com.rapidminer.operator.features.selection
Class RemoveUselessFeatures

java.lang.Object
  com.rapidminer.operator.Operator
      com.rapidminer.operator.AbstractExampleSetProcessing
          com.rapidminer.operator.features.AbstractFeatureProcessing
              com.rapidminer.operator.features.selection.AbstractFeatureSelection
                  com.rapidminer.operator.features.selection.RemoveUselessFeatures

All Implemented Interfaces:

ConfigurationListener, PreviewListener, ParameterHandler, LoggingHandler

public class RemoveUselessFeatures
extends AbstractFeatureSelection

Removes useless attribute from the example set. Useless attributes are

• nominal attributes which has the same value for more than p percent of all examples.
• numerical attributes which standard deviation is less or equal to a given deviation threshold t.

Author:

Ingo Mierswa ingomierswa Exp $

Field Summary

static java.lang.String	PARAMETER_NOMINAL_SINGLE_VALUE_LOWER The parameter name for "Removes all nominal attributes which provides less than the given amount of at least one value (-1: remove attributes with values occuring only once).
static java.lang.String	PARAMETER_NOMINAL_SINGLE_VALUE_UPPER The parameter name for "Removes all nominal attributes which provides more than the given amount of only one value.
static java.lang.String	PARAMETER_NUMERICAL_MIN_DEVIATION The parameter name for "Removes all numerical attributes with standard deviation less or equal to this threshold.

Constructor Summary

RemoveUselessFeatures(OperatorDescription description)

Method Summary

ExampleSet	apply(ExampleSet exampleSet) Delegate for the apply method.
java.util.List<ParameterType>	getParameterTypes() Returns a list of ParameterTypes describing the parameters of this operator.

Methods inherited from class com.rapidminer.operator.AbstractExampleSetProcessing

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 java.lang.Object

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

Field Detail

PARAMETER_NUMERICAL_MIN_DEVIATION

public static final java.lang.String PARAMETER_NUMERICAL_MIN_DEVIATION

The parameter name for "Removes all numerical attributes with standard deviation less or equal to this threshold."

See Also:

Constant Field Values

PARAMETER_NOMINAL_SINGLE_VALUE_UPPER

public static final java.lang.String PARAMETER_NOMINAL_SINGLE_VALUE_UPPER

The parameter name for "Removes all nominal attributes which provides more than the given amount of only one value."

See Also:

Constant Field Values

PARAMETER_NOMINAL_SINGLE_VALUE_LOWER

public static final java.lang.String PARAMETER_NOMINAL_SINGLE_VALUE_LOWER

The parameter name for "Removes all nominal attributes which provides less than the given amount of at least one value (-1: remove attributes with values occuring only once)."

See Also:

Constant Field Values

Constructor Detail

RemoveUselessFeatures

public RemoveUselessFeatures(OperatorDescription description)

Method Detail

apply

public ExampleSet apply(ExampleSet exampleSet)
                 throws OperatorException

Description copied from class: AbstractExampleSetProcessing

Delegate for the apply method. In most cases, the returned example set will be the same as the example set or a modified clone.

Specified by:

apply in class AbstractExampleSetProcessing

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.

Specified by:

getParameterTypes in interface ParameterHandler

Overrides:

getParameterTypes in class Operator