de.lmu.ifi.dbs.elki.datasource.filter.transform

Class NumberVectorFeatureSelectionFilter<V extends NumberVector>

java.lang.Object

de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamConversionFilter<I,O>

de.lmu.ifi.dbs.elki.datasource.filter.AbstractVectorStreamConversionFilter<V,V>

de.lmu.ifi.dbs.elki.datasource.filter.transform.NumberVectorFeatureSelectionFilter<V>

Type Parameters:

V - Vector type

All Implemented Interfaces:

BundleStreamSource, ObjectFilter, StreamFilter

public class NumberVectorFeatureSelectionFilter<V extends NumberVector>
extends AbstractVectorStreamConversionFilter<V,V>

Parser to project the ParsingResult obtained by a suitable base parser onto a selected subset of attributes.

Since:

0.4.0

Author:

Arthur Zimek

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	NumberVectorFeatureSelectionFilter.Parameterizer Parameterization class.

Nested classes/interfaces inherited from interface de.lmu.ifi.dbs.elki.datasource.bundle.BundleStreamSource

BundleStreamSource.Event

Field Summary

Fields

Modifier and Type	Field and Description
private long[]	selectedAttributes Keeps the selection of the subspace to project onto.

Fields inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractVectorStreamConversionFilter

factory

Fields inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

source

Constructor Summary

Constructors

Constructor and Description
NumberVectorFeatureSelectionFilter(long[] selectedAttributes) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected SimpleTypeInformation<? super V>	convertedType(SimpleTypeInformation<V> in) Get the output type from the input type after conversion.
protected V	filterSingleObject(V obj) Normalize a single instance.
int	getDimensionality() Get the resulting dimensionality.
protected SimpleTypeInformation<? super V>	getInputTypeRestriction() Get the input type restriction used for negotiating the data query.
long[]	getSelectedAttributes() Provides a BitSet with the bits set to true corresponding to the selected attributes in NumberVectorFeatureSelectionFilter.Parameterizer.SELECTED_ATTRIBUTES_ID.
void	setSelectedAttributes(long[] selectedAttributes) Sets the bits set to true in the given BitSet as selected attributes in NumberVectorFeatureSelectionFilter.Parameterizer.SELECTED_ATTRIBUTES_ID.

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractVectorStreamConversionFilter

initializeOutputType

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamConversionFilter

data, getMeta, nextEvent

Methods inherited from class de.lmu.ifi.dbs.elki.datasource.filter.AbstractStreamFilter

asMultipleObjectsBundle, assignDBID, filter, hasDBIDs, init

Methods inherited from class java.lang.Object

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

Field Detail

selectedAttributes

private long[] selectedAttributes

Keeps the selection of the subspace to project onto.

Constructor Detail

NumberVectorFeatureSelectionFilter

public NumberVectorFeatureSelectionFilter(long[] selectedAttributes)

Constructor.

Parameters:

selectedAttributes - Selected attributes

Method Detail

filterSingleObject

protected V filterSingleObject(V obj)

Description copied from class: AbstractStreamConversionFilter

Normalize a single instance. You can implement this as UnsupportedOperationException if you override both public "normalize" functions!

Specified by:

filterSingleObject in class AbstractStreamConversionFilter<V extends NumberVector,V extends NumberVector>

Parameters:

obj - Database object to normalize

Returns:

Normalized database object

getInputTypeRestriction

protected SimpleTypeInformation<? super V> getInputTypeRestriction()

Description copied from class: AbstractStreamConversionFilter

Get the input type restriction used for negotiating the data query.

Specified by:

getInputTypeRestriction in class AbstractStreamConversionFilter<V extends NumberVector,V extends NumberVector>

Returns:

Type restriction

convertedType

protected SimpleTypeInformation<? super V> convertedType(SimpleTypeInformation<V> in)

Description copied from class: AbstractStreamConversionFilter

Get the output type from the input type after conversion.

Specified by:

convertedType in class AbstractStreamConversionFilter<V extends NumberVector,V extends NumberVector>

Parameters:

in - input type restriction

Returns:

output type restriction

setSelectedAttributes

public void setSelectedAttributes(long[] selectedAttributes)

Sets the bits set to true in the given BitSet as selected attributes in NumberVectorFeatureSelectionFilter.Parameterizer.SELECTED_ATTRIBUTES_ID.

Parameters:

selectedAttributes - the new selected attributes

getSelectedAttributes

public long[] getSelectedAttributes()

Provides a BitSet with the bits set to true corresponding to the selected attributes in NumberVectorFeatureSelectionFilter.Parameterizer.SELECTED_ATTRIBUTES_ID.

Returns:

the selected attributes

getDimensionality

public int getDimensionality()

Get the resulting dimensionality.

Returns:

dimensionality