RooImproperIntegrator1D Class Reference

Special numeric integrator that can handle integrals over open domains.

To this end the range is cut in up three pieces: [-inf,-1],[-1,+1] and [+1,inf] and the outer two pieces, if required are calculated using a 1/x transform

Definition at line 25 of file RooImproperIntegrator1D.h.

Public Member Functions
	RooImproperIntegrator1D (const RooAbsFunc &function)
	Constructor with function binding.
	RooImproperIntegrator1D (const RooAbsFunc &function, const RooNumIntConfig &config)
	Constructor with function binding and configuration object.
	RooImproperIntegrator1D (const RooAbsFunc &function, double xmin, double xmax, const RooNumIntConfig &config)
	Constructor with function binding, definition of integration range and configuration object.
bool	checkLimits () const override
	Check if the limits are valid.
double	integral (const double *yvec=nullptr) override
	Calculate the integral at the given parameter values of the function binding.
virtual bool	setLimits (double *, double *)
bool	setLimits (double *xmin, double *xmax) override
	Change our integration limits.
virtual bool	setLimits (double xmin, double xmax)
	Interface to set limits on integration.
bool	setUseIntegrandLimits (bool flag) override
	Interface function that allows to defer limit definition to integrand definition.
Public Member Functions inherited from RooAbsIntegrator
	RooAbsIntegrator ()
	RooAbsIntegrator (const RooAbsFunc &function, bool printEvalCounter=false)
	Copy constructor.
virtual	~RooAbsIntegrator ()=default
double	calculate (const double *yvec=nullptr)
	Calculate integral value with given array of parameter values.
const RooAbsFunc *	integrand () const
	Return integrand function binding.
double	integrand (const double x[]) const
	Return value of integrand at given observable values.
bool	isValid () const
	Is integrator in valid state.
bool	printEvalCounter () const
void	setPrintEvalCounter (bool value)

Protected Types
enum	LimitsCase {   Invalid , ClosedBothEnds , OpenBothEnds , OpenBelowSpansZero ,   OpenBelow , OpenAboveSpansZero , OpenAbove }

Protected Member Functions
void	initialize (const RooAbsFunc *function=nullptr)
	Initialize the integrator, construct and initialize subintegrators.
LimitsCase	limitsCase () const
	Classify the type of limits we have: OpenBothEnds,ClosedBothEnds,OpenBelow or OpenAbove.

Static Protected Member Functions
static void	registerIntegrator (RooNumIntFactory &fact)
	Register RooImproperIntegrator1D, its parameters and capabilities with RooNumIntFactory.

Protected Attributes
LimitsCase	_case
	Configuration of limits.
RooNumIntConfig	_config
	Configuration object.
std::unique_ptr< RooInvTransform >	_function
	Binding with inverse of function.
std::unique_ptr< RooRombergIntegrator >	_integrator1
	Piece integrator 1.
std::unique_ptr< RooRombergIntegrator >	_integrator2
	Piece integrator 2.
std::unique_ptr< RooRombergIntegrator >	_integrator3
	Piece integrator 3.
RooAbsFunc *	_origFunc = nullptr
	Original function binding.
bool	_useIntegrandLimits
	Use limits in function binding?
double	_xmax
	Value of limits.
double	_xmin
Protected Attributes inherited from RooAbsIntegrator
const RooAbsFunc *	_function = nullptr
	Pointer to function binding of integrand.
bool	_printEvalCounter = false
	If true print number of function evaluation required for integration.
bool	_valid = false
	Is integrator in valid state?

Friends
class	RooNumIntFactory

#include </home/sftnight/build/workspace/root-makedoc-master/rootspi/rdoc/src/master/roofit/roofitcore/src/RooImproperIntegrator1D.h>

Inheritance diagram for RooImproperIntegrator1D:

Member Enumeration Documentation

LimitsCase

enum RooImproperIntegrator1D::LimitsCase

protected

Enumerator
Invalid
ClosedBothEnds
OpenBothEnds
OpenBelowSpansZero
OpenBelow
OpenAboveSpansZero
OpenAbove

Definition at line 47 of file RooImproperIntegrator1D.h.

Constructor & Destructor Documentation

RooImproperIntegrator1D() [1/3]

RooImproperIntegrator1D::RooImproperIntegrator1D

(

const RooAbsFunc &

function

)

Constructor with function binding.

The integration range is taken from the definition in the function binding

Definition at line 65 of file RooImproperIntegrator1D.cxx.

RooImproperIntegrator1D() [2/3]

RooImproperIntegrator1D::RooImproperIntegrator1D	(	const RooAbsFunc &	function,
		const RooNumIntConfig &	config
	)

Constructor with function binding and configuration object.

The integration range is taken from the definition in the function binding

Definition at line 79 of file RooImproperIntegrator1D.cxx.

RooImproperIntegrator1D() [3/3]

RooImproperIntegrator1D::RooImproperIntegrator1D	(	const RooAbsFunc &	function,
		double	xmin,
		double	xmax,
		const RooNumIntConfig &	config
	)

Constructor with function binding, definition of integration range and configuration object.

Definition at line 93 of file RooImproperIntegrator1D.cxx.

Member Function Documentation

checkLimits()

bool RooImproperIntegrator1D::checkLimits ( ) const

overridevirtual

Check if the limits are valid.

For this integrator all limit configurations are valid, but if the limits change between two calculate() calls it may be necessary to reconfigure (e.g. if an open ended range becomes a closed range

Reimplemented from RooAbsIntegrator.

Definition at line 199 of file RooImproperIntegrator1D.cxx.

initialize()

void RooImproperIntegrator1D::initialize ( const RooAbsFunc *  function = nullptr )

protected

Initialize the integrator, construct and initialize subintegrators.

Definition at line 109 of file RooImproperIntegrator1D.cxx.

integral()

double RooImproperIntegrator1D::integral ( const double *  yvec = nullptr )

overridevirtual

Calculate the integral at the given parameter values of the function binding.

Implements RooAbsIntegrator.

Definition at line 288 of file RooImproperIntegrator1D.cxx.

limitsCase()

RooImproperIntegrator1D::LimitsCase RooImproperIntegrator1D::limitsCase ( ) const

protected

Classify the type of limits we have: OpenBothEnds,ClosedBothEnds,OpenBelow or OpenAbove.

Definition at line 245 of file RooImproperIntegrator1D.cxx.

registerIntegrator()

void RooImproperIntegrator1D::registerIntegrator ( RooNumIntFactory &  fact )

staticprotected

Register RooImproperIntegrator1D, its parameters and capabilities with RooNumIntFactory.

Definition at line 46 of file RooImproperIntegrator1D.cxx.

setLimits() [1/3]

virtual bool RooAbsIntegrator::setLimits ( double *  , double *    )

inlinevirtual

Reimplemented from RooAbsIntegrator.

Definition at line 54 of file RooAbsIntegrator.h.

setLimits() [2/3]

bool RooImproperIntegrator1D::setLimits ( double *  xmin, double *  xmax  )

overridevirtual

Change our integration limits.

Return true if the new limits are ok, or otherwise false. Always returns false and does nothing if this object was constructed to always use our integrand's limits.

Reimplemented from RooAbsIntegrator.

Definition at line 180 of file RooImproperIntegrator1D.cxx.

setLimits() [3/3]

bool RooAbsIntegrator::setLimits ( double  xmin, double  xmax  )

virtual

Interface to set limits on integration.

Reimplemented from RooAbsIntegrator.

Definition at line 55 of file RooAbsIntegrator.cxx.

setUseIntegrandLimits()

bool RooImproperIntegrator1D::setUseIntegrandLimits ( bool  flag )

inlineoverridevirtual

Interface function that allows to defer limit definition to integrand definition.

Reimplemented from RooAbsIntegrator.

Definition at line 34 of file RooImproperIntegrator1D.h.

Friends And Related Symbol Documentation

RooNumIntFactory

friend class RooNumIntFactory

friend

Definition at line 42 of file RooImproperIntegrator1D.h.

Member Data Documentation

_case

LimitsCase RooImproperIntegrator1D::_case

protected

Configuration of limits.

Definition at line 57 of file RooImproperIntegrator1D.h.

_config

RooNumIntConfig RooImproperIntegrator1D::_config

protected

Configuration object.

Definition at line 63 of file RooImproperIntegrator1D.h.

_function

std::unique_ptr<RooInvTransform> RooImproperIntegrator1D::_function

protected

Binding with inverse of function.

Definition at line 62 of file RooImproperIntegrator1D.h.

_integrator1

std::unique_ptr<RooRombergIntegrator> RooImproperIntegrator1D::_integrator1

mutableprotected

Piece integrator 1.

Definition at line 64 of file RooImproperIntegrator1D.h.

_integrator2

std::unique_ptr<RooRombergIntegrator> RooImproperIntegrator1D::_integrator2

mutableprotected

Piece integrator 2.

Definition at line 65 of file RooImproperIntegrator1D.h.

_integrator3

std::unique_ptr<RooRombergIntegrator> RooImproperIntegrator1D::_integrator3

mutableprotected

Piece integrator 3.

Definition at line 66 of file RooImproperIntegrator1D.h.

_origFunc

RooAbsFunc* RooImproperIntegrator1D::_origFunc = nullptr

protected

Original function binding.

Definition at line 61 of file RooImproperIntegrator1D.h.

_useIntegrandLimits

bool RooImproperIntegrator1D::_useIntegrandLimits

protected

Use limits in function binding?

Definition at line 59 of file RooImproperIntegrator1D.h.

_xmax

double RooImproperIntegrator1D::_xmax

protected

Value of limits.

Definition at line 58 of file RooImproperIntegrator1D.h.

_xmin

double RooImproperIntegrator1D::_xmin

mutableprotected

Definition at line 58 of file RooImproperIntegrator1D.h.