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prapi::ProximityMultiplier< T > Class Template Reference

#include <ProximityMeasure.h>

Inheritance diagram for prapi::ProximityMultiplier< T >:

List of all members.

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Detailed Description

template<class T>
class prapi::ProximityMultiplier< T >

Multiplier is a wrap-up measure that multiplies the value provided by another measure by a constant value.

It may be used in scaling the measured values.

Example:

 MyProximityMeasure myProximity; //Inherited from ProximityMeasure<float>

 //Create a kNN classifier that uses MyProximityMeasure and scales the
 //proximity values to the range [0,1]. The values min and max can
 //be obtained for example from ProximityMatrix.
 kNNClassifier<float> knn(trainingSamples,
                          new ProximityMultiplier<float>(new ProximityAdder<float>(myProximity,
                                                                                  -min),
                                                         1/(max-min)));
 

Deprecated:

Use ProximityModifier instead

See also:

ProximityModifier , ProximityAdder , ProximityMatrix , Classifier

Public Methods
	ProximityMultiplier (ProximityMeasure< T > *measure, double value)
	Create a new Multiplier that uses the given proximity measure.
	ProximityMultiplier (ProximityMeasure< T > &measure, double value)
	Create a new Multiplier that uses the given proximity measure.
virtual	~ProximityMultiplier ()
double	getProximity (const util::List< T > &sample, const util::List< T > &model, double stopAfter) const throw (ProximityException&)
	Proximity between two lists.

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Constructor & Destructor Documentation

template<class T> prapi::ProximityMultiplier< T >::ProximityMultiplier (  ProximityMeasure< T > *    measure, double    value )  [inline]

Create a new Multiplier that uses the given proximity measure. Note that if you use this constructor, the memory pointed by measure is automatically released upon the deletion of the Multiplier. Parameters: measure  a pointer to the actual measure to be used value  the value by which the measured proximities are to be multiplied

template<class T> prapi::ProximityMultiplier< T >::ProximityMultiplier (  ProximityMeasure< T > &    measure, double    value )  [inline]

Create a new Multiplier that uses the given proximity measure. Parameters: measure  a pointer to the actual measure to be used value  the value by which the measured proximities are to be multiplied

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Member Function Documentation

template<class T> double prapi::ProximityMultiplier< T >::getProximity (  const util::List< T > &    sample, const util::List< T > &    model, double    stopAfter )  const throw (ProximityException&) [inline, virtual]

Proximity between two lists. Parameters: sample  the list to be classified model  the model stopAfter  A value that can be used in optimizing the performance of a proximity measure. Classifiers may set this value to inform the proximity measure to stop if it notices the proximity will be over a certain value. For example, the kNN classifier sets this value to the kth smallest proximity so far. If a sample is not closer than that, then it makes no sense to inspect it any more. Implements prapi::ProximityMeasure< T >.

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The documentation for this class was generated from the following file:

• ProximityMeasure.h

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Documentation generated on 11.09.2003 with Doxygen.
The documentation is copyrighted material.
Copyright © Topi Mäenpää 2003. All rights reserved.