The general interface for interpolating between grid points. More...

#include <Interpolator.h>

Inheritance diagram for LHAPDF::Interpolator:

Public Member Functions
virtual	~Interpolator ()
	Destructor to allow inheritance.

std::string	type () const

void	setType (std::string t)
	Set the interpolation type.

Binding to a PDF object
void	bind (const GridPDF *pdf)
	Bind to a GridPDF.

void	unbind ()
	Unbind from GridPDF.

bool	hasPDF ()
	Identify whether this Interpolator has an associated PDF.

const GridPDF &	pdf () const
	Get the associated GridPDF.

Interpolation methods
double	interpolateXQ (int id, double x, double q) const
	Interpolate a single-point in (x,Q)

double	interpolateXQ2 (int id, double x, double q2) const
	Interpolate a single-point in (x,Q2)

void	interpolateXQ2 (double x, double q2, std::vector< double > &ret) const

Protected Member Functions
virtual double	_interpolateXQ2 (const KnotArray &grid, double x, size_t ix, double q2, size_t iq2, int id) const =0
	Interpolate a single-point in (x,Q2), given x/Q2 values and subgrid indices. More...

virtual void	_interpolateXQ2 (const KnotArray &grid, double x, size_t ix, double q2, size_t iq2, std::vector< double > &ret) const
	Interpolate a single-point in (x,Q2), given x/Q2 values and subgrid indices, for all 11 standard flavours at once. More...

Private Attributes
const GridPDF *	_pdf

std::string	_type

Detailed Description

The general interface for interpolating between grid points.

Member Function Documentation

◆ _interpolateXQ2() [1/2]

virtual double LHAPDF::Interpolator::_interpolateXQ2	(	const KnotArray &	grid,
		double	x,
		size_t	ix,
		double	q2,
		size_t	iq2,
		int	id
	)		const

protectedpure virtual

Interpolate a single-point in (x,Q2), given x/Q2 values and subgrid indices.

The key function to be overridden in derived classes: the subgrid and x/Q2 index lookup (and their caching) are done centrally in the Interpolator base class so do not need to be re-implemented in each flavour of interpolator.

Implemented in LHAPDF::LogBicubicInterpolator, LHAPDF::BicubicInterpolator, LHAPDF::BilinearInterpolator, and LHAPDF::LogBilinearInterpolator.

◆ _interpolateXQ2() [2/2]

virtual void LHAPDF::Interpolator::_interpolateXQ2	(	const KnotArray &	grid,
		double	x,
		size_t	ix,
		double	q2,
		size_t	iq2,
		std::vector< double > &	ret
	)		const

inlineprotectedvirtual

Interpolate a single-point in (x,Q2), given x/Q2 values and subgrid indices, for all 11 standard flavours at once.

This can be overridden in derived classes for a more CPU-efficient implementation than the default looping over all flavours: often the grid coefficients for the point can be efficiently reused for each flavour.

Reimplemented in LHAPDF::LogBicubicInterpolator, LHAPDF::BicubicInterpolator, LHAPDF::BilinearInterpolator, and LHAPDF::LogBilinearInterpolator.

◆ type()

std::string LHAPDF::Interpolator::type ( ) const

inline

Todo:: Make an all-PID version of interpolateQ and Q2?

The name of this type of interpolator

Todo:: Would name() or scheme() be a better name? "Type" maybe confuses with the language type-system

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

/builddir/build/BUILD/LHAPDF-6.5.6/include/LHAPDF/Interpolator.h

Public Member Functions

Protected Member Functions

Private Attributes

Detailed Description

Member Function Documentation

◆ _interpolateXQ2() [1/2]

◆ _interpolateXQ2() [2/2]

◆ type()