GammaDistributionFitter Class Reference

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

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

Collaboration diagram for GammaDistributionFitter:

Classes
struct	GammaDistributionFitResult
	struct to represent the parameters of a gamma distribution More...

Public Member Functions
	GammaDistributionFitter ()
	Default constructor. More...
virtual	~GammaDistributionFitter ()
	Destructor. More...
void	setInitialParameters (const GammaDistributionFitResult &result)
	sets the gamma distribution start parameters b and p for the fitting More...
GammaDistributionFitResult	fit (const std::vector< DPosition< 2 > > &points)
	Fits a gamma distribution to the given data points. More...

Protected Attributes
GammaDistributionFitResult	init_param_

Private Member Functions
	GammaDistributionFitter (const GammaDistributionFitter &rhs)
	Copy constructor (not implemented to prevent usage) More...
GammaDistributionFitter &	operator= (const GammaDistributionFitter &rhs)
	assignment operator (not implemented to prevent usage) More...

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.

Note

We actually fit a slightly customized version of the gamma distribution that is 0.0 if the parameters b or p are <= 0.0. With this modification we can still use an unconstrained optimization algorithm.

Constructor & Destructor Documentation

GammaDistributionFitter() [1/2]

GammaDistributionFitter

(

)

Default constructor.

~GammaDistributionFitter()

virtual ~GammaDistributionFitter ( )

virtual

Destructor.

GammaDistributionFitter() [2/2]

GammaDistributionFitter ( const GammaDistributionFitter &  rhs )

private

Copy constructor (not implemented to prevent usage)

Member Function Documentation

fit()

GammaDistributionFitResult fit

(

const 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

operator=()

GammaDistributionFitter& operator= ( const GammaDistributionFitter &  rhs )

private

assignment operator (not implemented to prevent usage)

setInitialParameters()

void setInitialParameters

(

const GammaDistributionFitResult &

result

)

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

Member Data Documentation

init_param_

GammaDistributionFitResult init_param_

protected