JROOT::m_value Struct Reference

Data point for value with error. More...

#include <JRootfit.hh>

Public Member Functions
	m_value ()
	Default constructor.
	m_value (const double value, const double error)
	Constructor.
double	getRho (const double z) const
	Get chi2.
double	getPsi (const double z) const
	Get derivative of chi2.

Public Attributes
double	value
	value
double	error
	error

Detailed Description

Data point for value with error.

Definition at line 127 of file JRootfit.hh.

Constructor & Destructor Documentation

m_value() [1/2]

JROOT::m_value::m_value ( )

inline

Default constructor.

Definition at line 131 of file JRootfit.hh.

              :
      value(0.0),
      error(0.0)
    {}

m_value() [2/2]

JROOT::m_value::m_value ( const double value, const double error )

inline

Constructor.

Parameters

value	value
error	error

Definition at line 143 of file JRootfit.hh.

                                :
      value(value),
      error (error)
    {}

Member Function Documentation

getRho()

double JROOT::m_value::getRho ( const double z ) const

inline

Get chi2.

Parameters

z	expectation value

Returns

chi2

Definition at line 156 of file JRootfit.hh.

    {
      const double u = (value - z) / error;
 
      return u*u;
    }

getPsi()

double JROOT::m_value::getPsi ( const double z ) const

inline

Get derivative of chi2.

Parameters

z	expectation value

Returns

derivative of chi2

Definition at line 170 of file JRootfit.hh.

    {
      const double u = (value - z) / error;
 
      return -0.5 * u / error;
    }

Member Data Documentation

value

double JROOT::m_value::value

value

Definition at line 178 of file JRootfit.hh.

error

double JROOT::m_value::error

error

Definition at line 179 of file JRootfit.hh.

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The documentation for this struct was generated from the following file:

• JRootfit.hh