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## weka.attributeSelection
Class CostSensitiveASEvaluation

    java.lang.Object
      weka.attributeSelection.ASEvaluation
          weka.attributeSelection.CostSensitiveASEvaluation

All Implemented Interfaces:
  java.io.Serializable, CapabilitiesHandler, OptionHandler, RevisionHandler

Direct Known Subclasses:
  CostSensitiveAttributeEval, CostSensitiveSubsetEval

    public abstract class CostSensitiveASEvaluation

extends ASEvaluation
implements OptionHandler, java.io.Serializable

Abstract base class for cost-sensitive subset and attribute evaluators.

Version:
  $Revision: 5987 $
Author:
  Mark Hall (mhall{[at]}pentaho{[dot]}com)
See Also:
  Serialized Form

Field Summary
`static int` | `MATRIX_ON_DEMAND` load cost matrix on demand
`static int` | `MATRIX_SUPPLIED` use explicit cost matrix
`static Tag[]` | `TAGS_MATRIX_SOURCE` Specify possible sources of the cost matrix

Constructor Summary
`CostSensitiveASEvaluation()`

Method Summary
`void` | `buildEvaluator(Instances data)` Generates a attribute evaluator.
`java.lang.String` | `costMatrixSourceTipText()`
`java.lang.String` | `costMatrixTipText()`
`java.lang.String` | `defaultEvaluatorString()` Return the name of the default evaluator.
`java.lang.String` | `evaluatorTipText()` Returns the tip text for this property
`Capabilities` | `getCapabilities()` Returns default capabilities of the classifier.
`CostMatrix` | `getCostMatrix()` Gets the misclassification cost matrix.
`SelectedTag` | `getCostMatrixSource()` Gets the source location method of the cost matrix.
`ASEvaluation` | `getEvaluator()` Get the evaluator used as the base evaluator.
`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 subset evaluator.
`java.lang.String` | `getRevision()` Returns the revision string.
`int` | `getSeed()` Gets the seed for the random number generations.
`java.lang.String` | `globalInfo()`
`java.util.Enumeration` | `listOptions()` Returns an enumeration describing the available options.
`java.lang.String` | `onDemandDirectoryTipText()`
`int[]` | `postProcess(int[] attributeSet)` Provides a chance for a attribute evaluator to do any special post processing of the selected attribute set.
`java.lang.String` | `seedTipText()` Returns the tip text for this property
`void` | `setCostMatrix(CostMatrix newCostMatrix)` Sets the misclassification cost matrix.
`void` | `setCostMatrixSource(SelectedTag newMethod)` Sets the source location of the cost matrix.
`void` | `setEvaluator(ASEvaluation newEvaluator)` Set the base evaluator.
`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.
`void` | `setSeed(int seed)` Set the seed for random number generation.
`java.lang.String` | `toString()` Output a representation of this evaluator

Methods inherited from class weka.attributeSelection.ASEvaluation
`forName, makeCopies`

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

Field Detail

### MATRIX_ON_DEMAND

    public static final int MATRIX_ON_DEMAND

  load cost matrix on demand

  See Also:
    Constant Field Values

### MATRIX_SUPPLIED

    public static final int MATRIX_SUPPLIED

  use explicit cost matrix

  See Also:
    Constant Field Values

### TAGS_MATRIX_SOURCE

    public static final Tag[] TAGS_MATRIX_SOURCE

  Specify possible sources of the cost matrix

Constructor Detail

### CostSensitiveASEvaluation

    public CostSensitiveASEvaluation()

Method Detail

### listOptions

    public java.util.Enumeration 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(java.lang.String[] options)
                    throws java.lang.Exception

  Parses a given list of options.

  Valid options are:

       -C <cost file name>
        File name of a cost matrix to use. If this is not supplied,
        a cost matrix will be loaded on demand. The name of the
        on-demand file is the relation name of the training data
        plus ".cost", and the path to the on-demand file is
        specified with the -N option.

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

       -cost-matrix <matrix>
        The cost matrix in Matlab single line format.

       -S <integer>
        The seed to use for random number generation.

       -W
        Full name of base evaluator.
        (default: weka.attributeSelection.CfsSubsetEval)

  Options after -- are passed to the designated evaluator.

  Specified by:
    `setOptions` in interface `OptionHandler`
  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 subset evaluator.

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

### globalInfo

    public java.lang.String globalInfo()

  Returns:
    a description of the classifier suitable for displaying in the explorer/experimenter gui

### defaultEvaluatorString

    public java.lang.String defaultEvaluatorString()

  Return the name of the default evaluator.

  Returns:
    the name of the default evaluator

### costMatrixSourceTipText

    public java.lang.String costMatrixSourceTipText()

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

### getCostMatrixSource

    public SelectedTag getCostMatrixSource()

  Gets the source location method of the cost matrix. Will be one of MATRIX_ON_DEMAND or MATRIX_SUPPLIED.

  Returns:
    the cost matrix source.

### setCostMatrixSource

    public void setCostMatrixSource(SelectedTag newMethod)

  Sets the source location of the cost matrix. Values other than MATRIX_ON_DEMAND or MATRIX_SUPPLIED will be ignored.

  Parameters:
    `newMethod` - the cost matrix location method.

### onDemandDirectoryTipText

    public java.lang.String onDemandDirectoryTipText()

  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.

### costMatrixTipText

    public java.lang.String costMatrixTipText()

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

### getCostMatrix

    public CostMatrix getCostMatrix()

  Gets the misclassification cost matrix.

  Returns:
    the cost matrix

### setCostMatrix

    public void setCostMatrix(CostMatrix newCostMatrix)

  Sets the misclassification cost matrix.

  Parameters:
    `newCostMatrix` - the cost matrix

### seedTipText

    public java.lang.String seedTipText()

  Returns the tip text for this property

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

### setSeed

    public void setSeed(int seed)

  Set the seed for random number generation.

  Parameters:
    `seed` - the seed

### getSeed

    public int getSeed()

  Gets the seed for the random number generations.

  Returns:
    the seed for the random number generation

### evaluatorTipText

    public java.lang.String evaluatorTipText()

  Returns the tip text for this property

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

### setEvaluator

    public void setEvaluator(ASEvaluation newEvaluator)
                      throws java.lang.IllegalArgumentException

  Set the base evaluator.

  Parameters:
    `newEvaluator` - the evaluator to use.
  Throws:
    `java.lang.IllegalArgumentException` - if the evaluator is of the wrong type

### getEvaluator

    public ASEvaluation getEvaluator()

  Get the evaluator used as the base evaluator.

  Returns:
    the evaluator used as the base evaluator

### getCapabilities

    public Capabilities getCapabilities()

  Returns default capabilities of the classifier.

  Specified by:
    `getCapabilities` in interface `CapabilitiesHandler`
  Overrides:
    `getCapabilities` in class `ASEvaluation`
  Returns:
    the capabilities of this classifier
  See Also:
    `Capabilities`

### buildEvaluator

    public void buildEvaluator(Instances data)
                        throws java.lang.Exception

  Generates a attribute evaluator. Has to initialize all fields of the evaluator that are not being set via options.

  Specified by:
    `buildEvaluator` in class `ASEvaluation`
  Parameters:
    `data` - set of instances serving as training data
  Throws:
    `java.lang.Exception` - if the evaluator has not been generated successfully

### postProcess

    public int[] postProcess(int[] attributeSet)
                      throws java.lang.Exception

  Provides a chance for a attribute evaluator to do any special post processing of the selected attribute set.

  Overrides:
    `postProcess` in class `ASEvaluation`
  Parameters:
    `attributeSet` - the set of attributes found by the search
  Returns:
    a possibly ranked list of postprocessed attributes
  Throws:
    `java.lang.Exception` - if postprocessing fails for some reason

### toString

    public java.lang.String toString()

  Output a representation of this evaluator

  Overrides:
    `toString` in class `java.lang.Object`
  Returns:
    a string representation of the classifier

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

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

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