marf.Classification.Distance
Class MahalanobisDistance

java.lang.Object
  |
  +--marf.Storage.StorageManager
        |
        +--marf.Classification.Classification
              |
              +--marf.Classification.Distance.Distance
                    |
                    +--marf.Classification.Distance.MahalanobisDistance
All Implemented Interfaces:
IStorageManager, java.io.Serializable

public class MahalanobisDistance
extends Distance

Mahalanobis Distance Classification Module.

NOTE: Implemented as equivalent to Euclidean Distance in 0.2.0, i.e. the Covariance matrix is always an Indentity one.

$Id: MahalanobisDistance.java,v 1.17 2005/05/31 15:39:32 mokhov Exp $

Since:
0.2.0
Version:
$Revision: 1.17 $
Author:
Serguei Mokhov
See Also:
Serialized Form

Field Summary
 
Fields inherited from class marf.Classification.Classification
oFeatureExtraction, oResultSet, oTrainingSet
 
Fields inherited from class marf.Storage.StorageManager
iCurrentDumpMode, oObjectToSerialize, strFilename
 
Fields inherited from interface marf.Storage.IStorageManager
DUMP_BINARY, DUMP_CSV_TEXT, DUMP_GZIP_BINARY, DUMP_HTML, DUMP_SQL, DUMP_XML, INTERFACE_CODE_REVISION, sastrExtensionsMap
 
Constructor Summary
MahalanobisDistance(marf.FeatureExtraction.FeatureExtraction poFeatureExtraction)
          MahalanobisDistance Constructor.
 
Method Summary
 double distance(double[] paVector1, double[] paVector2)
          Partial MahalanobisDistance implementation.
static java.lang.String getRevision()
          Retrieves class' revision.
 
Methods inherited from class marf.Classification.Distance.Distance
classify, getResult
 
Methods inherited from class marf.Classification.Classification
dump, getResultSet, getTrainingSetFilename, restore, train
 
Methods inherited from class marf.Storage.StorageManager
backSynchronizeObject, dumpBinary, dumpCSV, dumpGzipBinary, dumpHTML, dumpSQL, dumpXML, getDefaultExtension, getDefaultExtension, getDumpMode, getFilename, restoreBinary, restoreCSV, restoreGzipBinary, restoreHTML, restoreSQL, restoreXML, setDumpMode, setFilename
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

MahalanobisDistance

public MahalanobisDistance(marf.FeatureExtraction.FeatureExtraction poFeatureExtraction)
MahalanobisDistance Constructor.

Parameters:
poFeatureExtraction - FeatureExtraction module reference
Method Detail

distance

public final double distance(double[] paVector1,
                             double[] paVector2)
Partial MahalanobisDistance implementation.

Specified by:
distance in class Distance
Parameters:
paVector1 - first vector to compare
paVector2 - second vector to compare
Returns:
Mahalanobis distance between two feature vectors

getRevision

public static java.lang.String getRevision()
Retrieves class' revision.

Returns:
revision string
Since:
0.3.0