JFIT::JRegressor< JLine3Z, JSimplex > Struct Reference

Regressor function object for JLine3Z fit using JSimplex minimiser. More...

#include <JLine3ZRegressor.hh>

Inheritance diagram for JFIT::JRegressor< JLine3Z, JSimplex >:

Public Types
typedef JSimplex< JLine3Z >	minimiser_type
typedef JRegressor< JLine3Z, JSimplex >	regressor_type
typedef minimiser_type::result_type	result_type

Public Member Functions
	JRegressor (double sigma)
	Constructor.
template<class JHit_t >
double	operator() (const JLine3Z &track, const JHit_t &hit) const
	Fit function.
result_type	operator() (const JLine3Z &value, T __begin, T __end)
	Global fit.

Public Attributes
std::shared_ptr< JMEstimator >	estimator
	M-Estimator function.
double	sigma
	Time resolution [ns].

Detailed Description

Regressor function object for JLine3Z fit using JSimplex minimiser.

Definition at line 54 of file JLine3ZRegressor.hh.

Member Typedef Documentation

minimiser_type

typedef JSimplex <JLine3Z > JFIT::JAbstractRegressor< JLine3Z , JSimplex >::minimiser_type

inherited

Definition at line 80 of file JRegressor.hh.

regressor_type

typedef JRegressor<JLine3Z , JSimplex > JFIT::JAbstractRegressor< JLine3Z , JSimplex >::regressor_type

inherited

Definition at line 81 of file JRegressor.hh.

result_type

typedef minimiser_type::result_type JFIT::JAbstractRegressor< JLine3Z , JSimplex >::result_type

inherited

Definition at line 82 of file JRegressor.hh.

Constructor & Destructor Documentation

JRegressor()

JFIT::JRegressor< JLine3Z, JSimplex >::JRegressor ( double sigma )

inline

Constructor.

Parameters

sigma

time resolution of hit [ns]

Definition at line 64 of file JLine3ZRegressor.hh.

                             :
      estimator(new JMEstimatorNormal())
    {
      this->sigma = sigma;
    }

Member Function Documentation

operator()() [1/2]

template<class JHit_t >

double JFIT::JRegressor< JLine3Z, JSimplex >::operator() ( const JLine3Z & track, const JHit_t & hit ) const

inline

Fit function.

This method is used to determine the chi2 of given hit with respect to trajectory of muon.

The template argument JHit_t refers to a data structure which should have the following member methods:

• double getX(); // [m]
• double getY(); // [m]
• double getZ(); // [m]
• double getT(); // [ns]

Parameters

track	track
hit	hit

Returns

chi2

Definition at line 86 of file JLine3ZRegressor.hh.

    {
      using namespace JPP;
 
      JPosition3D D(hit.getX(), hit.getY(), hit.getZ());
 
      D.sub(track.getPosition());
 
      const double z  = D.getDot(track.getDirection());
      const double R  = sqrt(D.getLengthSquared() - z*z);
 
      const double t1 = track.getT() + (z + R * getKappaC()) * getInverseSpeedOfLight();
 
      const double u  = (t1 - hit.getT()) / sigma;
 
      return estimator->getRho(u) * hit.getW();
    }

operator()() [2/2]

result_type JFIT::JAbstractRegressor< JLine3Z , JSimplex >::operator() ( const JLine3Z & value, T __begin, T __end )

inlineinherited

Global fit.

Parameters

value	start value
__begin	begin of data set
__end	end of data set

Returns

chi2

Definition at line 94 of file JRegressor.hh.

Member Data Documentation

estimator

std::shared_ptr<JMEstimator> JFIT::JRegressor< JLine3Z, JSimplex >::estimator

M-Estimator function.

Definition at line 104 of file JLine3ZRegressor.hh.

sigma

double JFIT::JRegressor< JLine3Z, JSimplex >::sigma

Time resolution [ns].

Definition at line 105 of file JLine3ZRegressor.hh.

---

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

• JLine3ZRegressor.hh