveBayes

         Options specific to classifier weka.classifiers.rules.ZeroR:

         -D
          If set, classifier is run in debug mode and
          may output additional info to the console

    All option after -- will be passed to the classifier.
    Specified by:
      `setOptions` in interface `OptionHandler`
    Parameters:
      `options` - the list of options as an array of strings
    Throws:
      `Exception` - if an option is not supported

  - ### getOptions

    public String[] getOptions()
    Gets the current settings of the Classifier.
    Specified by:
      `getOptions` in interface `OptionHandler`
    Returns:
      an array of strings suitable for passing to setOptions

  - ### setAdditionalMeasures

    public void setAdditionalMeasures(String[] additionalMeasures)
    Set a list of method names for additional measures to look for in Classifiers. This could contain many measures (of which only a subset may be produceable by the current Classifier) if an experiment is the type that iterates over a set of properties.
    Specified by:
      `setAdditionalMeasures` in interface `SplitEvaluator`
    Parameters:
      `additionalMeasures` - an array of method names.

  - ### enumerateMeasures

    public Enumeration<String> enumerateMeasures()
    Returns an enumeration of any additional measure names that might be in the classifier
    Specified by:
      `enumerateMeasures` in interface `AdditionalMeasureProducer`
    Returns:
      an enumeration of the measure names

  - ### getMeasure

    public double getMeasure(String additionalMeasureName)
    Returns the value of the named measure
    Specified by:
      `getMeasure` in interface `AdditionalMeasureProducer`
    Parameters:
      `additionalMeasureName` - the name of the measure to query for its value
    Returns:
      the value of the named measure
    Throws:
      `IllegalArgumentException` - if the named measure is not supported

  - ### getKeyTypes

    public Object[] getKeyTypes()
    Gets the data types of each of the key columns produced for a single run. The number of key fields must be constant for a given SplitEvaluator.
    Specified by:
      `getKeyTypes` in interface `SplitEvaluator`
    Returns:
      an array containing objects of the type of each key column. The objects should be Strings, or Doubles.

  - ### getKeyNames

    public String[] getKeyNames()
    Gets the names of each of the key columns produced for a single run. The number of key fields must be constant for a given SplitEvaluator.
    Specified by:
      `getKeyNames` in interface `SplitEvaluator`
    Returns:
      an array containing the name of each key column

  - ### getKey

    public Object[] getKey()
    Gets the key describing the current SplitEvaluator. For example This may contain the name of the classifier used for classifier predictive evaluation. The number of key fields must be constant for a given SplitEvaluator.
    Specified by:
      `getKey` in interface `SplitEvaluator`
    Returns:
      an array of objects containing the key.

  - ### getResultTypes

    public Object[] getResultTypes()
    Gets the data types of each of the result columns produced for a single run. The number of result fields must be constant for a given SplitEvaluator.
    Specified by:
      `getResultTypes` in interface `SplitEvaluator`
    Returns:
      an array containing objects of the type of each result column. The objects should be Strings, or Doubles.

  - ### getResultNames

    public String[] getResultNames()
    Gets the names of each of the result columns produced for a single run. The number of result fields must be constant for a given SplitEvaluator.
    Specified by:
      `getResultNames` in interface `SplitEvaluator`
    Returns:
      an array containing the name of each result column

  - ### getResult

    public Object[] getResult(Instances train, Instances test) throws Exception
    Gets the results for the supplied train and test datasets. Now performs a deep copy of the classifier before it is built and evaluated (just in case the classifier is not initialized properly in buildClassifier()).
    Specified by:
      `getResult` in interface `SplitEvaluator`
    Parameters:
      `train` - the training Instances.
      `test` - the testing Instances.
    Returns:
      the results stored in an array. The objects stored in the array may be Strings, Doubles, or null (for the missing value).
    Throws:
      `Exception` - if a problem occurs while getting the results

  - ### classifierTipText

    public String classifierTipText()
    Returns the tip text for this property
    Returns:
      tip text for this property suitable for displaying in the explorer/experimenter gui

  - ### getClassifier

    public Classifier getClassifier()
    Get the value of Classifier.
    Returns:
      Value of Classifier.

  - ### setClassifier

    public void setClassifier(Classifier newClassifier)
    Sets the classifier.
    Parameters:
      `newClassifier` - the new classifier to use.

  - ### getNoSizeDetermination

    public boolean getNoSizeDetermination()
    Returns whether the size determination (train/test/classifer) is skipped.
    Returns:
      true if size determination skipped

  - ### setNoSizeDetermination

    public void setNoSizeDetermination(boolean value)
    Sets whether the size determination (train/test/classifer) is skipped.
    Parameters:
      `value` - true if to determine sizes

  - ### noSizeDeterminationTipText

    public String noSizeDeterminationTipText()
    Returns the tip text for this property
    Returns:
      tip text for this property suitable for displaying in the explorer/experimenter gui

  - ### setClassifierName

    public void setClassifierName(String newClassifierName) throws Exception
    Set the Classifier to use, given it's class name. A new classifier will be instantiated.
    Parameters:
      `newClassifierName` - the Classifier class name.
    Throws:
      `Exception` - if the class name is invalid.

  - ### getRawResultOutput

    public String getRawResultOutput()
    Gets the raw output from the classifier
    Specified by:
      `getRawResultOutput` in interface `SplitEvaluator`
    Returns:
      the raw output from the classifier

  - ### toString

    public String toString()
    Returns a text description of the split evaluator.
    Overrides:
      `toString` in class `Object`
    Returns:
      a text description of the split evaluator.

  - ### getRevision

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