GammaNumericalGenerator Class Reference

#include <GammaNumericalGenerator.h>

Inheritance diagram for GammaNumericalGenerator:

List of all members.

Public Member Functions
virtual double	function (double x)
	The probability density function implementation.
double	gamma () const
	Random generator.
double	gamma_exp () const
double	gamma_lin () const
	GammaNumericalGenerator (const RandomEngine *engine, double a=0, double b=0, double x1=0, double x2=0)
	Constructor : initialization of the Random Generator.
bool	isValid () const
virtual	~GammaNumericalGenerator ()
	Default destructor.
Private Member Functions
double	ersatzt (double x)
	Gamma Function.
Private Attributes
double	a_
double	b_
bool	valid

---

Detailed Description

Definition at line 12 of file GammaNumericalGenerator.h.

---

Constructor & Destructor Documentation

GammaNumericalGenerator::GammaNumericalGenerator	(	const RandomEngine *	engine,
		double	a = 0,
		double	b = 0,
		double	x1 = 0,
		double	x2 = 0
	)		[inline]

Constructor : initialization of the Random Generator.

Definition at line 17 of file GammaNumericalGenerator.h.

References a, b, BaseNumericalRandomGenerator::initialize(), and valid.

                                                                          : 
     BaseNumericalRandomGenerator(engine,x1,x2,1000),
     a_(a),b_(b),valid(false) {

    if(a>0&&b>0) 
      {
        valid=true;
        initialize();
      }
  }

virtual GammaNumericalGenerator::~GammaNumericalGenerator

(

)

[inline, virtual]

Default destructor.

Definition at line 30 of file GammaNumericalGenerator.h.

{}

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Member Function Documentation

double GammaNumericalGenerator::ersatzt

(

double

x

)

[inline, private]

Gamma Function.

Definition at line 47 of file GammaNumericalGenerator.h.

References a_, b_, funct::exp(), funct::pow(), and ExpressReco_HICollisions_FallBack::x.

Referenced by function().

                           { 
    double bt=b_*x;
    return  b_*pow(bt,a_-1)*exp(-bt);
  }

virtual double GammaNumericalGenerator::function

(

double

x

)

[inline, virtual]

The probability density function implementation.

Implements BaseNumericalRandomGenerator.

Definition at line 40 of file GammaNumericalGenerator.h.

References ersatzt().

{ return ersatzt(x); }

double GammaNumericalGenerator::gamma

(

)

const [inline]

Random generator.

Definition at line 33 of file GammaNumericalGenerator.h.

References BaseNumericalRandomGenerator::generate().

{ return generate(); }

double GammaNumericalGenerator::gamma_exp

(

)

const [inline]

Definition at line 35 of file GammaNumericalGenerator.h.

References BaseNumericalRandomGenerator::generateExp().

{return generateExp();}

double GammaNumericalGenerator::gamma_lin

(

)

const [inline]

Definition at line 37 of file GammaNumericalGenerator.h.

References BaseNumericalRandomGenerator::generateLin().

{return generateLin();}

bool GammaNumericalGenerator::isValid

(

void

)

const [inline]

Definition at line 42 of file GammaNumericalGenerator.h.

References valid.

{return valid;}

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Member Data Documentation

double GammaNumericalGenerator::a_ [private]

Definition at line 53 of file GammaNumericalGenerator.h.

Referenced by ersatzt().

double GammaNumericalGenerator::b_ [private]

Definition at line 53 of file GammaNumericalGenerator.h.

Referenced by ersatzt().

bool GammaNumericalGenerator::valid [private]

Definition at line 54 of file GammaNumericalGenerator.h.

Referenced by GammaNumericalGenerator(), and isValid().