com.rapidminer.operator.learner.tree
Class CHAIDLearner

java.lang.Object
  com.rapidminer.tools.AbstractObservable<Operator>
      com.rapidminer.operator.Operator
          com.rapidminer.operator.learner.AbstractLearner
              com.rapidminer.operator.learner.tree.AbstractTreeLearner
                  com.rapidminer.operator.learner.tree.DecisionTreeLearner
                      com.rapidminer.operator.learner.tree.CHAIDLearner

All Implemented Interfaces:

ConfigurationListener, PreviewListener, ResourceConsumer, CapabilityProvider, Learner, ParameterHandler, LoggingHandler, Observable<Operator>

public class CHAIDLearner
extends DecisionTreeLearner

The CHAID decision tree learner works like the DecisionTreeLearner with one exception: it used a chi squared based criterion instead of the information gain or gain ratio criteria.

Author:

Ingo Mierswa

Field Summary

Fields inherited from class com.rapidminer.operator.learner.tree.DecisionTreeLearner

PARAMETER_CONFIDENCE, PARAMETER_MAXIMAL_DEPTH, PARAMETER_NO_PRE_PRUNING, PARAMETER_NO_PRUNING, PARAMETER_NUMBER_OF_PREPRUNING_ALTERNATIVES

Fields inherited from class com.rapidminer.operator.learner.tree.AbstractTreeLearner

CRITERIA_CLASSES, CRITERIA_NAMES, CRITERION_ACCURACY, CRITERION_GAIN_RATIO, CRITERION_GINI_INDEX, CRITERION_INFO_GAIN, PARAMETER_CRITERION, PARAMETER_MINIMAL_GAIN, PARAMETER_MINIMAL_LEAF_SIZE, PARAMETER_MINIMAL_SIZE_FOR_SPLIT

Fields inherited from interface com.rapidminer.operator.learner.CapabilityProvider

PROPERTY_RAPIDMINER_GENERAL_CAPABILITIES_WARN

Constructor Summary

CHAIDLearner(OperatorDescription description)

Method Summary

protected Benefit	calculateBenefit(ExampleSet trainingSet, Attribute attribute) This method calculates the benefit of the given attribute.
protected Criterion	createCriterion(double minimalGain)
java.util.List<ParameterType>	getParameterTypes() Returns a list of ParameterTypes describing the parameters of this operator.
boolean	supportsCapability(OperatorCapability capability) Checks for Learner capabilities.

Methods inherited from class com.rapidminer.operator.learner.tree.DecisionTreeLearner

getPruner, getTerminationCriteria, getTreeBuilder

Methods inherited from class com.rapidminer.operator.learner.tree.AbstractTreeLearner

getModelClass, getSplitPreprocessing, learn

Methods inherited from class com.rapidminer.operator.learner.AbstractLearner

canCalculateWeights, canEstimatePerformance, doWork, doWork, getEstimatedPerformance, getExampleSetInputPort, getOptimizationPerformance, getWeightCalculationError, getWeights, getWeights, onlyWarnForNonSufficientCapabilities, shouldAutoConnect, shouldCalculateWeights, shouldDeliverOptimizationPerformance, shouldEstimatePerformance

Methods inherited from class com.rapidminer.operator.Operator

acceptsInput, addError, addError, addValue, addWarning, apply, apply, assumePreconditionsSatisfied, checkAll, checkAllExcludingMetaData, checkDeprecations, checkForStop, checkIO, checkProperties, clear, clearErrorList, cloneOperator, collectErrors, createExperimentTree, createExperimentTree, createFromXML, createFromXML, createFromXML, createMarkedExperimentTree, createMarkedProcessTree, createProcessTree, createProcessTree, disconnectPorts, execute, fireUpdate, freeMemory, getAddOnlyAdditionalOutput, getApplyCount, getCompatibilityLevel, getDeliveredOutputClasses, getDeprecationInfo, getDesiredInputClasses, getDOMRepresentation, getEncoding, getErrorList, getExecutionUnit, getExperiment, getIncompatibleVersionChanges, getInput, getInput, getInput, getInputClasses, getInputDescription, getInputPorts, getIODescription, getLog, getLogger, getName, getNumberOfBreakpoints, getOperatorClassName, getOperatorDescription, getOutputClasses, getOutputPorts, getParameter, getParameterAsBoolean, getParameterAsChar, getParameterAsColor, getParameterAsDouble, getParameterAsFile, getParameterAsFile, getParameterAsInputStream, getParameterAsInt, getParameterAsMatrix, getParameterAsRepositoryLocation, getParameterAsString, getParameterHandler, getParameterList, getParameters, getParameterTupel, getParameterType, getParent, getPortOwner, getProcess, getResourceConsumptionEstimator, getRoot, getStartTime, getTransformer, getUserDescription, getValue, getValues, getXML, getXML, getXML, hasBreakpoint, hasBreakpoint, hasInput, inApplyLoop, isDebugMode, isDirty, isEnabled, isExpanded, isParallel, isParameterSet, isRunning, log, log, logError, logNote, logWarning, lookupOperator, makeDirty, makeDirtyOnUpdate, notifyRenaming, performAdditionalChecks, preAutoWire, processFinished, processStarts, producesOutput, propagateDirtyness, register, registerOperator, remove, removeAndKeepConnections, rename, resume, setBreakpoint, setCompatibilityLevel, setEnabled, setEnclosingProcess, setExpanded, setInput, setListParameter, setPairParameter, setParameter, setParameters, setUserDescription, shouldAutoConnect, shouldStopStandaloneExecution, toString, transformMetaData, unregisterOperator, updateExecutionOrder, walk, writeXML, writeXML

Methods inherited from class com.rapidminer.tools.AbstractObservable

addObserver, addObserverAsFirst, fireUpdate, removeObserver

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.rapidminer.operator.learner.Learner

getName

Constructor Detail

CHAIDLearner

public CHAIDLearner(OperatorDescription description)

Method Detail

createCriterion

protected Criterion createCriterion(double minimalGain)
                             throws OperatorException

Overrides:

createCriterion in class AbstractTreeLearner

Throws:

OperatorException

calculateBenefit

protected Benefit calculateBenefit(ExampleSet trainingSet,
                                   Attribute attribute)
                            throws OperatorException

This method calculates the benefit of the given attribute. This implementation utilizes the defined Criterion. Subclasses might want to override this method in order to calculate the benefit in other ways.

Throws:

OperatorException

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. ATTENTION! This will create new parameterTypes. For calling already existing parameter types use getParameters().getParameterTypes();

Specified by:

getParameterTypes in interface ParameterHandler

Overrides:

getParameterTypes in class DecisionTreeLearner

supportsCapability

public boolean supportsCapability(OperatorCapability capability)

Description copied from interface: CapabilityProvider

Checks for Learner capabilities. Should return true if the given capability is supported.

Specified by:

supportsCapability in interface CapabilityProvider

Overrides:

supportsCapability in class DecisionTreeLearner