recob::MCSFitResult Class Reference

Class storing the result of the Maximum Likelihood fit of Multiple Coulomb Scattering angles between segments within a Track or Trajectory. More...

#include "MCSFitResult.h"

Public Member Functions
	MCSFitResult ()=default
	MCSFitResult (int pid, float momFwd, float momFwdUnc, float llhdFwd, float momBwd, float momBwdUnc, float llhdBwd, const std::vector< float > &radlengths, const std::vector< float > &angles)
int	particleIdHyp () const
	particle id hypothesis used in the fit More...
float	fwdMomentum () const
	momentum value from fit assuming a forward track direction More...
float	fwdMomUncertainty () const
	momentum uncertainty from fit assuming a forward track direction More...
float	fwdLogLikelihood () const
	minimum negative log likelihood value from fit assuming a forward track direction More...
float	bwdMomentum () const
	momentum value from fit assuming a backward track direction More...
float	bwdMomUncertainty () const
	momentum uncertainty from fit assuming a backward track direction More...
float	bwdLogLikelihood () const
	minimum negative log likelihood value from fit assuming a backward track direction More...
const std::vector< float > &	segmentRadLengths () const
	vector of radiation lengths of the segments used in the fit More...
const std::vector< float > &	scatterAngles () const
	vector of angles between the segments used in the fit More...
bool	isBestFwd () const
	determines best fit direction based on minumum log likelihood between forward and backward fit More...
float	bestMomentum () const
	momentum for best direction fit More...
float	bestMomUncertainty () const
	momentum uncertainty for best direction fit More...
float	bestLogLikelihood () const
	negative log likelihood for best direction fit More...
float	deltaLogLikelihood () const
	difference in log likelihood between forward and backward fit (absolute value) More...

Private Attributes
int	pid_
	particle id hypothesis used in the fit More...
float	momFwd_
	momentum value from fit assuming a forward track direction More...
float	momFwdUnc_
	momentum uncertainty from fit assuming a forward track direction More...
float	llhdFwd_
	minimum negative log likelihood value from fit assuming a forward track direction More...
float	momBwd_
	momentum value from fit assuming a backward track direction More...
float	momBwdUnc_
	momentum uncertainty from fit assuming a backward track direction More...
float	llhdBwd_
	minimum negative log likelihood value from fit assuming a backward track direction More...
std::vector< float >	radlengths_
	vector of radiation lengths of the segments used in the fit More...
std::vector< float >	angles_
	vector of angles between the segments used in the fit More...

Detailed Description

Class storing the result of the Maximum Likelihood fit of Multiple Coulomb Scattering angles between segments within a Track or Trajectory.

Class storing the result of the Maximum Likelihood fit of Multiple Coulomb Scattering angles between segments within a Track or Trajectory. It stores: the resulting momentum, momentum uncertainty, and best likelihood value (both for fwd and bwd fit); the vectors of segment (radiation) lengths and of scattering angles; the PID hypothesis used in the fit.

Author

G. Cerati (FNAL, MicroBooNE)

Date

2017

Version

1.0

Definition at line 19 of file MCSFitResult.h.

Constructor & Destructor Documentation

recob::MCSFitResult::MCSFitResult ( )

default

recob::MCSFitResult::MCSFitResult ( int  pid, float  momFwd, float  momFwdUnc, float  llhdFwd, float  momBwd, float  momBwdUnc, float  llhdBwd, const std::vector< float > &  radlengths, const std::vector< float > &  angles  )

inline

Definition at line 22 of file MCSFitResult.h.

      : pid_(pid)
      , momFwd_(momFwd)
      , momFwdUnc_(momFwdUnc)
      , llhdFwd_(llhdFwd)
      , momBwd_(momBwd)
      , momBwdUnc_(momBwdUnc)
      , llhdBwd_(llhdBwd)
      , radlengths_(radlengths)
      , angles_(angles)
    {}

Member Function Documentation

float recob::MCSFitResult::bestLogLikelihood ( ) const

inline

negative log likelihood for best direction fit

Definition at line 79 of file MCSFitResult.h.

References isBestFwd(), llhdBwd_, and llhdFwd_.

{ return isBestFwd() ? llhdFwd_ : llhdBwd_; }

float recob::MCSFitResult::bestMomentum ( ) const

inline

momentum for best direction fit

Definition at line 73 of file MCSFitResult.h.

References isBestFwd(), momBwd_, and momFwd_.

Referenced by RecoProxyUsageExample::analyze().

{ return isBestFwd() ? momFwd_ : momBwd_; }

float recob::MCSFitResult::bestMomUncertainty ( ) const

inline

momentum uncertainty for best direction fit

Definition at line 76 of file MCSFitResult.h.

References isBestFwd(), momBwdUnc_, and momFwdUnc_.

{ return isBestFwd() ? momFwdUnc_ : momBwdUnc_; }

float recob::MCSFitResult::bwdLogLikelihood ( ) const

inline

minimum negative log likelihood value from fit assuming a backward track direction

Definition at line 61 of file MCSFitResult.h.

References llhdBwd_.

{ return llhdBwd_; }

float recob::MCSFitResult::bwdMomentum ( ) const

inline

momentum value from fit assuming a backward track direction

Definition at line 55 of file MCSFitResult.h.

References momBwd_.

{ return momBwd_; }

float recob::MCSFitResult::bwdMomUncertainty ( ) const

inline

momentum uncertainty from fit assuming a backward track direction

Definition at line 58 of file MCSFitResult.h.

References momBwdUnc_.

{ return momBwdUnc_; }

float recob::MCSFitResult::deltaLogLikelihood ( ) const

inline

difference in log likelihood between forward and backward fit (absolute value)

Definition at line 82 of file MCSFitResult.h.

References util::abs(), llhdBwd_, and llhdFwd_.

{ return std::abs(llhdFwd_ - llhdBwd_); }

float recob::MCSFitResult::fwdLogLikelihood ( ) const

inline

minimum negative log likelihood value from fit assuming a forward track direction

Definition at line 52 of file MCSFitResult.h.

References llhdFwd_.

{ return llhdFwd_; }

float recob::MCSFitResult::fwdMomentum ( ) const

inline

momentum value from fit assuming a forward track direction

Definition at line 46 of file MCSFitResult.h.

References momFwd_.

{ return momFwd_; }

float recob::MCSFitResult::fwdMomUncertainty ( ) const

inline

momentum uncertainty from fit assuming a forward track direction

Definition at line 49 of file MCSFitResult.h.

References momFwdUnc_.

{ return momFwdUnc_; }

bool recob::MCSFitResult::isBestFwd ( ) const

inline

determines best fit direction based on minumum log likelihood between forward and backward fit

Definition at line 70 of file MCSFitResult.h.

References llhdBwd_, and llhdFwd_.

Referenced by bestLogLikelihood(), bestMomentum(), and bestMomUncertainty().

{ return llhdFwd_ < llhdBwd_; }

int recob::MCSFitResult::particleIdHyp ( ) const

inline

particle id hypothesis used in the fit

Definition at line 43 of file MCSFitResult.h.

References pid_.

{ return pid_; }

const std::vector<float>& recob::MCSFitResult::scatterAngles ( ) const

inline

vector of angles between the segments used in the fit

Definition at line 67 of file MCSFitResult.h.

References angles_.

{ return angles_; }

const std::vector<float>& recob::MCSFitResult::segmentRadLengths ( ) const

inline

vector of radiation lengths of the segments used in the fit

Definition at line 64 of file MCSFitResult.h.

References radlengths_.

{ return radlengths_; }

Member Data Documentation

std::vector<float> recob::MCSFitResult::angles_

private

vector of angles between the segments used in the fit

Definition at line 95 of file MCSFitResult.h.

Referenced by scatterAngles().

float recob::MCSFitResult::llhdBwd_

private

minimum negative log likelihood value from fit assuming a backward track direction

Definition at line 93 of file MCSFitResult.h.

Referenced by bestLogLikelihood(), bwdLogLikelihood(), deltaLogLikelihood(), and isBestFwd().

float recob::MCSFitResult::llhdFwd_

private

minimum negative log likelihood value from fit assuming a forward track direction

Definition at line 89 of file MCSFitResult.h.

Referenced by bestLogLikelihood(), deltaLogLikelihood(), fwdLogLikelihood(), and isBestFwd().

float recob::MCSFitResult::momBwd_

private

momentum value from fit assuming a backward track direction

Definition at line 90 of file MCSFitResult.h.

Referenced by bestMomentum(), and bwdMomentum().

float recob::MCSFitResult::momBwdUnc_

private

momentum uncertainty from fit assuming a backward track direction

Definition at line 91 of file MCSFitResult.h.

Referenced by bestMomUncertainty(), and bwdMomUncertainty().

float recob::MCSFitResult::momFwd_

private

momentum value from fit assuming a forward track direction

Definition at line 86 of file MCSFitResult.h.

Referenced by bestMomentum(), and fwdMomentum().

float recob::MCSFitResult::momFwdUnc_

private

momentum uncertainty from fit assuming a forward track direction

Definition at line 87 of file MCSFitResult.h.

Referenced by bestMomUncertainty(), and fwdMomUncertainty().

int recob::MCSFitResult::pid_

private

particle id hypothesis used in the fit

Definition at line 85 of file MCSFitResult.h.

Referenced by particleIdHyp().

std::vector<float> recob::MCSFitResult::radlengths_

private

vector of radiation lengths of the segments used in the fit

Definition at line 94 of file MCSFitResult.h.

Referenced by segmentRadLengths().

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

• lardataobj/v09_18_03/source/lardataobj/RecoBase/MCSFitResult.h