GammaDistributionFitter Class Reference [Math]

Implements a fitter for the Gamma distribution. More...

#include <OpenMS/MATH/STATISTICS/GammaDistributionFitter.h>

List of all members.

Classes
struct	GammaDistributionFitResult
	struct to represent the parameters of a gamma distribution More...
Public Member Functions
	GammaDistributionFitter ()
	Default constructor.
virtual	~GammaDistributionFitter ()
	Destructor.
void	setInitialParameters (const GammaDistributionFitResult &result)
	sets the gamma distribution start parameters b and p for the fitting
GammaDistributionFitResult	fit (std::vector< DPosition< 2 > > &points)
	Fits a gamma distribution to the given data points.
const String &	getGnuplotFormula () const
	returns the gnuplot formula of the fitted gamma distribution
Protected Member Functions
void	printState_ (size_t iter, gsl_multifit_fdfsolver *s)
Static Protected Member Functions
static int	gammaDistributionFitterf_ (const gsl_vector *x, void *params, gsl_vector *f)
static int	gammaDistributionFitterdf_ (const gsl_vector *x, void *params, gsl_matrix *J)
static int	gammaDistributionFitterfdf_ (const gsl_vector *x, void *params, gsl_vector *f, gsl_matrix *J)
Protected Attributes
GammaDistributionFitResult	init_param_
String	gnuplot_formula_
Private Member Functions
	GammaDistributionFitter (const GammaDistributionFitter &rhs)
	Copy constructor (not implemented).
GammaDistributionFitter &	operator= (const GammaDistributionFitter &rhs)
	assignment operator (not implemented)

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Detailed Description

Implements a fitter for the Gamma distribution.

This class fits a Gamma distribution to a number of data points. The results as well as the initial guess are specified using the struct GammaDistributionFitResult.

The formula with the fitted parameters can be transformed into a gnuplot formula using getGnuplotFormulai() after fitting.

The implementation is done using GSL fitting algorithms.

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Constructor & Destructor Documentation

GammaDistributionFitter

(

)

Default constructor.

virtual ~GammaDistributionFitter

(

)

[virtual]

Destructor.

GammaDistributionFitter

(

const GammaDistributionFitter &

rhs

)

[private]

Copy constructor (not implemented).

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Member Function Documentation

GammaDistributionFitResult fit

(

std::vector< DPosition< 2 > > &

points

)

Fits a gamma distribution to the given data points.

Parameters:

points

Input parameter which represents the point used for the fitting

Exceptions:

Exception::UnableToFit

is thrown if fitting cannot be performed

static int gammaDistributionFitterdf_	(	const gsl_vector *	x,
		void *	params,
		gsl_matrix *	J
	)			[static, protected]

static int gammaDistributionFitterf_	(	const gsl_vector *	x,
		void *	params,
		gsl_vector *	f
	)			[static, protected]

static int gammaDistributionFitterfdf_	(	const gsl_vector *	x,
		void *	params,
		gsl_vector *	f,
		gsl_matrix *	J
	)			[static, protected]

const String& getGnuplotFormula

(

)

const

returns the gnuplot formula of the fitted gamma distribution

GammaDistributionFitter& operator=

(

const GammaDistributionFitter &

rhs

)

[private]

assignment operator (not implemented)

void printState_	(	size_t	iter,
		gsl_multifit_fdfsolver *	s
	)			[protected]

void setInitialParameters

(

const GammaDistributionFitResult &

result

)

sets the gamma distribution start parameters b and p for the fitting

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Member Data Documentation

String gnuplot_formula_ [protected]

GammaDistributionFitResult init_param_ [protected]