LHAPDF Namespace Reference

Namespace for all LHAPDF functions and classes. More...

Classes
class	AlphaS
	Calculator interface for computing alpha_s(Q2) in various ways. More...
class	AlphaS_Analytic
	Calculate alpha_s(Q2) by an analytic approximation. More...
class	AlphaS_Ipol
class	AlphaS_ODE
	Solve the differential equation in alphaS using an implementation of RK4. More...
class	BicubicInterpolator
	Implementation of bicubic interpolation. More...
class	BilinearInterpolator
	Implementation of bilinear interpolation. More...
class	Config
	Class for PDF set metadata and manipulation. More...
class	ContinuationExtrapolator
class	ErrExtrapolator
	Extrapolates using the closest point on the Grid. More...
class	Exception
	Generic unspecialised LHAPDF runtime error. More...
class	GridError
	Error for general PDF grid problems. More...
class	RangeError
	Error to be thrown when out of the valid range of a PDF. More...
class	LogicError
	Error for places where it should not have been possible to get to! More...
class	MetadataError
	Error for unfound or broken metadata entries. More...
class	ReadError
	Error for file reading errors. More...
class	FlavorError
	Error for requests for unsupported/invalid flavour PIDs. More...
class	FactoryError
	Error to be raised by object factories given invalid requests. More...
class	IndexError
	Error to be raised when a LHAPDF ID indexing fails. More...
class	AlphaSError
	Error for general AlphaS computation problems. More...
class	VersionError
	Error to be raised when a newer LHAPDF version is needed. More...
class	UserError
	Problem exists between keyboard and chair. More...
class	NotImplementedError
	This feature doesn't exist yet. More...
class	Extrapolator
	The general interface for extrapolating beyond grid boundaries. More...
class	File
	MPI-safe file I/O interface. More...
class	GridPDF
	A PDF defined via an interpolation grid. More...
class	Info
	Metadata base class for PDFs, PDF sets, or global configuration. More...
class	Interpolator
	The general interface for interpolating between grid points. More...
class	KnotArray
	Internal storage class for PDF data point grids. More...
class	AlphaSArray
	Internal storage class for alpha_s interpolation grids. More...
class	LogBicubicInterpolator
	Implementation of bicubic interpolation. More...
class	LogBilinearInterpolator
	Implementation of bilinear interpolation. More...
class	NearestPointExtrapolator
	Extrapolates using the closest point on the Grid. More...
class	PDF
	PDF is the general interface for access to parton density information. More...
class	PDFInfo
	Metadata class for PDF members. More...
struct	PDFUncertainty
	Structure for storage of uncertainty info calculated over a PDF error set. More...
struct	PDFErrInfo
	Structure encoding the structure of the PDF error-set. More...
class	PDFSet
	Class for PDF-set metadata and manipulation. More...
struct	bad_lexical_cast
	When lexical_cast goes bad. More...

Functions
int	verbosity ()
void	setVerbosity (int v)
PDF *	mkPDF (const std::string &setname, size_t member)
PDF *	mkPDF (int lhaid)
PDF *	mkPDF (const std::string &setname_nmem)
PDFSet &	getPDFSet (const std::string &setname)
void	mkPDFs (const std::string &setname, std::vector< PDF * > &pdfs)
	Get all PDFs in a named set (return by filling the supplied vector).
std::vector< PDF * >	mkPDFs (const std::string &setname)
	Get all PDFs in a named set (return by a new vector).
template<typename PTR >
void	mkPDFs (const std::string &setname, std::vector< PTR > &pdfs)
Info &	getConfig ()
PDFInfo *	mkPDFInfo (const std::string &setname, size_t member)
PDFInfo *	mkPDFInfo (int lhaid)
PDFInfo *	mkPDFInfo (const std::string &setname_nmem)
Interpolator *	mkInterpolator (const std::string &name)
Extrapolator *	mkExtrapolator (const std::string &name)
AlphaS *	mkAlphaS (const Info &info)
	Make an AlphaS object from an Info object. More...
AlphaS *	mkAlphaS (const std::string &setname, size_t member)
	Make an AlphaS object for the specified PDF. More...
AlphaS *	mkAlphaS (int lhaid)
	Make an AlphaS object for the specified PDF. More...
AlphaS *	mkAlphaS (const std::string &setname_nmem)
AlphaS *	mkBareAlphaS (const std::string &type)
	Make an AlphaS object of the requested type without a PDF reference. More...
void	flushFileCache ()
	Global function to flush the MPI-safe file cache.
std::map< int, std::string > &	getPDFIndex ()
	Get the singleton LHAPDF set ID -> PDF index map.
std::pair< std::string, int >	lookupPDF (int lhaid)
std::pair< std::string, int >	lookupPDF (const std::string &pdfstr)
	Decode a single PDF member ID string into a setname,memid pair. More...
int	lookupLHAPDFID (const std::string &setname, int nmem)
int	lookupLHAPDFID (const std::string &setname_nmem)
	Look up the member's LHAPDF index from a setname/member string.
double	weightxQ2 (int id, double x, double Q2, const PDF &basepdf, const PDF &newpdf, double aschk=5e-2)
template<typename PDFPTR >
double	weightxQ2 (int id, double x, double Q2, const PDFPTR basepdf, const PDFPTR newpdf, double aschk=5e-2)
double	weightxQ (int id, double x, double Q, const PDF &basepdf, const PDF &newpdf, double aschk=5e-2)
template<typename PDFPTR >
double	weightxQ (int id, double x, double Q, const PDFPTR basepdf, const PDFPTR newpdf, double aschk=5e-2)
double	weightxxQ2 (int id1, int id2, double x1, double x2, double Q2, const PDF &basepdf, const PDF &newpdf, double aschk=5e-2)
template<typename PDFPTR >
double	weightxxQ2 (int id1, int id2, double x1, double x2, double Q2, const PDFPTR basepdf, const PDFPTR newpdf, double aschk=5e-2)
double	weightxxQ (int id1, int id2, double x1, double x2, double Q, const PDF &basepdf, const PDF &newpdf, double aschk=5e-2)
template<typename PDFPTR >
double	weightxxQ (int id1, int id2, double x1, double x2, double Q, const PDFPTR basepdf, const PDFPTR newpdf, double aschk=5e-2)
std::string	version ()
	Get the LHAPDF library version code (as a string)
Search path handling functions
std::vector< std::string >	paths ()
	Get the ordered list of search paths, from $LHAPDF_DATA_PATH and the install location. More...
void	setPaths (const std::string &pathstr)
	Set the search paths list as a colon-separated string.
void	setPaths (std::vector< string > paths)
	Set the search paths list.
void	pathsPrepend (const std::string &p)
	Prepend to the search paths list.
void	pathsAppend (const std::string &p)
	Append to the search paths list.
std::string	findFile (const std::string &target)
std::vector< std::string >	findFiles (const std::string &target)
	Return all locations in which a file is found.
PDF-specific path functions
std::string	pdfmempath (const std::string &setname, int member)
	Build the form of a PDF member-data file path relative to the search dir.
std::string	findpdfmempath (const std::string &setname, int member)
	Find a PDF member-data file path in the search paths.
std::string	pdfsetinfopath (const std::string &setname)
	Build the form of a PDF info file path relative to the search dir.
std::string	findpdfsetinfopath (const std::string &setname)
	Find a PDF info file path in the search paths. More...
const std::vector< std::string > &	availablePDFSets ()
	Get the names of all available PDF sets in the search path. More...
String handling utility functions
template<typename T , typename U >
T	lexical_cast (const U &in)
	Convert between types via stringstream.
template<typename T >
std::string	to_str (const T &val)
	Make a string representation of val.
template<typename T >
std::string	to_str (const std::vector< T > &vec)
	Make a string representation of a vector vec.
std::string	to_str_zeropad (int val, size_t nchars=4)
	Format an integer val as a zero-padded string of length nchars.
std::string	join (const std::vector< std::string > &svec, const std::string &sep)
	Concatenate strings with separator strings between each element.
std::vector< std::string >	split (const std::string &s, const std::string &sep)
	Split a string by a given separator.
bool	contains (const std::string &s, const std::string &sub)
	Does a string s contain the sub substring?
bool	startswith (const std::string &s, const std::string &sub)
	Does a string s start with the sub substring?
bool	endswith (const std::string &s, const std::string &sub)
	Does a string s end with the sub substring?
size_t	countchar (const std::string &s, const char c)
	How many times does a string s contain the character c?
std::string	trim (const std::string &s)
	Strip leading and trailing spaces (not in-place)
std::string	to_lower (const std::string &s)
	Convert a string to lower-case (not in-place)
std::string	to_upper (const std::string &s)
	Convert a string to upper-case (not in-place)
Filesystem utils
bool	path_exists (const std::string &p, int mode=0)
	Check if a path p (either file or dir) exists.
bool	file_exists (const std::string &p, int mode=0)
	Check if a file p exists.
bool	dir_exists (const std::string &p, int mode=0)
	Check if a dir p exists.
std::string	operator/ (const std::string &a, const std::string &b)
	Operator for joining strings a and b with filesystem separators.
std::string	basename (const std::string &p)
	Get the basename (i.e. terminal file name) from a path p.
std::string	dirname (const std::string &p)
	Get the dirname (i.e. path to the penultimate directory) from a path p.
std::string	file_stem (const std::string &f)
	Get the stem (i.e. part without a file extension) from a filename f.
std::string	file_extn (const std::string &f)
	Get the file extension from a filename f.
Math functions
Todo: Add an abspath(p) function
template<typename N >
N	sqr (const N &x)
	Convenience function for squaring (of any type)
template<typename N >
int	sgn (N val)
	Get the sign of a number.
int	in_range (double x, double low, double high)
	Check if a number is in a range (closed-open)
int	in_closed_range (double x, double low, double high)
	Check if a number is in a range (closed-closed)
int	in_open_range (double x, double low, double high)
	Check if a number is in a range (open-open)
double	norm_quantile (double p)
	Quantiles of the standard normal probability distribution function. More...
double	chisquared_quantile (double p, double ndf)
	Quantiles of the chi-squared probability distribution function.
Container utils
template<typename T >
bool	contains (const std::vector< T > &container, const T &item)
	Does the vector<T> container contain item?
template<typename K , typename T >
bool	has_key (const std::map< K, T > &container, const K &key)
	Does the map<K,T> container have a key K key?

Variables
const double	CL1SIGMA = 100*erf(1/sqrt(2))
	CL percentage for a Gaussian 1-sigma.

Detailed Description

Namespace for all LHAPDF functions and classes.