idl.tmt.representation.transformations
Class TermOccurrenceFilter

java.lang.Object
  |
  +--idl.tmt.representation.transformations.TermOccurrenceFilter

All Implemented Interfaces:

CollectionTransformation

public class TermOccurrenceFilter

extends java.lang.Object

implements CollectionTransformation

Matrix transformation that filters columns (terms) out of the matrix based on max or min occurrences. also filters the term list to match the filtered matrix Created on May 5, 2004

Author:

jelsas

Inner Class Summary

class

TermOccurrenceFilter.MakeZerosAfterCol

Field Summary

private boolean	hasBeenRun
private double	minOccurrences
private int	termsAfter
private int	termsBefore

Fields inherited from interface idl.tmt.representation.transformations.CollectionTransformation

STATUS_COMPLETE, STATUS_NONE

Constructor Summary

TermOccurrenceFilter()

TermOccurrenceFilter(double minOccurrences)

Method Summary

private TmtMatrix	filterTerms(double minOccurrences, TmtMatrix matrix, TermList termList)
private DoubleMatrix2D	getGlobalTermCounts(TmtMatrix matrix)
double	getMinOccurrences()
java.lang.String	getStatus() Provides a short string description of the collection transformation.
boolean	makesMatrixDense() Indicates whether the modification to the collection by this transformation makes the underlying matrix a dense matrix.
void	setMinOccurrences(double minOccurrences)
java.lang.String	toString()
void	transformCollection(IndexedCollection collection) general method for transforming the given collection.

Methods inherited from class java.lang.Object

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

Field Detail

minOccurrences

private double minOccurrences

hasBeenRun

private boolean hasBeenRun

termsBefore

private int termsBefore

termsAfter

private int termsAfter

Constructor Detail

TermOccurrenceFilter

public TermOccurrenceFilter(double minOccurrences)

TermOccurrenceFilter

public TermOccurrenceFilter()

Method Detail

filterTerms

private TmtMatrix filterTerms(double minOccurrences,
                              TmtMatrix matrix,
                              TermList termList)

getGlobalTermCounts

private DoubleMatrix2D getGlobalTermCounts(TmtMatrix matrix)

transformCollection

public void transformCollection(IndexedCollection collection)

Description copied from interface: CollectionTransformation

general method for transforming the given collection. the implementors should modify this colleciton object, not create a new one.

Specified by:

transformCollection in interface CollectionTransformation

Following copied from interface: idl.tmt.representation.transformations.CollectionTransformation

Parameters:

collection -

makesMatrixDense

public boolean makesMatrixDense()

Description copied from interface: CollectionTransformation

Indicates whether the modification to the collection by this transformation makes the underlying matrix a dense matrix. This method is used to indicated if the matrix should be written to disk after this transformation is performed.

Specified by:

makesMatrixDense in interface CollectionTransformation

Following copied from interface: idl.tmt.representation.transformations.CollectionTransformation

Returns:

setMinOccurrences

public void setMinOccurrences(double minOccurrences)

getMinOccurrences

public double getMinOccurrences()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getStatus

public java.lang.String getStatus()

Description copied from interface: CollectionTransformation

Provides a short string description of the collection transformation. Implementors should return the CollectionTransformation.STAUS_NONE if the transformation has not yet been run.

Specified by:

getStatus in interface CollectionTransformation