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 62 of file MCSFitResult.h.

{ return isBestFwd() ? llhdFwd_   : llhdBwd_;  }

float recob::MCSFitResult::bestMomentum ( ) const

inline

momentum for best direction fit

Definition at line 56 of file MCSFitResult.h.

{ return isBestFwd() ? momFwd_    : momBwd_;   }

float recob::MCSFitResult::bestMomUncertainty ( ) const

inline

momentum uncertainty for best direction fit

Definition at line 59 of file MCSFitResult.h.

{ 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 44 of file MCSFitResult.h.

{ return llhdBwd_;  }

float recob::MCSFitResult::bwdMomentum ( ) const

inline

momentum value from fit assuming a backward track direction

Definition at line 38 of file MCSFitResult.h.

{ return momBwd_;   }

float recob::MCSFitResult::bwdMomUncertainty ( ) const

inline

momentum uncertainty from fit assuming a backward track direction

Definition at line 41 of file MCSFitResult.h.

{ return momBwdUnc_;}

float recob::MCSFitResult::deltaLogLikelihood ( ) const

inline

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

Definition at line 65 of file MCSFitResult.h.

{ 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 35 of file MCSFitResult.h.

{ return llhdFwd_;  }

float recob::MCSFitResult::fwdMomentum ( ) const

inline

momentum value from fit assuming a forward track direction

Definition at line 29 of file MCSFitResult.h.

{ return momFwd_;   }

float recob::MCSFitResult::fwdMomUncertainty ( ) const

inline

momentum uncertainty from fit assuming a forward track direction

Definition at line 32 of file MCSFitResult.h.

{ 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 53 of file MCSFitResult.h.

{ return llhdFwd_<llhdBwd_;                    }

int recob::MCSFitResult::particleIdHyp ( ) const

inline

particle id hypothesis used in the fit

Definition at line 26 of file MCSFitResult.h.

{ return pid_;   }

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

inline

vector of angles between the segments used in the fit

Definition at line 50 of file MCSFitResult.h.

{ 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 47 of file MCSFitResult.h.

{ 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 76 of file MCSFitResult.h.

float recob::MCSFitResult::llhdBwd_

private

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

Definition at line 74 of file MCSFitResult.h.

float recob::MCSFitResult::llhdFwd_

private

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

Definition at line 71 of file MCSFitResult.h.

float recob::MCSFitResult::momBwd_

private

momentum value from fit assuming a backward track direction

Definition at line 72 of file MCSFitResult.h.

float recob::MCSFitResult::momBwdUnc_

private

momentum uncertainty from fit assuming a backward track direction

Definition at line 73 of file MCSFitResult.h.

float recob::MCSFitResult::momFwd_

private

momentum value from fit assuming a forward track direction

Definition at line 69 of file MCSFitResult.h.

float recob::MCSFitResult::momFwdUnc_

private

momentum uncertainty from fit assuming a forward track direction

Definition at line 70 of file MCSFitResult.h.

int recob::MCSFitResult::pid_

private

particle id hypothesis used in the fit

Definition at line 68 of file MCSFitResult.h.

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

private

vector of radiation lengths of the segments used in the fit

Definition at line 75 of file MCSFitResult.h.

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

• MCSFitResult.h