Lau1DHistPdf Class Reference

Class for defining a 1D histogram PDF. More...

#include <Lau1DHistPdf.hh>

Inheritance diagram for Lau1DHistPdf:

Public Member Functions
	Lau1DHistPdf (const TString &theVarName, const TH1 *hist, Double_t minAbscissa, Double_t maxAbscissa, Bool_t useInterpolation=kTRUE, Bool_t fluctuateBins=kFALSE)
	Constructor. More...
virtual	~Lau1DHistPdf ()
	Destructor. More...
	Lau1DHistPdf (const Lau1DHistPdf &other)
	Copy constructor. More...
virtual void	calcLikelihoodInfo (const LauAbscissas &abscissas)
	Calculate the likelihood (and intermediate info) for a given abscissa. More...
virtual void	calcNorm ()
	Calculate the normalisation. More...
virtual void	calcPDFHeight (const LauKinematics *kinematics)
	Calculate the PDF height. More...
Public Member Functions inherited from LauAbsPdf
	LauAbsPdf (const TString &theVarName, const std::vector< LauAbsRValue * > &params, Double_t minAbscissa, Double_t maxAbscissa)
	Constructor for a 1D PDF. More...
	LauAbsPdf (const std::vector< TString > &theVarNames, const std::vector< LauAbsRValue * > &params, const LauFitData &minAbscissas, const LauFitData &maxAbscissas)
	Constructor for a multidimensional PDF. More...
virtual	~LauAbsPdf ()
	Destructor. More...
virtual const TString &	varName () const
	Retrieve the name of the abscissa. More...
virtual std::vector< TString >	varNames () const
	Retrieve the names of the abscissas. More...
virtual UInt_t	nParameters () const
	Retrieve the number of PDF parameters. More...
virtual UInt_t	nFixedParameters () const
	Retrieve the number of fixed PDF parameters. More...
virtual UInt_t	nInputVars () const
	Retrieve the number of abscissas. More...
virtual Bool_t	isDPDependent () const
	Specifies whether or not the PDF is DP dependent. More...
virtual Double_t	getMinAbscissa () const
	Retrieve the minimum value of the (primary) abscissa. More...
virtual Double_t	getMaxAbscissa () const
	Retrieve the maximum value of the (primary) abscissa. More...
virtual Double_t	getRange () const
	Retrieve the range of the (primary) abscissa. More...
virtual Double_t	getMinAbscissa (const TString &theVarName) const
	Retrieve the minimum value of the specified abscissa. More...
virtual Double_t	getMaxAbscissa (const TString &theVarName) const
	Retrieve the maximum value of the specified abscissa. More...
virtual Double_t	getRange (const TString &theVarName) const
	Retrieve the range of the specified abscissa. More...
virtual LauFitData	getMinAbscissas () const
	Retrieve the minimum values of all the abscissas. More...
virtual LauFitData	getMaxAbscissas () const
	Retrieve the maximum values of all the abscissas. More...
virtual LauFitData	getRanges () const
	Retrieve the ranges of all the abscissas. More...
virtual void	updatePulls ()
	Update the pulls for all parameters. More...
virtual void	cacheInfo (const LauFitDataTree &inputData)
	Cache information from data. More...
virtual void	calcLikelihoodInfo (UInt_t iEvt)
	Retrieve the likelihood (and all associated information) given the event number. More...
virtual Double_t	getUnNormLikelihood () const
	Retrieve the unnormalised likelihood value. More...
virtual Double_t	getNorm () const
	Retrieve the normalisation factor. More...
virtual Double_t	getLikelihood () const
	Retrieve the normalised likelihood value. More...
virtual Double_t	getLikelihood (const TString &theVarName) const
	For multidimentional PDFs, retrieve the normalised likelihood value of a named variable. More...
virtual Double_t	getMaxHeight () const
	Retrieve the maximum height. More...
virtual LauFitData	generate (const LauKinematics *kinematics)
	Generate an event from the PDF. More...
virtual void	setRandomFun (TRandom *randomFun)
	Set the random function used for toy MC generation. More...
virtual const std::vector < LauAbsRValue * > &	getParameters () const
	Retrieve the parameters of the PDF, e.g. so that they can be loaded into a fit. More...
virtual std::vector < LauAbsRValue * > &	getParameters ()
	Retrieve the parameters of the PDF, e.g. so that they can be loaded into a fit. More...
virtual Bool_t	heightUpToDate () const
	Check if the maximum height of the PDF is up to date. More...
virtual Bool_t	cachePDF () const
	Check if the PDF is to be cached. More...
virtual Int_t	nNormPoints () const
	Retrieve the number of points to integrate over when normalising. More...
virtual void	nNormPoints (Int_t nPoints)
	Set the number of points to integrate over when normalising. More...
virtual IntMethod	integMethod () const
	Retrieve the integration method used to normalise the PDF. More...
virtual void	integMethod (IntMethod method)
	Set the integration method used to normalise the PDF. More...

Protected Member Functions
void	doBinFluctuation ()
	Fluctuate the histogram bin contents in accorance with their errors. More...
void	checkNormalisation ()
	Check the normalisation calculation. More...
Double_t	getBinHistValue (Int_t bin) const
	Get the bin content from the histogram. More...
Double_t	interpolate (Double_t x) const
	Perform the interpolation (unnormalised) More...
Double_t	interpolateNorm (Double_t x) const
	Perform the interpolation and divide by the normalisation. More...
Protected Member Functions inherited from LauAbsPdf
virtual void	cachePDF (Bool_t doCachePDF)
	Set whether the PDF is to be cached. More...
virtual void	heightUpToDate (Bool_t hutd)
	Set whether the height is up to date. More...
virtual Double_t	integrGaussLegendre ()
	Integrate the PDF using the Gauss-Legendre method. More...
virtual Double_t	integTrapezoid ()
	Integrate the PDF using the simple trapezoid method. More...
virtual void	setNorm (Double_t norm)
	Set the normalisation factor. More...
virtual void	setMaxHeight (Double_t maxHeight)
	Set the maximum height. More...
virtual void	setMinAbscissa (const TString &theVarName, Double_t minAbscissa)
	Set the minimum value of the specified abscissa. More...
virtual void	setMaxAbscissa (const TString &theVarName, Double_t maxAbscissa)
	Set the maximum value of the specified abscissa. More...
virtual void	setRange (const TString &theVarName, Double_t minAbscissa, Double_t maxAbscissa)
	Set the range of the specified abscissa. More...
virtual Bool_t	checkRange (const LauAbscissas &abscissas) const
	Check that all abscissas are within their allowed ranges. More...
virtual void	setUnNormPDFVal (Double_t unNormPDFVal)
	Set the unnormalised likelihood. More...
virtual LauAbsRValue *	findParameter (const TString &parName)
	Retrieve the specified parameter. More...
virtual const LauAbsRValue *	findParameter (const TString &parName) const
	Retrieve the specified parameter. More...
virtual TRandom *	getRandomFun () const
	Retrieve the random function used for MC generation. More...
virtual std::vector < LauAbscissas > &	getAbscissas ()
	Retrieve the abscissa(s) More...
virtual const std::vector < LauAbscissas > &	getAbscissas () const
	Retrieve the abscissa(s) More...
virtual std::vector< Double_t > &	getUnNormPDFValues ()
	Retrieve the cached unnormalised likelihood values. More...
virtual const std::vector < Double_t > &	getUnNormPDFValues () const
	Retrieve the cached unnormalised likelihood values. More...
virtual void	addParameters (std::vector< LauAbsRValue * > &params)
	Add parameters to the PDF. More...
virtual Bool_t	withinNormCalc () const
	Check whether the calcNorm method is running. More...
virtual void	withinNormCalc (Bool_t yorn)
	Set flag to track whether the calcNorm method is running. More...
virtual Bool_t	withinGeneration () const
	Check whether the generate method is running. More...
virtual void	withinGeneration (Bool_t yorn)
	Set flag to track whether the generate method is running. More...
virtual Bool_t	normWeightsDone () const
	Check whether the normalisation weights have been calculated. More...
virtual void	normWeightsDone (Bool_t yorn)
	Set whether the normalisation weights have been calculated. More...
virtual void	getNormWeights ()
	Calculate the weights and abscissas used for normalisation. More...
virtual const std::vector < LauAbscissas > &	normAbscissas () const
	Retrieve the abscissa points used for normalisation. More...
virtual const std::vector < Double_t > &	normWeights () const
	Retrieve the weights used for normalisation. More...

Private Attributes
TH1 *	hist_
	The underlying histogram. More...
Bool_t	useInterpolation_
	Control boolean for using the linear interpolation. More...
Bool_t	fluctuateBins_
	Control boolean for performing the fluctuation of the histogram bin contents. More...
Int_t	nBins_
	The number of bins in the histogram. More...
Double_t	axisMin_
	The histogram axis minimum. More...
Double_t	axisMax_
	The histogram axis maximum. More...
Double_t	axisRange_
	The histogram axis range. More...

Additional Inherited Members
Public Types inherited from LauAbsPdf
enum	IntMethod { GaussLegendre, Trapezoid }
	The possible numerical intergration methods. More...
typedef std::vector< Double_t >	LauAbscissas
	The type used for containing multiple abscissa values. More...

Detailed Description

Class for defining a 1D histogram PDF.

Class for defining a 1D histogram PDF. Employs linear interpolation to get the PDF value based on how far away a point is from nearby bin centres. The returned values are normalised to the total area.

Definition at line 31 of file Lau1DHistPdf.hh.

Constructor & Destructor Documentation

Lau1DHistPdf::Lau1DHistPdf	(	const TString &	theVarName,
		const TH1 *	hist,
		Double_t	minAbscissa,
		Double_t	maxAbscissa,
		Bool_t	useInterpolation = kTRUE,
		Bool_t	fluctuateBins = kFALSE
	)

Constructor.

Parameters

[in]	theVarName	the name of the abscissa variable
[in]	hist	the 1D histogram from which the PDF should be constructed
[in]	minAbscissa	the minimum value of the abscissa
[in]	maxAbscissa	the maximum value of the abscissa
[in]	useInterpolation	boolean flag to determine whether linear interpolation between bins should be used or simply the raw bin values
[in]	fluctuateBins	boolean flag to determine whether the bin contents should be fluctuated in accordance with their errors. The seed for the random number generator used to fluctuate the bins should first be set using LauRandom::setSeed.

Definition at line 32 of file Lau1DHistPdf.cc.

Lau1DHistPdf::~Lau1DHistPdf ( )

virtual

Destructor.

Definition at line 80 of file Lau1DHistPdf.cc.

Lau1DHistPdf::Lau1DHistPdf

(

const Lau1DHistPdf &

other

)

Copy constructor.

Definition at line 86 of file Lau1DHistPdf.cc.

Member Function Documentation

void Lau1DHistPdf::calcLikelihoodInfo ( const LauAbscissas &  abscissas )

virtual

Calculate the likelihood (and intermediate info) for a given abscissa.

Parameters

[in]

abscissas

the values of the abscissa(s)

Implements LauAbsPdf.

Definition at line 172 of file Lau1DHistPdf.cc.

void Lau1DHistPdf::calcNorm ( )

virtual

Calculate the normalisation.

Reimplemented from LauAbsPdf.

Definition at line 107 of file Lau1DHistPdf.cc.

void Lau1DHistPdf::calcPDFHeight ( const LauKinematics *  kinematics )

virtual

Calculate the PDF height.

Parameters

[in]

kinematics

the current DP kinematics (not strictly required in this case since PDF has no DP dependence)

Implements LauAbsPdf.

Definition at line 95 of file Lau1DHistPdf.cc.

void Lau1DHistPdf::checkNormalisation ( )

protected

Check the normalisation calculation.

Definition at line 128 of file Lau1DHistPdf.cc.

void Lau1DHistPdf::doBinFluctuation ( )

protected

Fluctuate the histogram bin contents in accorance with their errors.

Definition at line 246 of file Lau1DHistPdf.cc.

Double_t Lau1DHistPdf::getBinHistValue ( Int_t  bin ) const

protected

Get the bin content from the histogram.

Parameters

[in]

bin

the bin number

Returns

the bin content

Definition at line 149 of file Lau1DHistPdf.cc.

Double_t Lau1DHistPdf::interpolate ( Double_t  x ) const

protected

Perform the interpolation (unnormalised)

Parameters

[in]

x

the abscissa value

Returns

the unnormalised PDF value

Definition at line 187 of file Lau1DHistPdf.cc.

Double_t Lau1DHistPdf::interpolateNorm ( Double_t  x ) const

protected

Perform the interpolation and divide by the normalisation.

Parameters

[in]

x

the abscissa value

Returns

the normalised PDF value

Definition at line 164 of file Lau1DHistPdf.cc.

Member Data Documentation

Double_t Lau1DHistPdf::axisMax_

private

The histogram axis maximum.

Definition at line 112 of file Lau1DHistPdf.hh.

Double_t Lau1DHistPdf::axisMin_

private

The histogram axis minimum.

Definition at line 110 of file Lau1DHistPdf.hh.

Double_t Lau1DHistPdf::axisRange_

private

The histogram axis range.

Definition at line 114 of file Lau1DHistPdf.hh.

Bool_t Lau1DHistPdf::fluctuateBins_

private

Control boolean for performing the fluctuation of the histogram bin contents.

Definition at line 105 of file Lau1DHistPdf.hh.

TH1* Lau1DHistPdf::hist_

private

The underlying histogram.

Definition at line 100 of file Lau1DHistPdf.hh.

Int_t Lau1DHistPdf::nBins_

private

The number of bins in the histogram.

Definition at line 108 of file Lau1DHistPdf.hh.

Bool_t Lau1DHistPdf::useInterpolation_

private

Control boolean for using the linear interpolation.

Definition at line 103 of file Lau1DHistPdf.hh.

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

• inc/Lau1DHistPdf.hh
• src/Lau1DHistPdf.cc