SctFitter::NagFitStrategy Class Reference

Concrete fit strategy uses the NAG C function e04fcc "Unconstrained nonlinear least squares (no derivatives required)". More...

#include <NagFitStrategy.h>

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Public Member Functions
	NagFitStrategy (string opt=string("")) throw ()
	constuctor
	~NagFitStrategy () throw ()
	destructor
virtual void	fitTH1 (const TH1 &hist, TF1 &fit) const throw (LogicError, MathsError)
	http://wwwasd.web.cern.ch/wwwasd/lhc++/Nag_C/CL/doc/e/e04fcc.html
virtual void	fitTGraph (const TGraph &graph, TF1 &fit) const throw (LogicError, MathsError)
	fit TGraph errors set to unity
virtual void	fitTGraphErrors (const TGraphErrors &graph, TF1 &fit) const throw (LogicError, MathsError)
	fit TGraphErrors
virtual const string &	getName () const throw ()
	Returns the name of the strategy.
Private Member Functions
	NagFitStrategy (const NagFitStrategy &)
	no copy constructor
const int	getNumberFitPoints (TH1 &hist, const TF1 &fit, int &iFirstBin) const throw (LogicError)
	utility routine
void	getFitPoints (TGraph &graph, const TF1 &fit, vector< bool > &active) const throw (LogicError)
	utility routine finds active points in graph
void	nagFit (Cache *cache, TF1 &fit, bool quiet) const throw (MathsError)
	contains the NAG calls etc - the guts of the fit.
bool	ranged () const throw ()
	Take range from TF1? true if options contain 'R' or 'r'.
bool	quiet () const throw ()
	Fit in quiet mode? true if options contain 'Q' or 'q'.
Static Private Member Functions
void	chiSquaredFunctionForNag (Integer m, Integer n, double x[], double fvec[], Nag_Comm *comm) throw ()
	NB set up cache first!
Private Attributes
const string	name
	the name of the strategy
Static Private Attributes
bool	inMap
	dummy variable used at static initialization.

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Detailed Description

Concrete fit strategy uses the NAG C function e04fcc "Unconstrained nonlinear least squares (no derivatives required)".

At the time of writing, CERN licences are available to CERN collaborators from the ANAPHE site: http://anaphe.web.cern.ch/anaphe/download2.html

To use NagFitStrategy, define NAGDIR, and rebuild.

Author:

Alan Barr

Date:

16/5/03

Definition at line 25 of file NagFitStrategy.h.

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Constructor & Destructor Documentation

SctFitter::NagFitStrategy::NagFitStrategy (  string  opt = string("")  )  throw ()

constuctor Definition at line 8 of file NagFitStrategy.cpp.

SctFitter::NagFitStrategy::~NagFitStrategy (   )  throw ()

destructor Definition at line 11 of file NagFitStrategy.cpp.

SctFitter::NagFitStrategy::NagFitStrategy (  const NagFitStrategy &   )  [private]

no copy constructor

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Member Function Documentation

void SctFitter::NagFitStrategy::chiSquaredFunctionForNag (  Integer  m, Integer  n, double  x[], double  fvec[], Nag_Comm *  comm )  throw () [static, private]

NB set up cache first! Definition at line 235 of file NagFitStrategy.cpp. References SctFitter::NagFitStrategy::Cache::convertPars(), SctFitter::NagFitStrategy::Cache::function, SctFitter::NagFitStrategy::Cache::m_ey, SctFitter::NagFitStrategy::Cache::m_x, SctFitter::NagFitStrategy::Cache::m_y, and SctFitter::NagFitStrategy::Cache::pars.

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void SctFitter::NagFitStrategy::fitTGraph (  const TGraph &  graph, TF1 &  fit )  const throw (LogicError, MathsError) [virtual]

fit TGraph errors set to unity Implements SctFitter::FitStrategy. Definition at line 30 of file NagFitStrategy.cpp.

void SctFitter::NagFitStrategy::fitTGraphErrors (  const TGraphErrors &  graph, TF1 &  fit )  const throw (LogicError, MathsError) [virtual]

fit TGraphErrors Implements SctFitter::FitStrategy. Definition at line 42 of file NagFitStrategy.cpp.

void SctFitter::NagFitStrategy::fitTH1 (  const TH1 &  hist, TF1 &  fit )  const throw (LogicError, MathsError) [virtual]

http://wwwasd.web.cern.ch/wwwasd/lhc++/Nag_C/CL/doc/e/e04fcc.html need to do this because ROOT hist.Fit() isn't const! Implements SctFitter::FitStrategy. Definition at line 15 of file NagFitStrategy.cpp.

void SctFitter::NagFitStrategy::getFitPoints (  TGraph &  graph, const TF1 &  fit, vector< bool > &  active )  const throw (LogicError) [private]

utility routine finds active points in graph Parameters: graph  the graph of points fit  the fit from which the range is taken the  vector of bools saying which points in the graph to fit. Note: if options does not contain 'R' whole histogram is used. Definition at line 131 of file NagFitStrategy.cpp.

const string & SctFitter::NagFitStrategy::getName (   )  const throw () [virtual]

Returns the name of the strategy. Implements SctFitter::FitStrategy. Definition at line 103 of file NagFitStrategy.cpp.

const int SctFitter::NagFitStrategy::getNumberFitPoints (  TH1 &  hist, const TF1 &  fit, int &  iFirstBin )  const throw (LogicError) [private]

utility routine Returns: the number of points to fit number of active bins Parameters: histogram  (from which bin positions used) fit  function (from which limits found) returns  with the first bin from which to fit Note: if options does not contain 'R' whole histogram is used. Definition at line 109 of file NagFitStrategy.cpp.

void SctFitter::NagFitStrategy::nagFit (  Cache *  cache, TF1 &  fit, bool  quiet )  const throw (MathsError) [private]

contains the NAG calls etc - the guts of the fit. Definition at line 54 of file NagFitStrategy.cpp. References SctFitter::NagFitStrategy::Cache::m_x, and Sct::AbstractThrowable::sendToMrs().

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bool SctFitter::NagFitStrategy::quiet (   )  const throw () [private]

Fit in quiet mode? true if options contain 'Q' or 'q'. Definition at line 246 of file NagFitStrategy.cpp.

bool SctFitter::NagFitStrategy::ranged (   )  const throw () [private]

Take range from TF1? true if options contain 'R' or 'r'. Definition at line 251 of file NagFitStrategy.cpp.

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Field Documentation

bool SctFitter::NagFitStrategy::inMap [static, private]

dummy variable used at static initialization. Definition at line 107 of file NagFitStrategy.cpp.

const string SctFitter::NagFitStrategy::name [private]

the name of the strategy Definition at line 42 of file NagFitStrategy.h.

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

• NagFitStrategy.h
• NagFitStrategy.cpp

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