KLFitter::ResCrystalBallJets Class Reference

This class offers a simple parameterization of a resolution. More...

#include <ResCrystalBallJets.h>

Inheritance diagram for KLFitter::ResCrystalBallJets:

Public Member Functions
	ResCrystalBallJets (const char *filename)
	The default constructor.
	ResCrystalBallJets (std::vector< double > const &parameters)
	A constructor that takes parameters directly, unlike the default constructor that takes a path to the file with TFs. More...
	~ResCrystalBallJets ()
	The (defaulted) destructor.
double	GetAlpha (double x) override
	Calculate the alpha from the TF parameters and the value of x. More...
double	GetN (double x) override
	Calculate the n parameter from the TF parameters and the value of x. More...
double	GetSigma (double x) override
	Calculate the sigma from the TF parameters and the value of x. More...
double	GetMean (double x) override
	Calculate the mean from the TF parameters and the value of x. More...
Public Member Functions inherited from KLFitter::ResCrystalBallBase
	ResCrystalBallBase (const char *filename)
	The default constructor.
	ResCrystalBallBase (std::vector< double > const &parameters)
	A constructor that takes parameters directly, unlike the default constructor that takes a path to the file with TFs. More...
virtual	~ResCrystalBallBase ()
	The (defaulted) destructor.
double	logp (double x, double xmeas, bool *good, double=0) override
	Return the probability of the true value of x given the measured value, xmeas. More...
double	LogCrystalBallFunction (double x, double alpha, double n, double sigma, double mean)
	A function that calculates CrystalBall See twiki: https://en.wikipedia.org/wiki/Crystal_Ball_function. More...
double	ApproxError (double x)
	An approximation of the error function needed to calculate crystal ball normalization with precision < 1e-4. More...
Public Member Functions inherited from KLFitter::ResolutionBase
	ResolutionBase (int npar)
	The default constructor. More...
	ResolutionBase (std::vector< double > parameters)
	A constructor. More...
virtual	~ResolutionBase ()
	The (defaulted) destructor.
int	Par (int index, double *par)
	Return a parameter of the parameterization. More...
int	SetPar (int index, double value)
	Set a parameter value. More...
int	SetPar (std::vector< double > parameters)
	Set all parameter values. More...
int	ReadParameters (const char *filename, std::size_t nparameters)
	Read parameter values from ASCII file. More...
int	Status ()
	Return a status code. More...

Additional Inherited Members
Static Public Member Functions inherited from KLFitter::ResCrystalBallBase
static bool	CheckCrystalBallSanity (double *sigma, double *n)
	Sanity check for the crystal ball parameters sigma, and n (1st sigma, scale and 2nd sigma). More...
Protected Attributes inherited from KLFitter::ResolutionBase
int	fNParameters
	The number of parameters.
std::vector< double >	fParameters
	The parameter values.
int	fStatus
	The status of this class (1: ok, 0: error).

Detailed Description

This class offers a simple parameterization of a resolution.

The parameterization is a crystal ball with energy dependent parameters.

Constructor & Destructor Documentation

KLFitter::ResCrystalBallJets::ResCrystalBallJets ( std::vector< double > const &  parameters )

explicit

A constructor that takes parameters directly, unlike the default constructor that takes a path to the file with TFs.

Parameters

parameters

The parameters of the parameterization.

Member Function Documentation

double KLFitter::ResCrystalBallJets::GetAlpha ( double  x )

overridevirtual

Calculate the alpha from the TF parameters and the value of x.

Parameters

x	The value of x.

Returns

The alpha.

Implements KLFitter::ResCrystalBallBase.

double KLFitter::ResCrystalBallJets::GetMean ( double  x )

overridevirtual

Calculate the mean from the TF parameters and the value of x.

Parameters

x	The value of x.

Returns

The mean.

Implements KLFitter::ResCrystalBallBase.

double KLFitter::ResCrystalBallJets::GetN ( double  x )

overridevirtual

Calculate the n parameter from the TF parameters and the value of x.

Parameters

x	The value of x.

Returns

The n parameter.

Implements KLFitter::ResCrystalBallBase.

double KLFitter::ResCrystalBallJets::GetSigma ( double  x )

overridevirtual

Calculate the sigma from the TF parameters and the value of x.

Parameters

x	The value of x.

Returns

The sigma.

Implements KLFitter::ResolutionBase.

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

• include/KLFitter/ResCrystalBallJets.h
• src/ResCrystalBallJets.cxx