de.lmu.ifi.dbs.elki.datasource.filter
Class AbstractFeatureSelectionFilter<V extends FeatureVector<?,?>>

java.lang.Object
  de.lmu.ifi.dbs.elki.datasource.filter.AbstractConversionFilter<V,V>
      de.lmu.ifi.dbs.elki.datasource.filter.AbstractFeatureSelectionFilter<V>

Type Parameters:

V - the type of FeatureVector contained in both the original and projected data.

All Implemented Interfaces:

ObjectFilter

Direct Known Subclasses:

DoubleVectorProjectionFilter, SparseFloatVectorProjectionFilter

public abstract class AbstractFeatureSelectionFilter<V extends FeatureVector<?,?>>
extends AbstractConversionFilter<V,V>

A ProjectionParser projects the objects of its base parser onto a subspace specified by a BitSet.

Nested Class Summary

static class

AbstractFeatureSelectionFilter.Parameterizer<V extends NumberVector<V,?>> Parameterization class.

Field Summary

static OptionID	SELECTED_ATTRIBUTES_ID Selected attributes parameter.
private BitSet	selectedAttributes Keeps the selection of the subspace to project onto.

Constructor Summary

AbstractFeatureSelectionFilter(BitSet selectedAttributes)
Constructor.

Method Summary

int	getDimensionality() Get the resulting dimensionality.
BitSet	getSelectedAttributes() Provides a BitSet with the bits set to true corresponding to the selected attributes in SELECTED_ATTRIBUTES_ID.
void	setSelectedAttributes(BitSet selectedAttributes) Sets the bits set to true in the given BitSet as selected attributes in SELECTED_ATTRIBUTES_ID.

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

convertedType, filter, filterSingleObject, getInputTypeRestriction, prepareComplete, prepareProcessInstance, prepareStart

Methods inherited from class java.lang.Object

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

Field Detail

SELECTED_ATTRIBUTES_ID

public static final OptionID SELECTED_ATTRIBUTES_ID

Selected attributes parameter.

Key: -projectionfilter.selectedattributes

selectedAttributes

private BitSet selectedAttributes

Keeps the selection of the subspace to project onto.

Constructor Detail

AbstractFeatureSelectionFilter

public AbstractFeatureSelectionFilter(BitSet selectedAttributes)

Constructor.

Parameters:

selectedAttributes -

Method Detail

setSelectedAttributes

public void setSelectedAttributes(BitSet selectedAttributes)

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

The index in the BitSet is expected to be shifted to the left by one, i.e., index 0 in the BitSet relates to the first attribute.

Parameters:

selectedAttributes - the new selected attributes

getSelectedAttributes

public BitSet getSelectedAttributes()

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

The index in the BitSet is shifted to the left by one, i.e., index 0 in the BitSet relates to the first attribute.

Returns:

the selected attributes

getDimensionality

public int getDimensionality()

Get the resulting dimensionality.

Returns:

dimensionality