edu.udo.cs.yale.operator.meta
Class QuadraticParameterOptimizationOperator

java.lang.Object
  edu.udo.cs.yale.operator.Operator
      edu.udo.cs.yale.operator.OperatorChain
          edu.udo.cs.yale.operator.meta.ParameterOptimizationOperator
              edu.udo.cs.yale.operator.meta.GridSearchParameterOptimizationOperator
                  edu.udo.cs.yale.operator.meta.QuadraticParameterOptimizationOperator

All Implemented Interfaces:

ConfigurationListener

public class QuadraticParameterOptimizationOperator
extends GridSearchParameterOptimizationOperator

This operator finds the optimal values for a set of parameters using a quadratic interaction model. The parameter parameters is a list of key value pairs where the keys are of the form OperatorName.parameter_name and the value is a comma separated list of values (as for the GridParameterOptimization operator).
The operator returns an optimal ParameterSet which can as well be written to a file with a ParameterSetLoader. This parameter set can be read in another experiment using an ParameterSetLoader.
The file format of the parameter set file is straightforward and can also easily be generated by external applications. Each line is of the form

operator_name.parameter_name = value.

Version:

$Id: QuadraticParameterOptimizationOperator.java,v 1.11 2006/04/05 08:57:26 ingomierswa Exp $

Author:

Stefan Rueping, Helge Homburg

Field Summary

private ParameterSet	best
private static int	CLIP
private static java.lang.String[]	EXCEED_BEHAVIORS
private static int	FAIL
private static int	IGNORE

Fields inherited from class edu.udo.cs.yale.operator.meta.GridSearchParameterOptimizationOperator

currentIndex, numberOfCombinations, operators, parameterList, parameters, values

Constructor Summary

QuadraticParameterOptimizationOperator(OperatorDescription description)

Method Summary

IOObject[]	apply() Applies all inner operators.
double	getCurrentBestPerformance()
int	getNumberOfSteps() Returns the number of steps performed by this chain.
java.util.List<ParameterType>	getParameterTypes() Returns a list of ParameterTypes describing the parameters of this operator.

Methods inherited from class edu.udo.cs.yale.operator.meta.GridSearchParameterOptimizationOperator

getParametersToOptimize

Methods inherited from class edu.udo.cs.yale.operator.meta.ParameterOptimizationOperator

getInnerOperatorCondition, getInputClasses, getMaxNumberOfInnerOperators, getMinNumberOfInnerOperators, getOutputClasses, getPerformance

Methods inherited from class edu.udo.cs.yale.operator.OperatorChain

addAddListener, addOperator, addOperator, checkDeprecations, checkIO, checkNumberOfInnerOperators, checkProperties, clearErrorList, clearStepCounter, cloneOperator, countStep, createExperimentTree, delete, experimentFinished, experimentStarts, getAllInnerOperators, getCurrentStep, getIndexOfOperator, getInnerOperatorForName, getInnerOperatorsXML, getNumberOfAllOperators, getNumberOfChildrensSteps, getNumberOfOperators, getOperator, getOperatorFromAll, getOperators, isEnabled, performAdditionalChecks, removeAddListener, removeOperator, setEnabled, setExperiment, shouldReturnInnerOutput

Methods inherited from class edu.udo.cs.yale.operator.Operator

addError, addValue, addWarning, apply, createExperimentTree, createFromXML, createMarkedExperimentTree, getAddOnlyAdditionalOutput, getApplyCount, getDeliveredOutputClasses, getDeprecationInfo, getDesiredInputClasses, getErrorList, getExperiment, getInput, getInput, getInput, getInputDescription, getIOContainerForInApplyLoopBreakpoint, getName, getOperatorClassName, getOperatorDescription, getParameter, getParameterAsBoolean, getParameterAsColor, getParameterAsDouble, getParameterAsFile, getParameterAsInt, getParameterAsString, getParameterList, getParameters, getParameterType, getParent, getStartTime, getStatus, getUserDescription, getValue, getValues, getXML, hasBreakpoint, hasBreakpoint, hasInput, inApplyLoop, isParameterSet, logMessage, register, remove, rename, resume, setBreakpoint, 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

Field Detail

EXCEED_BEHAVIORS

private static final java.lang.String[] EXCEED_BEHAVIORS

IGNORE

private static final int IGNORE

See Also:

Constant Field Values

CLIP

private static final int CLIP

See Also:

Constant Field Values

FAIL

private static final int FAIL

See Also:

Constant Field Values

best

private ParameterSet best

Constructor Detail

QuadraticParameterOptimizationOperator

public QuadraticParameterOptimizationOperator(OperatorDescription description)

Method Detail

getCurrentBestPerformance

public double getCurrentBestPerformance()

Overrides:

getCurrentBestPerformance in class GridSearchParameterOptimizationOperator

apply

public IOObject[] apply()
                 throws OperatorException

Description copied from class: OperatorChain

Applies all inner operators. The input to this operator becomes the input of the first inner operator. The latter's output is passed to the second inner operator and so on. Note to subclassers: If subclasses (for example wrappers) want to make use of this method remember to call exactly this method (super.apply()) and do not call super.apply(IOContainer) erroneously which will result in an infinite loop. Subclasses who override this method without invoking super.apply() should at least invoke the method OperatorChain.clearStepCounter().

Overrides:

apply in class GridSearchParameterOptimizationOperator

Returns:

the last inner operator's output or the input itself if the chain is empty.

Throws:

OperatorException

getNumberOfSteps

public int getNumberOfSteps()

Description copied from class: OperatorChain

Returns the number of steps performed by this chain.

Overrides:

getNumberOfSteps in class ParameterOptimizationOperator

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.

Overrides:

getParameterTypes in class ParameterOptimizationOperator