Package moa.streams
Class ConceptDriftStream
- java.lang.Object
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- moa.AbstractMOAObject
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- moa.options.AbstractOptionHandler
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- moa.streams.ConceptDriftStream
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- All Implemented Interfaces:
Configurable
,Serializable
,CapabilitiesHandler
,MOAObject
,OptionHandler
,ExampleStream<Example<Instance>>
,InstanceStream
- Direct Known Subclasses:
RecurrentConceptDriftStream
public class ConceptDriftStream extends AbstractOptionHandler implements InstanceStream, CapabilitiesHandler
Stream generator that adds concept drift to examples in a stream.
Example:
ConceptDriftStream -s (generators.AgrawalGenerator -f 7)
-d (generators.AgrawalGenerator -f 2) -w 1000000 -p 900000
s : Stream
d : Concept drift Stream
p : Central position of concept drift change
w : Width of concept drift change- Version:
- $Revision: 7 $
- Author:
- Albert Bifet (abifet at cs dot waikato dot ac dot nz)
- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description FloatOption
alphaOption
protected ExampleStream
driftStream
ClassOption
driftstreamOption
protected ExampleStream
inputStream
protected int
numberInstanceStream
IntOption
positionOption
protected Random
random
IntOption
randomSeedOption
ClassOption
streamOption
IntOption
widthOption
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Fields inherited from class moa.options.AbstractOptionHandler
config
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Constructor Summary
Constructors Constructor Description ConceptDriftStream()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description ImmutableCapabilities
defineImmutableCapabilities()
Defines the set of capabilities the object has.long
estimatedRemainingInstances()
Gets the estimated number of remaining instances in this streamvoid
getDescription(StringBuilder sb, int indent)
Returns a string representation of this object.InstancesHeader
getHeader()
Gets the header of this stream.String
getPurposeString()
Dictionary with option texts and objectsboolean
hasMoreInstances()
Gets whether this stream has more instances to output.boolean
isRestartable()
Gets whether this stream can restart.Example
nextInstance()
Gets the next example from this stream.void
prepareForUseImpl(TaskMonitor monitor, ObjectRepository repository)
This method describes the implementation of how to prepare this object for use.void
restart()
Restarts this stream.-
Methods inherited from class moa.options.AbstractOptionHandler
copy, getCLICreationString, getOptions, getPreparedClassOption, prepareClassOptions, prepareForUse, prepareForUse
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Methods inherited from class moa.AbstractMOAObject
copy, measureByteSize, measureByteSize, toString
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface moa.capabilities.CapabilitiesHandler
getCapabilities
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Methods inherited from interface moa.MOAObject
measureByteSize
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Field Detail
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streamOption
public ClassOption streamOption
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driftstreamOption
public ClassOption driftstreamOption
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alphaOption
public FloatOption alphaOption
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positionOption
public IntOption positionOption
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widthOption
public IntOption widthOption
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randomSeedOption
public IntOption randomSeedOption
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inputStream
protected ExampleStream inputStream
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driftStream
protected ExampleStream driftStream
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random
protected Random random
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numberInstanceStream
protected int numberInstanceStream
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Method Detail
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getPurposeString
public String getPurposeString()
Description copied from class:AbstractOptionHandler
Dictionary with option texts and objects- Specified by:
getPurposeString
in interfaceOptionHandler
- Overrides:
getPurposeString
in classAbstractOptionHandler
- Returns:
- the string with the purpose of this object
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prepareForUseImpl
public 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 implementprepareForUseImpl
and notprepareForUse
sinceprepareForUse
callsprepareForUseImpl
.- Specified by:
prepareForUseImpl
in classAbstractOptionHandler
- Parameters:
monitor
- the TaskMonitor to userepository
- the ObjectRepository to use
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estimatedRemainingInstances
public long estimatedRemainingInstances()
Description copied from interface:ExampleStream
Gets the estimated number of remaining instances in this stream- Specified by:
estimatedRemainingInstances
in interfaceExampleStream<Example<Instance>>
- Returns:
- the estimated number of instances to get from this stream
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getHeader
public InstancesHeader getHeader()
Description copied from interface:ExampleStream
Gets the header of this stream. This is useful to know attributes and classes. InstancesHeader is an extension of weka.Instances.- Specified by:
getHeader
in interfaceExampleStream<Example<Instance>>
- Returns:
- the header of this stream
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hasMoreInstances
public boolean hasMoreInstances()
Description copied from interface:ExampleStream
Gets whether this stream has more instances to output. This is useful when reading streams from files.- Specified by:
hasMoreInstances
in interfaceExampleStream<Example<Instance>>
- Returns:
- true if this stream has more instances to output
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isRestartable
public boolean isRestartable()
Description copied from interface:ExampleStream
Gets whether this stream can restart.- Specified by:
isRestartable
in interfaceExampleStream<Example<Instance>>
- Returns:
- true if this stream can restart
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nextInstance
public Example nextInstance()
Description copied from interface:ExampleStream
Gets the next example from this stream.- Specified by:
nextInstance
in interfaceExampleStream<Example<Instance>>
- Returns:
- the next example of this stream
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restart
public void restart()
Description copied from interface:ExampleStream
Restarts this stream. It must be similar to starting a new stream from scratch.- Specified by:
restart
in interfaceExampleStream<Example<Instance>>
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getDescription
public void getDescription(StringBuilder sb, int indent)
Description copied from interface:MOAObject
Returns a string representation of this object. Used inAbstractMOAObject.toString
to give a string representation of the object.- Specified by:
getDescription
in interfaceMOAObject
- Parameters:
sb
- the stringbuilder to add the descriptionindent
- the number of characters to indent
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defineImmutableCapabilities
public ImmutableCapabilities defineImmutableCapabilities()
Description copied from interface:CapabilitiesHandler
Defines the set of capabilities the object has. Should be overridden if the object's capabilities do not change.- Specified by:
defineImmutableCapabilities
in interfaceCapabilitiesHandler
- Specified by:
defineImmutableCapabilities
in interfaceExampleStream<Example<Instance>>
- Returns:
- The capabilities of the object.
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