edu.udo.cs.yale.operator.validation
Class WrapperXValidation

java.lang.Object
  edu.udo.cs.yale.operator.Operator
      edu.udo.cs.yale.operator.OperatorChain
          edu.udo.cs.yale.operator.validation.WrapperValidationChain
              edu.udo.cs.yale.operator.validation.WrapperXValidation

All Implemented Interfaces:

ConfigurationListener

public class WrapperXValidation
extends WrapperValidationChain

This operator evaluates the performance of feature weighting and selection algorithms. The first inner operator is the algorithm to be evaluated itself. It must return an attribute weights vector which is applied on the test data. This fold is used to create a new model using the second inner operator and retrieve a performance vector using the third inner operator. This performance vector serves as a performance indicator for the actual algorithm. This implementation of a MethodValidationChain works similar to the XValidation.

Version:

$Id: WrapperXValidation.java,v 1.7 2006/04/05 08:57:28 ingomierswa Exp $

Author:

Ingo Mierswa

See Also:

XValidation

Field Summary

private int	iteration Current iteration.
private int	number Total number of iterations.

Constructor Summary

WrapperXValidation(OperatorDescription description)

Method Summary

IOObject[]	apply() Applies all inner operators.
int	getNumberOfValidationSteps()
java.lang.Class[]	getOutputClasses() Returns the classes that are guaranteed to be returned by apply() as additional output.
java.util.List<ParameterType>	getParameterTypes() Returns a list of ParameterTypes describing the parameters of this operator.
private void	handleWeights(AttributeWeights globalWeights, AttributeWeights currentWeights)

Methods inherited from class edu.udo.cs.yale.operator.validation.WrapperValidationChain

evaluate, getInnerOperatorCondition, getInputClasses, getMaxNumberOfInnerOperators, getMinNumberOfInnerOperators, getNumberOfSteps, learn, setResult, useMethod

Methods inherited from class edu.udo.cs.yale.operator.OperatorChain

addAddListener, addOperator, addOperator, checkDeprecations, checkIO, checkNumberOfInnerOperators, checkProperties, clearErrorList, clearStepCounter, cloneOperator, countStep, createExperimentTree, delete, experimentFinished, experimentStarts, getAllInnerOperators, getCurrentStep, getIndexOfOperator, getInnerOperatorForName, getInnerOperatorsXML, getNumberOfAllOperators, getNumberOfChildrensSteps, getNumberOfOperators, getOperator, getOperatorFromAll, getOperators, isEnabled, performAdditionalChecks, removeAddListener, removeOperator, setEnabled, setExperiment, shouldReturnInnerOutput

Methods inherited from class edu.udo.cs.yale.operator.Operator

addError, addValue, addWarning, apply, createExperimentTree, createFromXML, createMarkedExperimentTree, getAddOnlyAdditionalOutput, getApplyCount, getDeliveredOutputClasses, getDeprecationInfo, getDesiredInputClasses, getErrorList, getExperiment, getInput, getInput, getInput, getInputDescription, getIOContainerForInApplyLoopBreakpoint, getName, getOperatorClassName, getOperatorDescription, getParameter, getParameterAsBoolean, getParameterAsColor, getParameterAsDouble, getParameterAsFile, getParameterAsInt, getParameterAsString, getParameterList, getParameters, getParameterType, getParent, getStartTime, getStatus, getUserDescription, getValue, getValues, getXML, hasBreakpoint, hasBreakpoint, hasInput, inApplyLoop, isParameterSet, logMessage, register, remove, rename, resume, setBreakpoint, setInput, setListParameter, setOperatorParameters, setParameter, setParameters, setParent, setUserDescription, toString, writeXML

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

number

private int number

Total number of iterations.

iteration

private int iteration

Current iteration.

Constructor Detail

WrapperXValidation

public WrapperXValidation(OperatorDescription description)

Method Detail

getNumberOfValidationSteps

public int getNumberOfValidationSteps()

Specified by:

getNumberOfValidationSteps in class WrapperValidationChain

apply

public IOObject[] apply()
                 throws OperatorException

Description copied from class: OperatorChain

Applies all inner operators. The input to this operator becomes the input of the first inner operator. The latter's output is passed to the second inner operator and so on. Note to subclassers: If subclasses (for example wrappers) want to make use of this method remember to call exactly this method (super.apply()) and do not call super.apply(IOContainer) erroneously which will result in an infinite loop. Subclasses who override this method without invoking super.apply() should at least invoke the method OperatorChain.clearStepCounter().

Overrides:

apply in class OperatorChain

Returns:

the last inner operator's output or the input itself if the chain is empty.

Throws:

OperatorException

handleWeights

private void handleWeights(AttributeWeights globalWeights,
                           AttributeWeights currentWeights)

getOutputClasses

public java.lang.Class[] getOutputClasses()

Description copied from class: Operator

Returns the classes that are guaranteed to be returned by apply() as additional output. Please note that input object which should not be consumed must also be defined by this method (e.g. for preprocessing operators). The default behavior for input consumation is defined by Operator.getInputDescription(Class) and can be changed by overwriting this method. Objects which are not consumed must not be defined as additional output in this method. May be null or an empy array (no additional output is produced).

Overrides:

getOutputClasses in class WrapperValidationChain

getParameterTypes

public java.util.List<ParameterType> getParameterTypes()

Description copied from class: Operator

Returns a list of ParameterTypes describing the parameters of this operator. The default implementation returns an empty list if no input objects can be retained and special parameters for those input objects which can be prevented from being consumed.

Overrides:

getParameterTypes in class Operator