This class computes a distance that is the linear combination of any number of other DistanceFunctions. More...

#include <linearcombinationdistance.h>

Inheritance diagram for gaia2::LinearCombinationDistance:

Public Member Functions
	LinearCombinationDistance (const PointLayout &layout, const ParameterMap &params)

void	addDistance (DistanceFunction *f, Real coeff)

Real	operator() (const Point &p1, const Point &p2, int seg1, int seg2) const
	This function computes the distance between the two given points. More...

Public Member Functions inherited from gaia2::DistanceFunction
	DistanceFunction (const PointLayout &layout, const ParameterMap &params)

const PointLayout &	layout () const

const Region &	checkFixedLength (const Region &region) const
	Checks that the given Region only contains fixed-length descriptors and throws an exception if not. More...

Protected Attributes
QVector< QPair< DistanceFunction *, Real > >	_weights

Protected Attributes inherited from gaia2::DistanceFunction
PointLayout	_layout

ParameterMap	_params

Region	_region

Additional Inherited Members
Public Attributes inherited from gaia2::DistanceFunction
QString	name
	Name for the metric, usually the key that was used to instantiate it from the factory.

QStringList	validParams
	List of valid parameters this analyzer accepts. More...

Detailed Description

This class computes a distance that is the linear combination of any number of other DistanceFunctions.

For instance, in a recommender system, a set of weights could be seen as a user profile, each user having its own preferences regarding which distance is more useful to him.

Parameters

parameterMap	the parameterMap passed as argument should contain mapping from a name to a map containing the following fields: "distance", "params" and "weight".
distance	the name of the metric to create.
params	the ParameterMap to be used when creating the specified metric.
weight	the weight to be assigned to this metric in the linear combination.

Member Function Documentation

Real LinearCombinationDistance::operator()	(	const Point &	p1,
		const Point &	p2,
		int	seg1,
		int	seg2
	)		const

virtual

This function computes the distance between the two given points.

It needs to be implemented in each subclass. It takes as optional arguments the number of the segments on which to operate.

Implements gaia2::DistanceFunction.

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

src/metrics/linearcombinationdistance.h
src/metrics/linearcombinationdistance.cpp

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation