BALL::FermiBaseFunction Class Reference

#include <BALL/SCORING/COMMON/fermiBaseFunction.h>

Inheritance diagram for BALL::FermiBaseFunction:

List of all members.

Public Member Functions
	FermiBaseFunction ()
	FermiBaseFunction (float lower, float upper)
void	setLower (float lower)
void	setUpper (float upper)
float	calculate (float x) const
float	calculate (float x, float lower, float upper)
Private Member Functions
void	computeFermiParameters_ ()
Private Attributes
float	a_
float	b_

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Detailed Description

Sigmoidal base function

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Constructor & Destructor Documentation

BALL::FermiBaseFunction::FermiBaseFunction

(

)

BALL::FermiBaseFunction::FermiBaseFunction	(	float	lower,
		float	upper
	)

The function is defined in such a way that the score approaches 1 for values < lower and 0 for values > upper. If you need contrary behaviour, you have to supply a "lower" which is greater than "upper". This will invert the function.

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Member Function Documentation

float BALL::FermiBaseFunction::calculate	(	float	x,
		float	lower,
		float	upper
	)			[virtual]

Reimplemented from BALL::ScoringBaseFunction.

float BALL::FermiBaseFunction::calculate

(

float

x

)

const [virtual]

Reimplemented from BALL::ScoringBaseFunction.

void BALL::FermiBaseFunction::computeFermiParameters_

(

)

[private]

void BALL::FermiBaseFunction::setLower

(

float

lower

)

[virtual]

Reimplemented from BALL::ScoringBaseFunction.

void BALL::FermiBaseFunction::setUpper

(

float

upper

)

[virtual]

Reimplemented from BALL::ScoringBaseFunction.

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Member Data Documentation

float BALL::FermiBaseFunction::a_ [private]

float BALL::FermiBaseFunction::b_ [private]