damina::L1Distance Class Reference

L1 Distance implementation. More...

#include <L1Distance.h>

Inheritance diagram for damina::L1Distance:

[legend]Collaboration diagram for damina::L1Distance:

[legend]List of all members.

Public Member Functions
virtual double	calculateDistance (struct svm_node *, struct svm_node *)
	Computes the L1 Distance between two points (poits are in libsvm format).
	L1Distance ()
	Constructor.
virtual	~L1Distance ()
	Destructor.

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Detailed Description

L1 Distance implementation.

Definition at line 12 of file L1Distance.h.

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Constructor & Destructor Documentation

damina::L1Distance::L1Distance

(

)

Constructor.

Definition at line 8 of file L1Distance.cpp.

                               {
                
        }

damina::L1Distance::~L1Distance

(

)

[virtual]

Destructor.

Definition at line 15 of file L1Distance.cpp.

                                {
        
        }

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Member Function Documentation

double damina::L1Distance::calculateDistance	(	struct svm_node *	px,
		struct svm_node *	py
	)			[virtual]

Computes the L1 Distance between two points (poits are in libsvm format).

Parameters:

	px	The first point
	py	The second point

Returns:

The value of the distance between two points

Implements damina::EuclideanDistance.

Definition at line 26 of file L1Distance.cpp.

                                                                                     {
                        double sum = 0;
                        while(px->index != -1 && py->index != -1)
                        {
                                if(px->index == py->index)
                                {
                                        sum += fabs(px->value - py->value);
                                        ++px;
                                        ++py;
                                }
                                else
                                {
                                        if(px->index > py->index)
                                        {
                                                sum += fabs(py->value);
                                                ++py;
                                        }
                                        else
                                        {
                                                sum += fabs(px->value);
                                                ++px;
                                        }
                                }
                        
                        }
                        while(px->index != -1)
                        {
                                sum += fabs(px->value);
                                ++px;
                        }
                        while (py->index != -1)
                        {
                                sum += fabs (py->value);
                                ++py;
                        }
                        return sum;
        }

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

• L1Distance.h
• L1Distance.cpp

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