CorrelationWeighting (RapidMiner Class Documentation)

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com.rapidminer.operator.features.weighting
Class CorrelationWeighting

java.lang.Object
  com.rapidminer.operator.Operator
      com.rapidminer.operator.features.weighting.AbstractWeighting
          com.rapidminer.operator.features.weighting.CorrelationWeighting

All Implemented Interfaces:: ConfigurationListener, PreviewListener, ParameterHandler, LoggingHandler

public class CorrelationWeighting
extends AbstractWeighting
extends AbstractWeighting

This class provides a weighting scheme based upon correlation. It calculates the correlation of each attribute with the label attribute and returns the absolute or squared value as its weight. Please keep in mind, that polynomial classes provide no information about their ordering, so that the weights are more or less random, because depending on the internal numerical representation of the classes. Binominal labels work because of the 0-1 coding, as do numerical.

Author:: Sebastian Land

Field Summary
`static java.lang.String`	`PARAMETER_SQUARED_CORRELATION`

Fields inherited from class com.rapidminer.operator.features.weighting.AbstractWeighting
`PARAMETER_NORMALIZE_WEIGHTS`

Constructor Summary
`CorrelationWeighting(OperatorDescription description)`

Method Summary
`AttributeWeights`	`calculateWeights(ExampleSet exampleSet)`
`java.util.List<ParameterType>`	`getParameterTypes()` Returns a list of `ParameterTypes` describing the parameters of this operator.

Methods inherited from class com.rapidminer.operator.features.weighting.AbstractWeighting
`apply, getInputClasses, getOutputClasses`

Methods inherited from class com.rapidminer.operator.Operator
addError, addValue, addWarning, apply, checkDeprecations, checkForStop, checkIO, checkProperties, clearErrorList, cloneOperator, createExperimentTree, createExperimentTree, createFromXML, createMarkedExperimentTree, createMarkedProcessTree, createProcessTree, createProcessTree, getAddOnlyAdditionalOutput, getApplyCount, getDeliveredOutputClasses, getDeprecationInfo, getDesiredInputClasses, getEncoding, getErrorList, getExperiment, getInnerOperatorsXML, getInput, getInput, getInput, getInputDescription, getIOContainerForInApplyLoopBreakpoint, getIODescription, getLog, getName, getOperatorClassName, getOperatorDescription, getParameter, getParameterAsBoolean, getParameterAsColor, getParameterAsDouble, getParameterAsFile, getParameterAsFile, getParameterAsInputStream, getParameterAsInt, getParameterAsMatrix, getParameterAsString, getParameterList, getParameters, getParameterType, getParent, getProcess, getStartTime, getStatus, getUserDescription, getValue, getValues, getXML, hasBreakpoint, hasBreakpoint, hasInput, inApplyLoop, isDebugMode, isEnabled, isExpanded, isParallel, isParameterSet, log, logError, logNote, logWarning, performAdditionalChecks, processFinished, processStarts, register, registerOperator, remove, rename, resume, setApplyCount, setBreakpoint, setEnabled, setExpanded, setInput, setListParameter, setOperatorParameters, setParameter, setParameters, setParent, setUserDescription, toString, unregisterOperator, writeXML

Methods inherited from class com.rapidminer.operator.Operator

addError, addValue, addWarning, apply, checkDeprecations, checkForStop, checkIO, checkProperties, clearErrorList, cloneOperator, createExperimentTree, createExperimentTree, createFromXML, createMarkedExperimentTree, createMarkedProcessTree, createProcessTree, createProcessTree, getAddOnlyAdditionalOutput, getApplyCount, getDeliveredOutputClasses, getDeprecationInfo, getDesiredInputClasses, getEncoding, getErrorList, getExperiment, getInnerOperatorsXML, getInput, getInput, getInput, getInputDescription, getIOContainerForInApplyLoopBreakpoint, getIODescription, getLog, getName, getOperatorClassName, getOperatorDescription, getParameter, getParameterAsBoolean, getParameterAsColor, getParameterAsDouble, getParameterAsFile, getParameterAsFile, getParameterAsInputStream, getParameterAsInt, getParameterAsMatrix, getParameterAsString, getParameterList, getParameters, getParameterType, getParent, getProcess, getStartTime, getStatus, getUserDescription, getValue, getValues, getXML, hasBreakpoint, hasBreakpoint, hasInput, inApplyLoop, isDebugMode, isEnabled, isExpanded, isParallel, isParameterSet, log, logError, logNote, logWarning, performAdditionalChecks, processFinished, processStarts, register, registerOperator, remove, rename, resume, setApplyCount, setBreakpoint, setEnabled, setExpanded, setInput, setListParameter, setOperatorParameters, setParameter, setParameters, setParent, setUserDescription, toString, unregisterOperator, writeXML

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

Field Detail

PARAMETER_SQUARED_CORRELATION

public static final java.lang.String PARAMETER_SQUARED_CORRELATION

See Also:: Constant Field Values

Constructor Detail

CorrelationWeighting

public CorrelationWeighting(OperatorDescription description)

Parameters:: description -

Method Detail

calculateWeights

public AttributeWeights calculateWeights(ExampleSet exampleSet)
                                  throws OperatorException

Specified by:: calculateWeights in class AbstractWeighting

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.