V
- Vector typepublic class InverseDocumentFrequencyNormalization<V extends SparseNumberVector<?>> extends AbstractNormalization<V>
Modifier and Type | Field and Description |
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(package private) gnu.trove.map.TIntDoubleMap |
idf
The IDF storage.
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(package private) int |
objcnt
The number of objects in the dataset.
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factory
Constructor and Description |
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InverseDocumentFrequencyNormalization()
Constructor.
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Modifier and Type | Method and Description |
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protected V |
filterSingleObject(V featureVector)
Normalize a single instance.
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protected SimpleTypeInformation<? super V> |
getInputTypeRestriction()
Get the input type restriction used for negotiating the data query.
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protected void |
prepareComplete()
Complete the initialization phase.
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protected void |
prepareProcessInstance(V featureVector)
Process a single object during initialization.
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protected boolean |
prepareStart(SimpleTypeInformation<V> in)
Return "true" when the normalization needs initialization (two-pass filtering!).
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V |
restore(V featureVector)
Transforms a feature vector to the original attribute ranges.
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convertedType, normalizeObjects, toString, transform
initializeOutputType
filter
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
filter
gnu.trove.map.TIntDoubleMap idf
int objcnt
public InverseDocumentFrequencyNormalization()
protected boolean prepareStart(SimpleTypeInformation<V> in)
AbstractConversionFilter
prepareStart
in class AbstractConversionFilter<V extends SparseNumberVector<?>,V extends SparseNumberVector<?>>
in
- Input type informationprotected void prepareProcessInstance(V featureVector)
AbstractConversionFilter
prepareProcessInstance
in class AbstractConversionFilter<V extends SparseNumberVector<?>,V extends SparseNumberVector<?>>
featureVector
- Object to processprotected void prepareComplete()
AbstractConversionFilter
prepareComplete
in class AbstractConversionFilter<V extends SparseNumberVector<?>,V extends SparseNumberVector<?>>
protected V filterSingleObject(V featureVector)
AbstractConversionFilter
filterSingleObject
in class AbstractConversionFilter<V extends SparseNumberVector<?>,V extends SparseNumberVector<?>>
featureVector
- Database object to normalizepublic V restore(V featureVector)
Normalization
featureVector
- a feature vector to be transformed into original spaceprotected SimpleTypeInformation<? super V> getInputTypeRestriction()
AbstractConversionFilter
getInputTypeRestriction
in class AbstractConversionFilter<V extends SparseNumberVector<?>,V extends SparseNumberVector<?>>