weka.classifiers

Class JythonClassifier

java.lang.Object

weka.classifiers.Classifier

weka.classifiers.JythonClassifier

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, CapabilitiesHandler, OptionHandler, RevisionHandler

public class JythonClassifier
extends Classifier

A wrapper class for Jython code. Even though the classifier is serializable, the trained classifier cannot be stored persistently. I.e., one cannot store a model file and re-load it at a later point in time again to make predictions.

Valid options are:

 -J <filename>
  The Jython module to load (full path)
  Options after '--' will be passed on to the Jython module.

 -P <directory[,directory,...]>
  The paths to add to 'sys.path' (comma-separated list).

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

Options after "--" will be passed onto the Jython module.

Partially based on this code.

Version:

$Revision: 5536 $

Author:

FracPete (fracpete at waikato dot ac dot nz)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
JythonClassifier() default constructor

Method Summary

Methods

Modifier and Type	Method and Description
void	buildClassifier(Instances instances) Generates the classifier.
double	classifyInstance(Instance instance) Classifies a given instance.
double[]	distributionForInstance(Instance instance) Calculates the class membership probabilities for the given test instance.
Capabilities	getCapabilities() Returns default capabilities of the classifier.
java.io.File	getJythonModule() Gets the Jython module.
java.lang.String	getJythonOptions() Gets the Jython module options.
java.lang.String	getJythonPaths() Gets the additional Jython paths.
java.lang.String[]	getOptions() Gets the current settings of the Classifier.
java.lang.String	getRevision() Returns the revision string.
java.lang.String	globalInfo() Returns a string describing classifier
java.lang.String	jythonModuleTipText() Returns the tip text for this property
java.lang.String	jythonOptionsTipText() Returns the tip text for this property
java.lang.String	jythonPathsTipText() Returns the tip text for this property
java.util.Enumeration	listOptions() Returns an enumeration describing the available options.
static void	main(java.lang.String[] args) Main method for testing this class.
void	setJythonModule(java.io.File value) Sets the Jython module.
void	setJythonOptions(java.lang.String value) Sets the Jython module options.
void	setJythonPaths(java.lang.String value) Sets the additional Jython paths.
void	setOptions(java.lang.String[] options) Parses a given list of options.
java.lang.String	toString() Returns a description of the classifier.

Methods inherited from class weka.classifiers.Classifier

debugTipText, forName, getDebug, makeCopies, makeCopy, setDebug

Methods inherited from class java.lang.Object

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

Constructor Detail

JythonClassifier

public JythonClassifier()

default constructor

Method Detail

globalInfo

public java.lang.String globalInfo()

Returns a string describing classifier

Returns:

a description 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 Classifier

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.

Specified by:

setOptions in interface OptionHandler

Overrides:

setOptions in class Classifier

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 Classifier

Returns:

an array of strings suitable for passing to setOptions

jythonModuleTipText

public java.lang.String jythonModuleTipText()

Returns the tip text for this property

Returns:

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

setJythonModule

public void setJythonModule(java.io.File value)

Sets the Jython module.

Parameters:

value - the Jython module

getJythonModule

public java.io.File getJythonModule()

Gets the Jython module.

Returns:

the Jython module

jythonOptionsTipText

public java.lang.String jythonOptionsTipText()

Returns the tip text for this property

Returns:

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

setJythonOptions

public void setJythonOptions(java.lang.String value)

Sets the Jython module options.

Parameters:

value - the options

getJythonOptions

public java.lang.String getJythonOptions()

Gets the Jython module options.

Returns:

the options

jythonPathsTipText

public java.lang.String jythonPathsTipText()

Returns the tip text for this property

Returns:

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

setJythonPaths

public void setJythonPaths(java.lang.String value)

Sets the additional Jython paths.

Parameters:

value - the paths (comma-separated list)

getJythonPaths

public java.lang.String getJythonPaths()

Gets the additional Jython paths.

Returns:

the paths

getCapabilities

public Capabilities getCapabilities()

Returns default capabilities of the classifier.

Specified by:

getCapabilities in interface CapabilitiesHandler

Overrides:

getCapabilities in class Classifier

Returns:

the capabilities of this classifier

See Also:

Capabilities

buildClassifier

public void buildClassifier(Instances instances)
                     throws java.lang.Exception

Generates the classifier.

Specified by:

buildClassifier in class Classifier

Parameters:

instances - set of instances serving as training data

Throws:

java.lang.Exception - if the classifier has not been generated successfully

classifyInstance

public double classifyInstance(Instance instance)
                        throws java.lang.Exception

Classifies a given instance.

Overrides:

classifyInstance in class Classifier

Parameters:

instance - the instance to be classified

Returns:

index of the predicted class

Throws:

java.lang.Exception - if an error occurred during the prediction

distributionForInstance

public double[] distributionForInstance(Instance instance)
                                 throws java.lang.Exception

Calculates the class membership probabilities for the given test instance.

Overrides:

distributionForInstance in class Classifier

Parameters:

instance - the instance to be classified

Returns:

predicted class probability distribution

Throws:

java.lang.Exception - if class is numeric

toString

public java.lang.String toString()

Returns a description of the classifier.

Overrides:

toString in class java.lang.Object

Returns:

a description of the classifier as a string.

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 for testing this class.

Parameters:

args - the options