marf.Stats.StatisticalEstimators.Smoothing
Class WittenBell

java.lang.Object
  marf.Storage.StorageManager
      marf.Stats.StatisticalEstimators.StatisticalEstimator
          marf.Stats.StatisticalEstimators.Smoothing.Smoothing
              marf.Stats.StatisticalEstimators.Smoothing.WittenBell

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, IStatisticalEstimator, ISmoothing, IStorageManager

public class WittenBell
extends Smoothing

Represents Witten-Bell Smoothing Algorithm.

$Id: WittenBell.java,v 1.21 2007/12/18 21:57:15 mokhov Exp $

Since:

0.3.0.2

Version:

$Revision: 1.21 $

Author:

Serguei Mokhov

See Also:

Serialized Form

Field Summary

Fields inherited from class marf.Stats.StatisticalEstimators.StatisticalEstimator

oProbabilityTable, oStreamTokenizer

Fields inherited from class marf.Storage.StorageManager

bDumpOnNotFound, iCurrentDumpMode, oObjectToSerialize, strFilename

Fields inherited from interface marf.Stats.StatisticalEstimators.Smoothing.ISmoothing

MARF_INTERFACE_CODE_REVISION

Fields inherited from interface marf.Stats.StatisticalEstimators.IStatisticalEstimator

MARF_INTERFACE_CODE_REVISION

Fields inherited from interface marf.Storage.IStorageManager

DUMP_BINARY, DUMP_CSV_TEXT, DUMP_GZIP_BINARY, DUMP_HTML, DUMP_SQL, DUMP_XML, MARF_INTERFACE_CODE_REVISION, STORAGE_FILE_EXTENSIONS

Constructor Summary

WittenBell()
Default constructor with a call to the parent.

Method Summary

static java.lang.String	getMARFSourceCodeRevision() Returns source code revision information.
double	p(Ngram poNgram) Not implemented.
boolean	smooth() Implements the Witten-Bell smoothing algorithm for uni-, bi, and tri-gram models.

Methods inherited from class marf.Stats.StatisticalEstimators.Smoothing.Smoothing

train

Methods inherited from class marf.Stats.StatisticalEstimators.StatisticalEstimator

backSynchronizeObject, dumpCSV, dumpXML, getFilename, getLanguage, getProbabilityTable, getStreamTokenizer, p, resetFilename, restoreCSV, restoreXML, setLanguage, setStreamTokenizer

Methods inherited from class marf.Storage.StorageManager

clone, dump, dumpBinary, dumpGzipBinary, dumpHTML, dumpSQL, enableDumpOnNotFound, equals, getDefaultExtension, getDefaultExtension, getDumpMode, getObjectToSerialize, hashCode, restore, restoreBinary, restoreGzipBinary, restoreHTML, restoreSQL, setDumpMode, setFilename, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

WittenBell

public WittenBell()

Default constructor with a call to the parent.

Method Detail

smooth

public boolean smooth()

Implements the Witten-Bell smoothing algorithm for uni-, bi, and tri-gram models.

Returns:

true if any smoothing took place and underlying data was altered

See Also:

ISmoothing.smooth()

p

public double p(Ngram poNgram)

Not implemented.

Parameters:

poNgram -

Returns:

0.0

getMARFSourceCodeRevision

public static java.lang.String getMARFSourceCodeRevision()

Returns source code revision information.

Returns:

revision string