Fit invariant mass distributions. More...

#include <TH1D.h>
#include <TF1.h>
#include <TMath.h>
#include <TGraphErrors.h>

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Functions
static Double_t	FunctionCrystalBall (Double_t x, Double_t par)

static Double_t	FunctionGaussPol3 (Double_t x, Double_t par)

static Double_t	FunctionGaussPol2 (Double_t x, Double_t par)

static Double_t	FunctionGaussPol1 (Double_t x, Double_t par)

static Double_t	FunctionGaussPol0 (Double_t x, Double_t par)

static Double_t	FunctionTruncatedPolEta (Double_t x, Double_t par)

static Double_t	FunctionTruncatedPolPi0 (Double_t x, Double_t par)

static Double_t	GetFractionError (Double_t num, Double_t den, Double_t numErr, Double_t denErr)

static TGraphErrors *	DivideGraphs (TGraphErrors gNum, TGraphErrors gDen)

static void	GetRangeIntegralAndError (TH1D *h, Int_t binMin, Int_t binMax, Double_t &integral, Double_t &integralErr)

static void	GetRangeIntegralAndError (TH1D *h, Float_t minX, Float_t maxX, Double_t &integral, Double_t &integralErr)

void	RemovePointsOutOfRangeOrLargeErrorFromGraph (TGraphErrors *graph, Double_t min, Double_t max, Float_t errFraction=0.5, Float_t value=-1, Float_t valueErr=0)

static void	ScaleBinBySize (TH1D *h)
	Scale histogram bins by its size. More...

Detailed Description

Fit invariant mass distributions.

Macro that containes useful small methods that can be used in plotting macros

Author: Gustavo Conesa Balbastre Gusta.nosp@m.vo.C.nosp@m.onesa.nosp@m..Bal.nosp@m.bastr.nosp@m.e@ce.nosp@m.rn.ch, (LPSC-CNRS)

Definition in file PlotUtils.C.

Function Documentation

static TGraphErrors* DivideGraphs	(	TGraphErrors *	gNum,
		TGraphErrors *	gDen
	)

static

Divide 2 TGraphErrors

Returns: TGraphError result of division

Parameters

gNum	TGraphError numerator
gDen	TGraphError denominator

Definition at line 151 of file PlotUtils.C.

Referenced by GetFractionError(), and PlotGraphs().

static Double_t FunctionCrystalBall	(	Double_t *	x,
		Double_t *	par
	)

static

Crystal ball function. Fitting function.

Definition at line 25 of file PlotUtils.C.

Referenced by SetFitFun().

static Double_t FunctionGaussPol0	(	Double_t *	x,
		Double_t *	par
	)

static

Gaussian plus constant function. Fitting function.

Definition at line 84 of file PlotUtils.C.

Referenced by SetFitFun().

static Double_t FunctionGaussPol1	(	Double_t *	x,
		Double_t *	par
	)

static

Gaussian plus polinomial order 1 function. Fitting function.

Definition at line 72 of file PlotUtils.C.

Referenced by SetFitFun().

static Double_t FunctionGaussPol2	(	Double_t *	x,
		Double_t *	par
	)

static

Gaussian plus polinomial order 2 function. Fitting function.

Definition at line 60 of file PlotUtils.C.

Referenced by SetFitFun().

static Double_t FunctionGaussPol3	(	Double_t *	x,
		Double_t *	par
	)

static

Gaussian plus polinomial order 3 function. Fitting function.

Definition at line 48 of file PlotUtils.C.

Referenced by SetFitFun().

static Double_t FunctionTruncatedPolEta	(	Double_t *	x,
		Double_t *	par
	)

static

Truncated function in eta region. Fitting function.

Definition at line 96 of file PlotUtils.C.

Referenced by SetFitFun().

static Double_t FunctionTruncatedPolPi0	(	Double_t *	x,
		Double_t *	par
	)

static

Truncated function in pi0 region. Fitting function.

Definition at line 112 of file PlotUtils.C.

Referenced by SetFitFun().

static Double_t GetFractionError	(	Double_t	num,
		Double_t	den,
		Double_t	numErr,
		Double_t	denErr
	)

static

Calculation of error of a fraction

Returns: fraction error

Parameters

num numerator

Definition at line 132 of file PlotUtils.C.

Referenced by DivideGraphs(), Efficiency(), FunctionTruncatedPolPi0(), and PrimarySpectra().

static void GetRangeIntegralAndError	(	TH1D *	h,
		Int_t	binMin,
		Int_t	binMax,
		Double_t &	integral,
		Double_t &	integralErr
	)

static

Get a TH1D integral and its error within a bin range

Parameters

h	TH1D
binMin	First bin of integration
binMax	Last bin of integration
integral	sum between first and last bin
integralErr	error of integral

Definition at line 208 of file PlotUtils.C.

Referenced by DivideGraphs(), GetRangeIntegralAndError(), PrimarySpectra(), and ProjectAndFit().

static void GetRangeIntegralAndError	(	TH1D *	h,
		Float_t	minX,
		Float_t	maxX,
		Double_t &	integral,
		Double_t &	integralErr
	)

static

Get a TH1D integral and its error within a x axis range

Parameters

h	TH1D
minX	x axis minimum value
maxX	x axis maximum value
integral	sum between first and last bin
integralErr	error of integral

Definition at line 235 of file PlotUtils.C.

void RemovePointsOutOfRangeOrLargeErrorFromGraph	(	TGraphErrors *	graph,
		Double_t	min,
		Double_t	max,
		Float_t	errFraction = `0.5`,
		Float_t	value = `-1`,
		Float_t	valueErr = `0`
	)

When plotting multiple graphs, and need to set different ranges Those points with too large error or out of the desired range are set to a default value out of the plot scale

Parameters

graph	TGraphError
min	x axis minimum value
max	x axis maximum value
errFraction	If error of point is larger than a fraction of the point, it is removed
value	default value for removed point
valueErr	default error value for removed point

Definition at line 257 of file PlotUtils.C.

Referenced by GetRangeIntegralAndError().

static void ScaleBinBySize ( TH1D * h )

static

Scale histogram bins by its size.

Definition at line 285 of file PlotUtils.C.

Referenced by PrimarySpectra().

Functions

Detailed Description

Function Documentation