Lau2DSplineDP Class Reference

Class for defining variations across a 2D DP using a spline. More...

#include <Lau2DSplineDP.hh>

Inheritance diagram for Lau2DSplineDP:

Public Member Functions
	Lau2DSplineDP (const TH2 *hist, const LauDaughters *daughters, Bool_t fluctuateBins=kFALSE, Double_t avEff=-1.0, Double_t avEffError=-1.0, Bool_t useUpperHalfOnly=kFALSE, Bool_t squareDP=kFALSE)
	Constructor. More...
virtual	~Lau2DSplineDP ()
	Destructor. More...
Double_t	interpolateXY (Double_t x, Double_t y) const
	Perform the interpolation. More...
Public Member Functions inherited from Lau2DAbsHistDP
	Lau2DAbsHistDP (const LauDaughters *daughters, Bool_t useUpperHalfOnly=kFALSE, Bool_t squareDP=kFALSE)
	Constructor. More...
virtual	~Lau2DAbsHistDP ()
	Copy constructor. More...
Public Member Functions inherited from Lau2DAbsDP
	Lau2DAbsDP ()
	Constructor. More...
virtual	~Lau2DAbsDP ()
	Destructor. More...

Private Member Functions
	Lau2DSplineDP (const Lau2DSplineDP &rhs)
	Copy constructor - not implemented. More...
Lau2DSplineDP &	operator= (const Lau2DSplineDP &rhs)
	Copy assignment operator - not implemented. More...

Private Attributes
Lau2DCubicSpline *	spline_
	A 2D cubic spline generated from the histogram. More...

Additional Inherited Members
Protected Member Functions inherited from Lau2DAbsHistDP
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...

Detailed Description

Class for defining variations across a 2D DP using a spline.

Class for defining variations across a 2D DP using a spline. Employs a 2D cubic spline to get the histogram value based on an input histogram. The returned values are not normalised to the total histogram area (useful for efficiency histograms for example). The histogram can be defined in the conventional DP (m13Sq vs m23Sq) or in the square DP.

Definition at line 35 of file Lau2DSplineDP.hh.

Constructor & Destructor Documentation

Lau2DSplineDP::Lau2DSplineDP	(	const TH2 *	hist,
		const LauDaughters *	daughters,
		Bool_t	fluctuateBins = kFALSE,
		Double_t	avEff = -1.0,
		Double_t	avEffError = -1.0,
		Bool_t	useUpperHalfOnly = kFALSE,
		Bool_t	squareDP = kFALSE
	)

Constructor.

Parameters

[in]	hist	the 2D DP histogram
[in]	daughters	the daughter particles
[in]	fluctuateBins	boolean flag to determine whether the bin contents should be fluctuated in accordance with their errors (useful for systematic error evaluation). The seed for the random number generator used to fluctuate the bins should first be set using LauRandom::setSeed.
[in]	avEff	the desired average efficiency - see Lau2DSplineDP::raiseOrLowerBins. The seed for the random number generator used to raise or lower the bins should first be set using LauRandom::setSeed.
[in]	avEffError	the error on that efficiency - see Lau2DSplineDP::raiseOrLowerBins
[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 31 of file Lau2DSplineDP.cc.

Lau2DSplineDP::~Lau2DSplineDP ( )

virtual

Destructor.

Definition at line 57 of file Lau2DSplineDP.cc.

Lau2DSplineDP::Lau2DSplineDP ( const Lau2DSplineDP &  rhs )

private

Copy constructor - not implemented.

Member Function Documentation

Double_t Lau2DSplineDP::interpolateXY ( Double_t  x, Double_t  y  ) const

virtual

Perform the interpolation.

Parameters

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

Returns

the interpolated histogram value

Implements Lau2DAbsHistDP.

Definition at line 63 of file Lau2DSplineDP.cc.

Lau2DSplineDP& Lau2DSplineDP::operator= ( const Lau2DSplineDP &  rhs )

private

Copy assignment operator - not implemented.

Member Data Documentation

Lau2DCubicSpline* Lau2DSplineDP::spline_

private

A 2D cubic spline generated from the histogram.

Definition at line 73 of file Lau2DSplineDP.hh.

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

• inc/Lau2DSplineDP.hh
• src/Lau2DSplineDP.cc