Package elki.datasource.filter.transform
Class NumberVectorFeatureSelectionFilter<V extends NumberVector>
- java.lang.Object
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- elki.datasource.filter.AbstractStreamFilter
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- elki.datasource.filter.AbstractStreamConversionFilter<I,O>
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- elki.datasource.filter.AbstractVectorStreamConversionFilter<V,V>
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- elki.datasource.filter.transform.NumberVectorFeatureSelectionFilter<V>
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- 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:
- 0.5.5
- Author:
- Arthur Zimek
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
NumberVectorFeatureSelectionFilter.Par
Parameterization class.-
Nested classes/interfaces inherited from interface elki.datasource.bundle.BundleStreamSource
BundleStreamSource.Event
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Field Summary
Fields Modifier and Type Field Description private long[]
selectedAttributes
Keeps the selection of the subspace to project onto.-
Fields inherited from class elki.datasource.filter.AbstractVectorStreamConversionFilter
factory
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Fields inherited from class elki.datasource.filter.AbstractStreamFilter
source
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Constructor Summary
Constructors Constructor Description NumberVectorFeatureSelectionFilter(long[] selectedAttributes)
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method 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 inNumberVectorFeatureSelectionFilter.Par.SELECTED_ATTRIBUTES_ID
.void
setSelectedAttributes(long[] selectedAttributes)
Sets the bits set to true in the given BitSet as selected attributes inNumberVectorFeatureSelectionFilter.Par.SELECTED_ATTRIBUTES_ID
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Methods inherited from class elki.datasource.filter.AbstractVectorStreamConversionFilter
initializeOutputType
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Methods inherited from class elki.datasource.filter.AbstractStreamConversionFilter
data, getMeta, nextEvent
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Methods inherited from class elki.datasource.filter.AbstractStreamFilter
asMultipleObjectsBundle, assignDBID, filter, hasDBIDs, init, toString
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Method Detail
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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 classAbstractStreamConversionFilter<V extends NumberVector,V extends NumberVector>
- Parameters:
obj
- Database object to normalize- Returns:
- Normalized database object
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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 classAbstractStreamConversionFilter<V extends NumberVector,V extends NumberVector>
- Returns:
- Type restriction
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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 classAbstractStreamConversionFilter<V extends NumberVector,V extends NumberVector>
- Parameters:
in
- input type restriction- Returns:
- output type restriction
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setSelectedAttributes
public void setSelectedAttributes(long[] selectedAttributes)
Sets the bits set to true in the given BitSet as selected attributes inNumberVectorFeatureSelectionFilter.Par.SELECTED_ATTRIBUTES_ID
.- Parameters:
selectedAttributes
- the new selected attributes
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getSelectedAttributes
public long[] getSelectedAttributes()
Provides a BitSet with the bits set to true corresponding to the selected attributes inNumberVectorFeatureSelectionFilter.Par.SELECTED_ATTRIBUTES_ID
.- Returns:
- the selected attributes
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getDimensionality
public int getDimensionality()
Get the resulting dimensionality.- Returns:
- dimensionality
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