Lau2DAbsHistDP Class Reference

Abstract base class for defining a variation across a 2D DP based on a histogram. More...

#include <Lau2DAbsHistDP.hh>

Inheritance diagram for Lau2DAbsHistDP:

Public Member Functions
	Lau2DAbsHistDP (const LauDaughters *daughters, Bool_t useUpperHalfOnly=kFALSE, Bool_t squareDP=kFALSE)
	Constructor. More...
virtual	~Lau2DAbsHistDP ()
	Copy constructor. More...
virtual Double_t	interpolateXY (Double_t x, Double_t y) const =0
	Perform the interpolation. More...
Public Member Functions inherited from Lau2DAbsDP
	Lau2DAbsDP ()
	Constructor. More...
virtual	~Lau2DAbsDP ()
	Destructor. More...

Protected Member Functions
void	doBinFluctuation (TH2 *hist)
	Fluctuate the contents of each histogram bin independently, in accordance with their errors. More...
void	raiseOrLowerBins (TH2 *hist, Double_t avEff, Double_t avEffError)
	Rescale the histogram bin contents based on the desired average efficiency and its uncertainty. More...
Double_t	computeAverageContents (TH2 const *const hist) const
	Compute the average bin content for bins within the kinematic boundary. More...
Bool_t	withinDPBoundaries (Double_t x, Double_t y) const
	Check whether the given co-ordinates are within the kinematic boundary. More...
void	getUpperHalf (Double_t &x, Double_t &y) const
	If only using the upper half of the (symmetric) DP then transform into the correct half. More...

Private Member Functions
	Lau2DAbsHistDP (const Lau2DAbsHistDP &rhs)
	Copy constructor - not implemented. More...
Lau2DAbsHistDP &	operator= (const Lau2DAbsHistDP &rhs)
	Copy assignment operator - not implemented. More...

Private Attributes
const LauKinematics *	kinematics_
	Kinematics used to check events are within DP boundary. More...
Bool_t	upperHalf_
	Boolean for using the upper half of DP. More...
Bool_t	squareDP_
	Boolean for using square DP variables. More...

Detailed Description

Abstract base class for defining a variation across a 2D DP based on a histogram.

Abstract base class for defining an unnormalised variation across a 2D DP based on a histogram. Contains helper methods to vary bin contents in the input histogram within uncertainties and scale the input histogram to match a given average value. The histogram can be defined in the conventional DP (m13Sq vs m23Sq) or in the square DP and the upper half can be used to describe symmetric DPs.

Definition at line 34 of file Lau2DAbsHistDP.hh.

Constructor & Destructor Documentation

Lau2DAbsHistDP::Lau2DAbsHistDP	(	const LauDaughters *	daughters,
		Bool_t	useUpperHalfOnly = kFALSE,
		Bool_t	squareDP = kFALSE
	)

Constructor.

Parameters

[in]	daughters	the daughter particles
[in]	useUpperHalfOnly	boolean flag to specify that the supplied histogram contains only the upper half of a symmetric DP
[in]	squareDP	boolean flag to specify whether the supplied histogram is in square DP coordinates

Definition at line 30 of file Lau2DAbsHistDP.cc.

Lau2DAbsHistDP::~Lau2DAbsHistDP ( )

virtual

Copy constructor.

Destructor

Definition at line 37 of file Lau2DAbsHistDP.cc.

Lau2DAbsHistDP::Lau2DAbsHistDP ( const Lau2DAbsHistDP &  rhs )

private

Copy constructor - not implemented.

Member Function Documentation

Double_t Lau2DAbsHistDP::computeAverageContents ( TH2 const *const  hist ) const

protected

Compute the average bin content for bins within the kinematic boundary.

This method just uses the raw bin contents with no interpolation

Parameters

[in,out]

hist

the histogram

Returns

the average value over the DP

Definition at line 72 of file Lau2DAbsHistDP.cc.

void Lau2DAbsHistDP::doBinFluctuation ( TH2 *  hist )

protected

Fluctuate the contents of each histogram bin independently, in accordance with their errors.

Parameters

[in,out]

hist

the histogram

Definition at line 41 of file Lau2DAbsHistDP.cc.

void Lau2DAbsHistDP::getUpperHalf ( Double_t &  x, Double_t &  y  ) const

protected

If only using the upper half of the (symmetric) DP then transform into the correct half.

Parameters

[in,out]	x	the x co-ordinate
[in,out]	y	the y co-ordinate

Definition at line 112 of file Lau2DAbsHistDP.cc.

virtual Double_t Lau2DAbsHistDP::interpolateXY ( Double_t  x, Double_t  y  ) const

pure virtual

Perform the interpolation.

Parameters

[in]	x	the x-axis value
[in]	y	the y-axis value

Returns

the interpolated histogram value

Implements Lau2DAbsDP.

Implemented in Lau2DHistDP, and Lau2DSplineDP.

Lau2DAbsHistDP& Lau2DAbsHistDP::operator= ( const Lau2DAbsHistDP &  rhs )

private

Copy assignment operator - not implemented.

void Lau2DAbsHistDP::raiseOrLowerBins ( TH2 *  hist, Double_t  avEff, Double_t  avEffError  )

protected

Rescale the histogram bin contents based on the desired average efficiency and its uncertainty.

The new average is sampled from a Gaussian distribution G(x;avEff,avEffError). The histogram is then rescaled according to newAvg/oldAvg.

Parameters

[in,out]	hist	the histogram
[in]	avEff	the desired average efficiency
[in]	avEffError	the error on that efficiency

Definition at line 62 of file Lau2DAbsHistDP.cc.

Bool_t Lau2DAbsHistDP::withinDPBoundaries ( Double_t  x, Double_t  y  ) const

protected

Check whether the given co-ordinates are within the kinematic boundary.

Parameters

[in]	x	the x co-ordinate
[in]	y	the y co-ordinate

Returns

true if the co-ordinates are within the kinematic boundary, otherwise false

Definition at line 107 of file Lau2DAbsHistDP.cc.

Member Data Documentation

const LauKinematics* Lau2DAbsHistDP::kinematics_

private

Kinematics used to check events are within DP boundary.

Definition at line 107 of file Lau2DAbsHistDP.hh.

Bool_t Lau2DAbsHistDP::squareDP_

private

Boolean for using square DP variables.

Definition at line 112 of file Lau2DAbsHistDP.hh.

Bool_t Lau2DAbsHistDP::upperHalf_

private

Boolean for using the upper half of DP.

Definition at line 110 of file Lau2DAbsHistDP.hh.

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

• inc/Lau2DAbsHistDP.hh
• src/Lau2DAbsHistDP.cc