find maximum and minimum of a QMathFunction, the minimum search stops when |a - b| < epsabs + epsrel min(|a|,|b|) More...

Public Member Functions
	QMinimizer ()
	constructor More...

	~QMinimizer ()
	destructor More...

void	SetVerbose ()
	verbose (print iteration steps) More...

double	GetMinimum (QMathFunction func, double minx, double maxx, double epsabs=0.001, double epsrel=0.0)
	get function minimum More...

double	GetMaximum (QMathFunction func, double minx, double maxx, double epsabs=0.001, double epsrel=0.0)
	get function maximum More...

Static Private Member Functions
static double	MinusFunc (double x, double *params)
	pointer to mins this function, (to find maximum with the minimum algorithm) More...

Private Attributes
gsl_min_fminimizer *	fMinimizer
	underlying gsl minimizer More...

bool	fVerbose
	verbose More...

Static Private Attributes
static QMathFunction::QRoutinePointer	fCurrentFunction
	pointer to current function being minimized More...

Detailed Description

find maximum and minimum of a QMathFunction, the minimum search stops when |a - b| < epsabs + epsrel min(|a|,|b|)

Author: Marco Vignati

Definition at line 19 of file QMinimizer.hh.

Constructor & Destructor Documentation

◆ QMinimizer()

QMinimizer::QMinimizer ( )

constructor

Definition at line 9 of file QMinimizer.cc.

References fMinimizer, and fVerbose.

◆ ~QMinimizer()

QMinimizer::~QMinimizer ( )

destructor

Definition at line 17 of file QMinimizer.cc.

Member Function Documentation

◆ GetMaximum()

double QMinimizer::GetMaximum	(	QMathFunction	func,
		double	minx,
		double	maxx,
		double	epsabs = `0.001`,
		double	epsrel = `0.0`
	)

get function maximum

Parameters

func	the function
max	f(x_max)
maxpos	x_max
epsabs	absolute precision
epsrel	relative precision

Definition at line 70 of file QMinimizer.cc.

References fCurrentFunction, QMathFunction::fRoutine, GetMinimum(), and MinusFunc().

Referenced by QMathFunction::GetMaximum().

◆ GetMinimum()

double QMinimizer::GetMinimum	(	QMathFunction	func,
		double	minx,
		double	maxx,
		double	epsabs = `0.001`,
		double	epsrel = `0.0`
	)

get function minimum

Parameters

func	the function
min	f(x_min)
minpos	x_min
epsabs	absolute precision
epsrel	relative precision

Definition at line 22 of file QMinimizer.cc.

References fMinimizer, fVerbose, QMathFunction::GetGSLFunction(), min(), and Q_DOUBLE_DEFAULT.

Referenced by GetMaximum(), and QMathFunction::GetMinimum().

◆ MinusFunc()

double QMinimizer::MinusFunc	(	double	x,
		double *	params
	)

staticprivate

pointer to mins this function, (to find maximum with the minimum algorithm)

Definition at line 65 of file QMinimizer.cc.

Referenced by GetMaximum().

◆ SetVerbose()

void QMinimizer::SetVerbose ( )

inline

verbose (print iteration steps)

Definition at line 27 of file QMinimizer.hh.

References fVerbose.

Referenced by QMathFunction::GetMaximum(), and QMathFunction::GetMinimum().

Member Data Documentation

◆ fCurrentFunction

Q_BEGIN_NAMESPACE QMathFunction::QRoutinePointer QMinimizer::fCurrentFunction

staticprivate

pointer to current function being minimized

Definition at line 49 of file QMinimizer.hh.

Referenced by GetMaximum().

◆ fMinimizer

gsl_min_fminimizer* QMinimizer::fMinimizer

private

underlying gsl minimizer

Definition at line 54 of file QMinimizer.hh.

Referenced by GetMinimum(), and QMinimizer().

◆ fVerbose

bool QMinimizer::fVerbose

private

verbose

Definition at line 56 of file QMinimizer.hh.

Referenced by GetMinimum(), QMinimizer(), and SetVerbose().

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

pkg/coretools/QMinimizer.hh
pkg/coretools/QMinimizer.cc

Public Member Functions

Static Private Member Functions

Private Attributes

Static Private Attributes