ai.libs.jaicore.ml.metafeatures

Class GlobalCharacterizer

java.lang.Object

org.openml.webapplication.fantail.dc.Characterizer

ai.libs.jaicore.ml.metafeatures.GlobalCharacterizer

Direct Known Subclasses:

NoProbingCharacterizer

public class GlobalCharacterizer
extends org.openml.webapplication.fantail.dc.Characterizer

Characterizer that applies a number of Characterizers to a data set. Uses probing. Adapted from GlobalMetafeatures.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<org.openml.webapplication.fantail.dc.Characterizer,java.lang.String>	characterizerNames The names of the characterizers used
protected java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer>	characterizers The list of characterizers used in the computation of meta features
protected java.util.Map<java.lang.String,java.lang.Double>	computationTimes The time it took to compute the meta features for each characterizer by name
protected java.lang.String[]	ids The names of all the meta features that are computed by this characterizer

Constructor Summary

Constructors

Constructor and Description
GlobalCharacterizer() Initializes a new characterizer.

Method Summary

Modifier and Type	Method and Description
java.util.Map<java.lang.String,java.lang.Double>	characterize(weka.core.Instances instances)
java.util.Map<java.lang.String,java.util.List<java.lang.String>>	getCharacterizerGroups() Gets the mapping of a Characterizer to the meta features it computes.
java.util.List<java.lang.String>	getCharacterizerNames() Gets the names of the used Characterizers.
java.util.Map<org.openml.webapplication.fantail.dc.Characterizer,java.lang.String>	getCharacterizerNamesMappings() Gets names for the used Characterizers.
java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer>	getCharacterizers() Gets the list of characterizers used in the computation of meta features.
java.lang.String[]	getIDs()
java.util.Map<java.lang.String,java.lang.Double>	getMetaFeatureComputationTimes() Gets the time in milliseconds it took to compute each group of meta features (Computed by a Characterizer).
protected void	initializeCharacterizerNames() Initializes characterizerNames.
protected void	initializeCharacterizers() Adds the required characterizers to characterizers.
protected void	initializeMetaFeatureIds() Initializes ids.
java.lang.String	toString()

Methods inherited from class org.openml.webapplication.fantail.dc.Characterizer

getNumMetaFeatures

Methods inherited from class java.lang.Object

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

Field Detail

ids

protected java.lang.String[] ids

The names of all the meta features that are computed by this characterizer

characterizers

protected java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer> characterizers

The list of characterizers used in the computation of meta features

characterizerNames

protected java.util.Map<org.openml.webapplication.fantail.dc.Characterizer,java.lang.String> characterizerNames

The names of the characterizers used

computationTimes

protected java.util.Map<java.lang.String,java.lang.Double> computationTimes

The time it took to compute the meta features for each characterizer by name

Constructor Detail

GlobalCharacterizer

public GlobalCharacterizer()
                    throws java.lang.Exception

Initializes a new characterizer. Calls initializeCharacterizers(), initializeCharacterizerNames() and initializeMetaFeatureIds() in order.

Throws:

java.lang.Exception

Method Detail

characterize

public java.util.Map<java.lang.String,java.lang.Double> characterize(weka.core.Instances instances)

Specified by:

characterize in class org.openml.webapplication.fantail.dc.Characterizer

toString

public java.lang.String toString()

Overrides:

toString in class org.openml.webapplication.fantail.dc.Characterizer

getCharacterizers

public java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer> getCharacterizers()

Gets the list of characterizers used in the computation of meta features.

Returns:

The characterizers

getMetaFeatureComputationTimes

public java.util.Map<java.lang.String,java.lang.Double> getMetaFeatureComputationTimes()

Gets the time in milliseconds it took to compute each group of meta features (Computed by a Characterizer). The computation times for the last time that characterize(Instances) was called are returned. The time is NaN if the meta feature could not be computed.

Returns:

The meta feature computation times

getCharacterizerNames

public java.util.List<java.lang.String> getCharacterizerNames()

Gets the names of the used Characterizers.

Returns:

The names of the characterizers

getCharacterizerNamesMappings

public java.util.Map<org.openml.webapplication.fantail.dc.Characterizer,java.lang.String> getCharacterizerNamesMappings()

Gets names for the used Characterizers.

Returns:

The used Characterizers mapped to their names

getCharacterizerGroups

public java.util.Map<java.lang.String,java.util.List<java.lang.String>> getCharacterizerGroups()

Gets the mapping of a Characterizer to the meta features it computes.

Returns:

The mapping of Characterizer names to their meta features

getIDs

public java.lang.String[] getIDs()

Specified by:

getIDs in class org.openml.webapplication.fantail.dc.Characterizer

initializeCharacterizers

protected void initializeCharacterizers()
                                 throws java.lang.Exception

Adds the required characterizers to characterizers.

Throws:

java.lang.Exception

initializeCharacterizerNames

protected void initializeCharacterizerNames()

Initializes characterizerNames.

initializeMetaFeatureIds

protected void initializeMetaFeatureIds()

Initializes ids.