LHAPDF::KnotArray Class Reference

Internal storage class for PDF data point grids. More...

#include <KnotArray.h>

Public Member Functions
size_t	size () const
	How many flavours are stored in the grid.
size_t	numflavs () const
	How many flavours are stored in the grid.
size_t	xsize () const
	How many x knots are there.
size_t	q2size () const
	How many q2 knots are there.
bool	empty () const
	Is this container empty?
size_t	ixbelow (double x) const
	Find the largest grid index below given x, such that xknots[index] < x.
size_t	iq2below (double q2) const
	Find the largest grid index below given q2, such that q2knots[index] < q2.
double	xf (int ix, int iq2, int ipid) const
	Convenient accessor to the grid values.
const double &	coeff (int ix, int iq2, int pid, int in) const
	Convenient accessor to the polynomial coefficients.
int	lookUpPid (size_t id) const
	Accessor to the internal 'lookup table' for the pid's.
double	xs (size_t id) const
	Set of x knots.
double	logxs (size_t id) const
	Set of log10(x) knots.
double	q2s (size_t id) const
	Set of Q2 knots.
double	logq2s (size_t id) const
	Set of log10(Q2) knots.
size_t	shape (size_t id) const
	Shape of the interpolation grid.
bool	inRangeX (double x) const
	Check if value within the boundaries of xknots.
bool	inRangeQ2 (double q2) const
	Check if value within the boundaries of q2knots.
int	get_pid (int id) const
bool	has_pid (int id) const
void	initPidLookup ()
void	fillLogKnots ()
Const accessors to the internal data container
const std::vector< double > &	xs () const
const std::vector< double > &	logxs () const
const std::vector< double > &	q2s () const
const std::vector< double > &	logq2s () const
Non const accessors for programmatic filling
std::vector< double > &	setCoeffs ()
std::vector< double > &	setGrid ()
std::vector< double > &	setxknots ()
std::vector< double > &	setq2knots ()
std::vector< size_t > &	setShape ()
std::vector< int > &	setPids ()

Private Attributes
std::vector< size_t >	_shape
	Shape of the interpolation grid.
std::vector< double >	_grid
	Grid values.
std::vector< double >	_coeffs
	Storage for the precomputed polynomial coefficients.
std::vector< int >	_pids
	Order the PIDs are filled in.
std::vector< int >	_lookup
Knots
std::vector< double >	_xs
std::vector< double >	_q2s
std::vector< double >	_logxs
std::vector< double >	_logq2s

Detailed Description

Internal storage class for PDF data point grids.

We use "array" to refer to the "raw" knot grid, while "grid" means a grid-based PDF.

Member Function Documentation

coeff()

const double & LHAPDF::KnotArray::coeff ( int ix, int iq2, int pid, int in ) const

inline

Convenient accessor to the polynomial coefficients.

Note

Returns reference rather than value, to be able to read multiple adjacent coeffs at once.

fillLogKnots()

void LHAPDF::KnotArray::fillLogKnots

(

)

Todo

Document

get_pid()

int LHAPDF::KnotArray::get_pid ( int id ) const

inline

Todo

Document and normalise naming style

has_pid()

bool LHAPDF::KnotArray::has_pid ( int id ) const

inline

Todo

Document and normalise naming style

initPidLookup()

void LHAPDF::KnotArray::initPidLookup

(

)

Todo

Document and normalise naming style

shape()

size_t LHAPDF::KnotArray::shape ( size_t id ) const

inline

Shape of the interpolation grid.

Todo

Document/explain better!

Member Data Documentation

_shape

std::vector<size_t> LHAPDF::KnotArray::_shape

private

Shape of the interpolation grid.

Todo

Explain/document better!

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

• /builds/hepcedar/lhapdf/include/LHAPDF/KnotArray.h