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## weka.experiment
Class CostSensitiveClassifierSplitEvaluator

    java.lang.Object
      weka.experiment.ClassifierSplitEvaluator
          weka.experiment.CostSensitiveClassifierSplitEvaluator

All Implemented Interfaces:
  java.io.Serializable, AdditionalMeasureProducer, OptionHandler, RevisionHandler, SplitEvaluator

    public class CostSensitiveClassifierSplitEvaluator

extends ClassifierSplitEvaluator

SplitEvaluator that produces results for a classification scheme on a nominal class attribute, including weighted misclassification costs.

Valid options are:

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

     -C <index>
      The index of the class for which IR statistics
      are to be output. (default 1)

     -I <index>
      The index of an attribute to output in the
      results. This attribute should identify an
      instance in order to know which instances are
      in the test set of a cross validation. if 0
      no output (default 0).

     -P
      Add target and prediction columns to the result
      for each fold.

     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

     -D <directory>
      Name of a directory to search for cost files when loading
      costs on demand (default current directory).

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

Version:
  $Revision: 7516 $
Author:
  Len Trigg (len@reeltwo.com)
See Also:
  Serialized Form

Constructor Summary
`CostSensitiveClassifierSplitEvaluator()`

Method Summary
`java.io.File` | `getOnDemandDirectory()` Returns the directory that will be searched for cost files when loading on demand.
`java.lang.String[]` | `getOptions()` Gets the current settings of the Classifier.
`java.lang.Object[]` | `getResult(Instances train, Instances test)` Gets the results for the supplied train and test datasets.
`java.lang.String[]` | `getResultNames()` Gets the names of each of the result columns produced for a single run.
`java.lang.Object[]` | `getResultTypes()` Gets the data types of each of the result columns produced for a single run.
`java.lang.String` | `getRevision()` Returns the revision string.
`java.lang.String` | `globalInfo()` Returns a string describing this split evaluator
`java.util.Enumeration` | `listOptions()` Returns an enumeration describing the available options..
`java.lang.String` | `onDemandDirectoryTipText()` Returns the tip text for this property
`void` | `setOnDemandDirectory(java.io.File newDir)` Sets the directory that will be searched for cost files when loading on demand.
`void` | `setOptions(java.lang.String[] options)` Parses a given list of options.
`java.lang.String` | `toString()` Returns a text description of the split evaluator.

Methods inherited from class weka.experiment.ClassifierSplitEvaluator
`classifierTipText, enumerateMeasures, getAttributeID, getClassForIRStatistics, getClassifier, getKey, getKeyNames, getKeyTypes, getMeasure, getPredTargetColumn, getRawResultOutput, setAdditionalMeasures, setAttributeID, setClassForIRStatistics, setClassifier, setClassifierName, setPredTargetColumn`

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

Constructor Detail

### CostSensitiveClassifierSplitEvaluator

    public CostSensitiveClassifierSplitEvaluator()

Method Detail

### globalInfo

    public java.lang.String globalInfo()

  Returns a string describing this split evaluator

  Overrides:
    `globalInfo` in class `ClassifierSplitEvaluator`
  Returns:
    a description of the split evaluator suitable for displaying in the explorer/experimenter gui

### listOptions

    public java.util.Enumeration listOptions()

  Returns an enumeration describing the available options..

  Specified by:
    `listOptions` in interface `OptionHandler`
  Overrides:
    `listOptions` in class `ClassifierSplitEvaluator`
  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:

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

       -C <index>
        The index of the class for which IR statistics
        are to be output. (default 1)

       -I <index>
        The index of an attribute to output in the
        results. This attribute should identify an
        instance in order to know which instances are
        in the test set of a cross validation. if 0
        no output (default 0).

       -P
        Add target and prediction columns to the result
        for each fold.

       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

       -D <directory>
        Name of a directory to search for cost files when loading
        costs on demand (default current directory).

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

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

### onDemandDirectoryTipText

    public java.lang.String onDemandDirectoryTipText()

  Returns the tip text for this property

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

### getOnDemandDirectory

    public java.io.File getOnDemandDirectory()

  Returns the directory that will be searched for cost files when loading on demand.

  Returns:
    The cost file search directory.

### setOnDemandDirectory

    public void setOnDemandDirectory(java.io.File newDir)

  Sets the directory that will be searched for cost files when loading on demand.

  Parameters:
    `newDir` - The cost file search directory.

### getResultTypes

    public java.lang.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`
  Overrides:
    `getResultTypes` in class `ClassifierSplitEvaluator`
  Returns:
    an array containing objects of the type of each result column. The objects should be Strings, or Doubles.

### getResultNames

    public java.lang.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`
  Overrides:
    `getResultNames` in class `ClassifierSplitEvaluator`
  Returns:
    an array containing the name of each result column

### getResult

    public java.lang.Object[] getResult(Instances train,
                                        Instances test)
                                 throws java.lang.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`
  Overrides:
    `getResult` in class `ClassifierSplitEvaluator`
  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:
    `java.lang.Exception` - if a problem occurs while getting the results

### toString

    public java.lang.String toString()

  Returns a text description of the split evaluator.

  Overrides:
    `toString` in class `ClassifierSplitEvaluator`
  Returns:
    a text description of the split evaluator.

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

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

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