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
virtual void	fitTGraphErrors (const TGraphErrors &graph, TF1 &fit) const throw (LogicError, MathsError)
	fit TGraphErrors
virtual void	fitTGraphAsymmErrors (const TGraphAsymmErrors &graph, TF1 &fit) const throw (LogicError, MathsError)
	fit TGraphAsymmErrors
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?
bool	quiet () const throw ()
	Fit in quiet mode?
Static Private Member Functions
static 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
static bool	inMap
	dummy variable used at static initialization.
Data Structures
class	Cache
	Interal class caches the information needed for the fit. More...

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.

Constructor & Destructor Documentation

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

constuctor

Definition at line 9 of file NagFitStrategy.cpp.

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

destructor

Definition at line 12 of file NagFitStrategy.cpp.

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

no copy constructor

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 266 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

Note:
errors set to unity

Implements SctFitter::FitStrategy.
Definition at line 31 of file NagFitStrategy.cpp.

void SctFitter::NagFitStrategy::fitTGraphAsymmErrors ( const TGraphAsymmErrors & graph,

TF1 & fit

) const throw (LogicError, MathsError) [virtual]

fit TGraphAsymmErrors

Implements SctFitter::FitStrategy.
Definition at line 55 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 43 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 16 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 144 of file NagFitStrategy.cpp.

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

Returns the name of the strategy.

Implements SctFitter::FitStrategy.
Definition at line 116 of file NagFitStrategy.cpp.
References name.

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 122 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.
make the Nag variables
Definition at line 67 of file NagFitStrategy.cpp.
References Sct::AbstractThrowable::sendToMrs().
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bool SctFitter::NagFitStrategy::quiet ( ) const throw () [private]

Fit in quiet mode?

Returns:
true if options contain 'Q' or 'q'

Definition at line 277 of file NagFitStrategy.cpp.
References SctFitter::FitStrategy::getOptions().
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bool SctFitter::NagFitStrategy::ranged ( ) const throw () [private]

Take range from TF1?

Returns:
true if options contain 'R' or 'r'

Definition at line 282 of file NagFitStrategy.cpp.
References SctFitter::FitStrategy::getOptions().
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Field Documentation

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

dummy variable used at static initialization.

Definition at line 45 of file NagFitStrategy.h.

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

the name of the strategy

Definition at line 44 of file NagFitStrategy.h.
Referenced by getName().

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

Generated on Mon Feb 6 14:09:53 2006 for SCT DAQ/DCS Software - C++ by

1.4.6

SctFitter::NagFitStrategy Class Reference

Public Member Functions

Private Member Functions

Static Private Member Functions

Private Attributes

Static Private Attributes

Data Structures

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Field Documentation