AliLandauGausFitter Class Reference

#include <AliLandauGausFitter.h>

Public Types
enum	{   kC = AliLandauGaus::kC, kDelta = AliLandauGaus::kDelta, kXi = AliLandauGaus::kXi, kSigma = AliLandauGaus::kSigma,   kSigmaN = AliLandauGaus::kSigmaN, kN = AliLandauGaus::kN, kA = AliLandauGaus::kA }

Public Member Functions
	AliLandauGausFitter (Double_t lowCut, Double_t maxRange, UShort_t minusBins)
virtual	~AliLandauGausFitter ()
void	SetDebug (Bool_t debug=true)
void	Clear ()
TF1 *	Fit1Particle (TH1 *dist, Double_t sigman=-1)
TF1 *	FitNParticle (TH1 *dist, UShort_t n, Double_t sigman=-1)
TF1 *	FitComposite (TH1 *dist, Double_t sigman)
Double_t	GetLowCut () const
Double_t	GetMaxRange () const
UShort_t	GetMinusBins () const
const TObjArray &	GetFitResults () const
TObjArray &	GetFitResults ()
const TObjArray &	GetFunctions () const
TObjArray &	GetFunctions ()

Static Public Member Functions
static const char *	GetFitOptions ()

Protected Member Functions
void	SetParLimits (TF1 *f, Int_t iPar, Double_t test, Double_t low, Double_t high)

Protected Attributes
const Double_t	fLowCut
const Double_t	fMaxRange
const UShort_t	fMinusBins
TObjArray	fFitResults
TObjArray	fFunctions
Bool_t	fDebug

Detailed Description

Fit Landau-Gauss distributions to energy loss distributions

See Also

AliLandauGaus

Definition at line 30 of file AliLandauGausFitter.h.

Member Enumeration Documentation

anonymous enum

Enumeration of parameters

Enumerator
kC	Index of pre-constant \( C\)
kDelta	Index of most probable value \( \Delta_p\)
kXi	Index of Landau width \( \xi\)
kSigma	Index of Gaussian width \( \sigma\)
kSigmaN	Index of Gaussian additional width \( \sigma_n\)
kN	Index of Number of particles \( N\)
kA	Base index of particle strengths \( a_i\) for \(i=2,\ldots,N\)

Definition at line 36 of file AliLandauGausFitter.h.

Constructor & Destructor Documentation

AliLandauGausFitter::AliLandauGausFitter ( Double_t  lowCut, Double_t  maxRange, UShort_t  minusBins  )

inline

Constructor

Parameters

lowCut	Lower cut of spectrum - data below this cuts is ignored
maxRange	Maximum range to fit to
minusBins	The number of bins below maximum to use

Definition at line 66 of file AliLandauGausFitter.h.

virtual AliLandauGausFitter::~AliLandauGausFitter ( )

inlinevirtual

Destructor

Definition at line 77 of file AliLandauGausFitter.h.

Member Function Documentation

void AliLandauGausFitter::Clear ( )

inline

Clear internal arrays

Definition at line 92 of file AliLandauGausFitter.h.

Referenced by Fit1Particle(), and AliFMDEnergyFitter::RingHistos::FitHist().

TF1 * AliLandauGausFitter::Fit1Particle ( TH1 *  dist, Double_t  sigman = -1  )

inline

Fit a 1-particle signal to the passed energy loss distribution

Note that this function clears the internal arrays first

Parameters

dist	Data to fit the function to
sigman	If larger than zero, the initial guess of the detector induced noise. If zero or less, then this parameter is ignored in the fit (fixed at 0)

Returns

The function fitted to the data

Definition at line 213 of file AliLandauGausFitter.h.

Referenced by AliFMDEnergyFitter::RingHistos::FitHist(), and FitNParticle().

TF1 * AliLandauGausFitter::FitComposite ( TH1 *  dist, Double_t  sigman  )

inline

Fit a composite distribution of energy loss from both primaries and secondaries

Parameters

dist	Distribution
sigman	If larger than zero, the initial guess of the detector included noise. If zero or less this parameter is fixed to 0.

Returns

Function fitted to the data

Definition at line 348 of file AliLandauGausFitter.h.

TF1 * AliLandauGausFitter::FitNParticle ( TH1 *  dist, UShort_t  n, Double_t  sigman = -1  )

inline

Fit a N-particle signal to the passed energy loss distribution

If there's no 1-particle fit present, it does that first

Parameters

dist	Data to fit the function to
n	Number of particle signals to fit
sigman	If larger than zero, the initial guess of the detector induced noise. If zero or less, then this parameter is ignored in the fit (fixed at 0)

Returns

The function fitted to the data

Definition at line 279 of file AliLandauGausFitter.h.

Referenced by AliFMDEnergyFitter::RingHistos::FitHist().

static const char* AliLandauGausFitter::GetFitOptions ( )

inlinestatic

Get the fit options to use

Returns

Fit options used through-out

Definition at line 58 of file AliLandauGausFitter.h.

Referenced by Fit1Particle(), FitComposite(), and FitNParticle().

const TObjArray& AliLandauGausFitter::GetFitResults ( ) const

inline

Get Array of fit results

Returns

Array of fit results

Definition at line 159 of file AliLandauGausFitter.h.

Referenced by AliFMDEnergyFitter::RingHistos::FitHist().

TObjArray& AliLandauGausFitter::GetFitResults ( )

inline

Get Array of fit results

Returns

Array of fit results

Definition at line 165 of file AliLandauGausFitter.h.

const TObjArray& AliLandauGausFitter::GetFunctions ( ) const

inline

Get Array of functions

Returns

Array of functions

Definition at line 171 of file AliLandauGausFitter.h.

Referenced by AliFMDEnergyFitter::RingHistos::FitHist().

TObjArray& AliLandauGausFitter::GetFunctions ( )

inline

Get Array of functions

Returns

Array of functions

Definition at line 177 of file AliLandauGausFitter.h.

Double_t AliLandauGausFitter::GetLowCut ( ) const

inline

Get Lower cut on data

Returns

Lower cut on data

Definition at line 141 of file AliLandauGausFitter.h.

Double_t AliLandauGausFitter::GetMaxRange ( ) const

inline

Get Maximum range to fit

Returns

Maximum range to fit

Definition at line 147 of file AliLandauGausFitter.h.

UShort_t AliLandauGausFitter::GetMinusBins ( ) const

inline

Get Number of bins from maximum to fit 1st peak

Returns

Number of bins from maximum to fit 1st peak

Definition at line 153 of file AliLandauGausFitter.h.

void AliLandauGausFitter::SetDebug ( Bool_t  debug = true )

inline

Enable/disable debugging output.

Parameters

debug

If true, enable debugging output

Definition at line 87 of file AliLandauGausFitter.h.

Referenced by AliFMDEnergyFitter::RingHistos::FitHist().

void AliLandauGausFitter::SetParLimits ( TF1 *  f, Int_t  iPar, Double_t  test, Double_t  low, Double_t  high  )

inlineprotected

Set parameter limits on the function f. The limits are only set if \( low \le test \le high\)

Parameters

f	Function object
iPar	Parameter number
test	Initial guess
low	Low limit
high	high limit

Definition at line 189 of file AliLandauGausFitter.h.

Referenced by Fit1Particle(), and FitNParticle().

Member Data Documentation

Bool_t AliLandauGausFitter::fDebug

protected

Definition at line 207 of file AliLandauGausFitter.h.

Referenced by Fit1Particle(), FitComposite(), FitNParticle(), SetDebug(), and SetParLimits().

TObjArray AliLandauGausFitter::fFitResults

protected

Definition at line 205 of file AliLandauGausFitter.h.

Referenced by AliLandauGausFitter(), Clear(), Fit1Particle(), FitNParticle(), GetFitResults(), and ~AliLandauGausFitter().

TObjArray AliLandauGausFitter::fFunctions

protected

Definition at line 206 of file AliLandauGausFitter.h.

Referenced by AliLandauGausFitter(), Clear(), Fit1Particle(), FitNParticle(), GetFunctions(), and ~AliLandauGausFitter().

const Double_t AliLandauGausFitter::fLowCut

protected

Definition at line 202 of file AliLandauGausFitter.h.

Referenced by Fit1Particle(), FitComposite(), and GetLowCut().

const Double_t AliLandauGausFitter::fMaxRange

protected

Definition at line 203 of file AliLandauGausFitter.h.

Referenced by Fit1Particle(), FitComposite(), FitNParticle(), and GetMaxRange().

const UShort_t AliLandauGausFitter::fMinusBins

protected

Definition at line 204 of file AliLandauGausFitter.h.

Referenced by Fit1Particle(), FitComposite(), and GetMinusBins().

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

• PWGLF/FORWARD/analysis2/AliLandauGausFitter.h