com.rapidminer.operator.learner.meta
Class MetaCost

java.lang.Object
  com.rapidminer.operator.Operator
      com.rapidminer.operator.OperatorChain
          com.rapidminer.operator.learner.meta.AbstractMetaLearner
              com.rapidminer.operator.learner.meta.MetaCost

All Implemented Interfaces:

ConfigurationListener, PreviewListener, Learner, ParameterHandler, LoggingHandler

public class MetaCost
extends AbstractMetaLearner

This operator uses a given cost matrix to compute label predictions according to classification costs. The method used by this operator is similar to MetaCost as described by Pedro Domingos.

Author:

Helge Homburg

Field Summary

static java.lang.String	PARAMETER_COST_MATRIX The parameter name for "The cost matrix in Matlab single line format"
static java.lang.String	PARAMETER_COST_MATRIX_FILE_LOCATION The parameter name for "File"
static java.lang.String	PARAMETER_ITERATIONS The parameter name for "The number of iterations (base models).
static java.lang.String	PARAMETER_LOCAL_RANDOM_SEED The parameter name for "Use the given random seed instead of global random numbers (-1: use global)"
static java.lang.String	PARAMETER_SAMPLING_WITH_REPLACEMENT The parameter name for "Use sampling with replacement (true) or without (false)"
static java.lang.String	PARAMETER_USE_SUBSET_FOR_TRAINING The parameter name for "Fraction of examples used for training.

Constructor Summary

MetaCost(OperatorDescription description)

Method Summary

java.util.List<ParameterType>	getParameterTypes() Returns a list of ParameterTypes describing the parameters of this operator.
Model	learn(ExampleSet inputSet) Trains a model.
boolean	supportsCapability(LearnerCapability capability) Support polynominal labels.

Methods inherited from class com.rapidminer.operator.learner.meta.AbstractMetaLearner

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

Methods inherited from class com.rapidminer.operator.OperatorChain

addAddListener, addOperator, addOperator, checkDeprecations, checkIO, checkNumberOfInnerOperators, checkProperties, clearErrorList, cloneOperator, createExperimentTree, createProcessTree, getAllInnerOperators, getIndexOfOperator, getInnerOperatorForName, getInnerOperatorsXML, getNumberOfAllOperators, getNumberOfOperators, getOperator, getOperatorFromAll, getOperators, performAdditionalChecks, processFinished, processStarts, registerOperator, removeAddListener, removeOperator, shouldAddNonConsumedInput, shouldReturnInnerOutput, unregisterOperator

Methods inherited from class com.rapidminer.operator.Operator

addError, addValue, addWarning, apply, checkForStop, createExperimentTree, createFromXML, createMarkedExperimentTree, createMarkedProcessTree, createProcessTree, getAddOnlyAdditionalOutput, getApplyCount, getDeliveredOutputClasses, getDeprecationInfo, getDesiredInputClasses, getEncoding, getErrorList, getExperiment, 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, register, remove, rename, resume, setApplyCount, setBreakpoint, setEnabled, setExpanded, 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 com.rapidminer.operator.learner.Learner

getName

Field Detail

PARAMETER_COST_MATRIX

public static final java.lang.String PARAMETER_COST_MATRIX

The parameter name for "The cost matrix in Matlab single line format"

See Also:

Constant Field Values

PARAMETER_COST_MATRIX_FILE_LOCATION

public static final java.lang.String PARAMETER_COST_MATRIX_FILE_LOCATION

The parameter name for "File"

See Also:

Constant Field Values

PARAMETER_USE_SUBSET_FOR_TRAINING

public static final java.lang.String PARAMETER_USE_SUBSET_FOR_TRAINING

The parameter name for "Fraction of examples used for training. Must be greater than 0 and should be lower than 1."

See Also:

Constant Field Values

PARAMETER_ITERATIONS

public static final java.lang.String PARAMETER_ITERATIONS

The parameter name for "The number of iterations (base models)."

See Also:

Constant Field Values

PARAMETER_SAMPLING_WITH_REPLACEMENT

public static final java.lang.String PARAMETER_SAMPLING_WITH_REPLACEMENT

The parameter name for "Use sampling with replacement (true) or without (false)"

See Also:

Constant Field Values

PARAMETER_LOCAL_RANDOM_SEED

public static final java.lang.String PARAMETER_LOCAL_RANDOM_SEED

The parameter name for "Use the given random seed instead of global random numbers (-1: use global)"

See Also:

Constant Field Values

Constructor Detail

MetaCost

public MetaCost(OperatorDescription description)

Method Detail

learn

public Model learn(ExampleSet inputSet)
            throws OperatorException

Description copied from interface: Learner

Trains a model. This method should be called by apply() and is implemented by subclasses.

Throws:

OperatorException

supportsCapability

public boolean supportsCapability(LearnerCapability capability)

Support polynominal labels. For all other capabilities, it checks for the underlying operator to see which capabilities are supported by them.

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.

Specified by:

getParameterTypes in interface ParameterHandler

Overrides:

getParameterTypes in class Operator