com.rapidminer.operator.preprocessing.transformation
Class GroupedANOVAOperator

java.lang.Object
  com.rapidminer.operator.Operator
      com.rapidminer.operator.preprocessing.transformation.GroupedANOVAOperator

All Implemented Interfaces:

ConfigurationListener, PreviewListener, ParameterHandler, LoggingHandler

public class GroupedANOVAOperator
extends Operator

This operator creates groups of the input example set based on the defined grouping attribute. For each of the groups the mean and variance of another attribute (the anova attribute) is calculated and an ANalysis Of VAriance (ANOVA) is performed. The result will be a significance test result for the specified significance level indicating if the values for the attribute are significantly different between the groups defined by the grouping attribute.

Author:

Ingo Mierswa

Field Summary

static java.lang.String	PARAMETER_ANOVA_ATTRIBUTE
static java.lang.String	PARAMETER_GROUP_BY_ATTRIBUTE
static java.lang.String	PARAMETER_ONLY_DISTINCT
static java.lang.String	PARAMETER_SIGNIFICANCE_LEVEL

Constructor Summary

GroupedANOVAOperator(OperatorDescription desc)

Method Summary

IOObject[]	apply() Implement this method in subclasses.
java.lang.Class<?>[]	getInputClasses() Returns the classes that are needed as input.
InputDescription	getInputDescription(java.lang.Class cls) Indicates that the consumption of example sets can be user defined (default: no consumption).
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.

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, 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_ANOVA_ATTRIBUTE

public static final java.lang.String PARAMETER_ANOVA_ATTRIBUTE

See Also:

Constant Field Values

PARAMETER_GROUP_BY_ATTRIBUTE

public static final java.lang.String PARAMETER_GROUP_BY_ATTRIBUTE

See Also:

Constant Field Values

PARAMETER_SIGNIFICANCE_LEVEL

public static final java.lang.String PARAMETER_SIGNIFICANCE_LEVEL

See Also:

Constant Field Values

PARAMETER_ONLY_DISTINCT

public static final java.lang.String PARAMETER_ONLY_DISTINCT

See Also:

Constant Field Values

Constructor Detail

GroupedANOVAOperator

public GroupedANOVAOperator(OperatorDescription desc)

Method Detail

apply

public IOObject[] apply()
                 throws OperatorException

Description copied from class: Operator

Implement this method in subclasses.

Specified by:

apply in class Operator

Throws:

OperatorException

getInputDescription

public InputDescription getInputDescription(java.lang.Class cls)

Indicates that the consumption of example sets can be user defined (default: no consumption).

Overrides:

getInputDescription in class Operator

getInputClasses

public java.lang.Class<?>[] getInputClasses()

Description copied from class: Operator

Returns the classes that are needed as input. May be null or an empty (no desired input). As default, all delivered input objects are consumed and must be also delivered as output in both Operator.getOutputClasses() and Operator.apply() if this is necessary. This default behavior can be changed by overriding Operator.getInputDescription(Class). Subclasses which implement this method should not make use of parameters since this method is invoked by getParameterTypes(). Therefore, parameters are not fully available at this point of time and this might lead to exceptions. Please use InputDescriptions instead.

Specified by:

getInputClasses in class Operator

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 objects which should not be consumed must also be defined by this method (e.g. an example set which is changed but not consumed in the case of a preprocessing operator must be defined in both, the methods Operator.getInputClasses() and Operator.getOutputClasses()). 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 (defined by changing the implementation in Operator.getInputDescription(Class)) must not be defined as additional output in this method.

May deliver null or an empy array (no additional output is produced or guaranteed). Must return the class array of delivered output objects otherwise.

Specified by:

getOutputClasses in class Operator

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