edu.udo.cs.yale.operator.learner.meta
Class Bagging

java.lang.Object
  edu.udo.cs.yale.operator.Operator
      edu.udo.cs.yale.operator.OperatorChain
          edu.udo.cs.yale.operator.learner.meta.AbstractMetaLearner
              edu.udo.cs.yale.operator.learner.meta.Bagging

All Implemented Interfaces:

ConfigurationListener, Learner

public class Bagging
extends AbstractMetaLearner

This Bagging implementation can be used with all learners available in YALE, not only the ones which originally are part of the Weka package.

Version:

$Id: Bagging.java,v 1.5 2006/08/03 14:39:37 ingomierswa Exp $

Author:

Martin Scholz

Field Summary

protected int	currentIteration
static java.lang.String	INTERNAL_BOOTSTRAP Name of the flag indicating internal bootstrapping.
static java.lang.String	NUM_OF_ITERATIONS Name of the variable specifying the maximal number of iterations of the learner.
static java.lang.String	USE_CONFIDENCES Name of the flag indicating internal bootstrapping.

Constructor Summary

Bagging(OperatorDescription description)
Constructor.

Method Summary

int	getNumberOfSteps() Returns the number of steps performed by this chain.
java.util.List<ParameterType>	getParameterTypes() Returns a list of ParameterTypes describing the parameters of this operator.
Model	learn(ExampleSet exampleSet) Constructs a Model repeatedly running a base learner on subsamples.
boolean	supportsCapability(LearnerCapability lc) Overrides the method of the super class.

Methods inherited from class edu.udo.cs.yale.operator.learner.meta.AbstractMetaLearner

apply, applyInnerLearner, checkLearnerCapabilities, getEstimatedPerformance, getInnerOperatorCondition, getInputClasses, getInputDescription, getMaxNumberOfInnerOperators, getMinNumberOfInnerOperators, getOutputClasses, getWeights, shouldCalculateWeights, shouldEstimatePerformance, shouldReturnInnerOutput

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

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, 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

Methods inherited from interface edu.udo.cs.yale.operator.learner.Learner

getName

Field Detail

NUM_OF_ITERATIONS

public static final java.lang.String NUM_OF_ITERATIONS

Name of the variable specifying the maximal number of iterations of the learner.

See Also:

Constant Field Values

INTERNAL_BOOTSTRAP

public static final java.lang.String INTERNAL_BOOTSTRAP

Name of the flag indicating internal bootstrapping.

See Also:

Constant Field Values

USE_CONFIDENCES

public static final java.lang.String USE_CONFIDENCES

Name of the flag indicating internal bootstrapping.

See Also:

Constant Field Values

currentIteration

protected int currentIteration

Constructor Detail

Bagging

public Bagging(OperatorDescription description)

Constructor.

Method Detail

supportsCapability

public boolean supportsCapability(LearnerCapability lc)

Overrides the method of the super class. Returns true for polynominal class.

Specified by:

supportsCapability in interface Learner

Overrides:

supportsCapability in class AbstractMetaLearner

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

getNumberOfSteps

public int getNumberOfSteps()

Description copied from class: OperatorChain

Returns the number of steps performed by this chain.

Overrides:

getNumberOfSteps in class AbstractMetaLearner

See Also:

OperatorChain.getNumberOfSteps()

learn

public Model learn(ExampleSet exampleSet)
            throws OperatorException

Constructs a Model repeatedly running a base learner on subsamples.

Throws:

OperatorException