Package moa.tasks.meta

Class ALPartitionEvaluationTask

java.lang.Object

moa.AbstractMOAObject

moa.options.AbstractOptionHandler

moa.tasks.AbstractTask

moa.tasks.MainTask

moa.tasks.meta.MetaMainTask

moa.tasks.meta.ALMainTask

moa.tasks.meta.ALPartitionEvaluationTask

All Implemented Interfaces:

Configurable, java.io.Serializable, MOAObject, OptionHandler, Task

public class ALPartitionEvaluationTask
extends ALMainTask

This task extensively evaluates an active learning classifier on a stream. First, the given data set is partitioned into subsets, each leaving out a different part of the overall data. On each subset, the ALMultiParamTask is performed which individually evaluates the active learning classifier for each element of a set of parameter values. The individual evaluation is done by prequential evaluation (testing, then training with each example in sequence).

Version:

$Revision: 1 $

Author:

Cornelius Styp von Rekowski ([email protected])

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
ClassOption	multiParamTaskOption
IntOption	numPartitionsOption
IntOption	randomSeedOption

Fields inherited from class moa.options.AbstractOptionHandler

config

Fields inherited from class moa.tasks.MainTask

INSTANCES_BETWEEN_MONITOR_UPDATES, outputFileOption

Fields inherited from class moa.tasks.meta.MetaMainTask

colorCoding, isLastSubtaskOnLevel, nameSuffix

Constructor Summary

Constructors

Constructor	Description
ALPartitionEvaluationTask()

Method Summary

Modifier and Type	Method	Description
protected java.lang.Object	doMainTask(TaskMonitor monitor, ObjectRepository repository)	This method performs this task.
java.lang.String	getPurposeString()	Dictionary with option texts and objects
java.util.List<ALTaskThread>	getSubtaskThreads()	Get the list of threads for all subtasks and recursively the children's subtasks.
java.lang.Class<?>	getTaskResultType()	Gets the result type of this task.
protected void	prepareForUseImpl(TaskMonitor monitor, ObjectRepository repository)	This method describes the implementation of how to prepare this object for use.

Methods inherited from class moa.AbstractMOAObject

copy, measureByteSize, measureByteSize, toString

Methods inherited from class moa.options.AbstractOptionHandler

copy, getCLICreationString, getOptions, getPreparedClassOption, prepareClassOptions, prepareForUse, prepareForUse

Methods inherited from class moa.tasks.AbstractTask

doTask, doTask, getDescription, getTaskName

Methods inherited from class moa.tasks.MainTask

doTaskImpl

Methods inherited from class moa.tasks.meta.MetaMainTask

getColorCoding, getDisplayName, getSubtaskLevel, isSubtask, setColorCoding, setIsLastSubtaskOnLevel, setNameSuffix

Methods inherited from interface moa.MOAObject

copy, measureByteSize

Methods inherited from class java.lang.Object

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

Field Detail

multiParamTaskOption

public ClassOption multiParamTaskOption

numPartitionsOption

public IntOption numPartitionsOption

randomSeedOption

public IntOption randomSeedOption

Constructor Detail

ALPartitionEvaluationTask

public ALPartitionEvaluationTask()

Method Detail

getPurposeString

public java.lang.String getPurposeString()

Description copied from class: AbstractOptionHandler

Dictionary with option texts and objects

Specified by:

getPurposeString in interface OptionHandler

Overrides:

getPurposeString in class AbstractOptionHandler

Returns:

the string with the purpose of this object

prepareForUseImpl

protected void prepareForUseImpl(TaskMonitor monitor,
                                 ObjectRepository repository)

Description copied from class: AbstractOptionHandler

This method describes the implementation of how to prepare this object for use. All classes that extends this class have to implement prepareForUseImpl and not prepareForUse since prepareForUse calls prepareForUseImpl.

Overrides:

prepareForUseImpl in class AbstractTask

Parameters:

monitor - the TaskMonitor to use

repository - the ObjectRepository to use

getTaskResultType

public java.lang.Class<?> getTaskResultType()

Description copied from interface: Task

Gets the result type of this task. Tasks can return LearningCurve, LearningEvaluation, Classifier, String, Instances..

Returns:

a class object of the result of this task

doMainTask

protected java.lang.Object doMainTask(TaskMonitor monitor,
                                      ObjectRepository repository)

Description copied from class: MainTask

This method performs this task. AbstractTask implements doTask, that uses doTaskImpl. MainTask implements doTaskImpl using doMainTask so its extensions only need to implement doMainTask.

Specified by:

doMainTask in class MainTask

Parameters:

monitor - the TaskMonitor to use

repository - the ObjectRepository to use

Returns:

an object with the result of this task

getSubtaskThreads

public java.util.List<ALTaskThread> getSubtaskThreads()

Description copied from class: MetaMainTask

Get the list of threads for all subtasks and recursively the children's subtasks.

Specified by:

getSubtaskThreads in class ALMainTask

Returns:

list of subtask threads, recursively generated