opdet::FlashUtilities Class Reference

#include "FlashUtilities.h"

Public Member Functions
	FlashUtilities ()
float	CompareByError (const FlashHypothesis &, const std::vector< float > &, std::vector< float > &)
float	CompareByFraction (const FlashHypothesis &, const std::vector< float > &, std::vector< float > &)
float	CompareByFraction (const std::vector< float > &, const std::vector< float > &, std::vector< float > &)
void	GetPosition (const std::vector< float > &, const std::vector< float > &, float &, float &)
void	GetPosition (const std::vector< float > &, const std::vector< float > &, double &, double &)

Detailed Description

Definition at line 21 of file FlashUtilities.h.

Constructor & Destructor Documentation

opdet::FlashUtilities::FlashUtilities ( )

inline

Definition at line 25 of file FlashUtilities.h.

References CompareByError(), CompareByFraction(), and GetPosition().

{}

Member Function Documentation

float opdet::FlashUtilities::CompareByError	(	const FlashHypothesis &	fh,
		const std::vector< float > &	compare_vector,
		std::vector< float > &	result_vector
	)

Title: FlashUtilities Class Author: Wes Ketchum (wketc.nosp@m.hum@.nosp@m.lanl..nosp@m.gov)

Description: Class that contains utility functions for flash and flash hypotheses: — compare a flash hypothesis to a truth or reco vector — get an extent of a flash (central point, width) These classes should operate using simple objects, and will need other classes/functions to fill those vectors properly.

Definition at line 20 of file FlashUtilities.cxx.

References opdet::FlashHypothesis::GetHypothesisErrorVector(), opdet::FlashHypothesis::GetHypothesisVector(), opdet::FlashHypothesis::GetTotalPEs(), opdet::FlashHypothesis::GetTotalPEsError(), and opdet::FlashHypothesis::GetVectorSize().

Referenced by opdet::FlashHypothesisComparison::FillComparisonInfo(), and FlashUtilities().

{
  if(compare_vector.size()!=fh.GetVectorSize())
    throw std::runtime_error("ERROR in FlashUtilities Compare: Mismatching vector sizes.");

  result_vector.resize(fh.GetVectorSize());

  float result_total = 0;

  std::vector<float> const& NPEs_Vector(fh.GetHypothesisVector());
  std::vector<float> const& NPEs_ErrorVector(fh.GetHypothesisErrorVector());

  for(size_t i=0; i<fh.GetVectorSize(); i++){
    result_total += compare_vector[i];
    float diff = NPEs_Vector[i]-compare_vector[i];
    if( std::abs(diff)<std::numeric_limits<float>::epsilon())
      result_vector[i]=0;
    else if(NPEs_ErrorVector[i] < std::numeric_limits<float>::epsilon())
      result_vector[i] = diff / std::numeric_limits<float>::epsilon();
    else
      result_vector[i] = diff / NPEs_ErrorVector[i];
  }

  float total_error = fh.GetTotalPEsError();
  float total_diff = fh.GetTotalPEs() - result_total;
  if( std::abs(total_diff) < std::numeric_limits<float>::epsilon() )
    result_total = 0;
  else if( total_error < std::numeric_limits<float>::epsilon() )
    result_total = total_diff / std::numeric_limits<float>::epsilon();
  else
    result_total = total_diff / total_error;

  return result_total;
}

float opdet::FlashUtilities::CompareByFraction	(	const FlashHypothesis &	fh,
		const std::vector< float > &	compare_vector,
		std::vector< float > &	result_vector
	)

Definition at line 57 of file FlashUtilities.cxx.

References opdet::FlashHypothesis::GetHypothesisVector().

Referenced by FlashUtilities().

{
  return CompareByFraction(fh.GetHypothesisVector(),compare_vector,result_vector);
}

float opdet::FlashUtilities::CompareByFraction	(	const std::vector< float > &	NPEs_Vector,
		const std::vector< float > &	compare_vector,
		std::vector< float > &	result_vector
	)

Definition at line 64 of file FlashUtilities.cxx.

{
  if(compare_vector.size()!=NPEs_Vector.size())
    throw std::runtime_error("ERROR in FlashUtilities Compare: Mismatching vector sizes.");
  
  result_vector.resize(NPEs_Vector.size());
  
  float total_comp = 0;
  float total_hyp = 0;
  for(size_t i=0; i<NPEs_Vector.size(); i++){
    total_comp += compare_vector[i];
    total_hyp  += NPEs_Vector[i];
    float diff = NPEs_Vector[i]-compare_vector[i];
    if( std::abs(diff)<std::numeric_limits<float>::epsilon())
      result_vector[i]=0;
    else if(compare_vector[i] < std::numeric_limits<float>::epsilon())
      result_vector[i] = diff / std::numeric_limits<float>::epsilon();
    else
      result_vector[i] = diff / compare_vector[i];
  }

  float result_total=0.0;
  float total_diff = total_hyp - total_comp;
  if( std::abs(total_diff) < std::numeric_limits<float>::epsilon() )
    result_total = 0;
  else if( total_comp < std::numeric_limits<float>::epsilon() )
    result_total = total_diff / std::numeric_limits<float>::epsilon();
  else
    result_total = total_diff / total_comp;

  return result_total;
}

void opdet::FlashUtilities::GetPosition	(	const std::vector< float > &	pe_vector,
		const std::vector< float > &	pos_vector,
		float &	mean,
		float &	rms
	)

Definition at line 99 of file FlashUtilities.cxx.

References pmtana::mean().

Referenced by opdet::FlashHypothesisComparison::FillFlashHypothesisInfo(), opdet::FlashHypothesisComparison::FillSimPhotonCounterInfo(), FlashUtilities(), and GetPosition().

{
  if(pe_vector.size()!=pos_vector.size())
    throw std::runtime_error("ERROR in FlashUtilities GetPosition: Mismatchin vector sizes.");

  float sum = std::accumulate(pe_vector.begin(),pe_vector.end(),0.0);

  if(sum < std::numeric_limits<float>::epsilon()){
    mean=0; rms=0; return;
  }
  
  mean = std::inner_product(pe_vector.begin(),pe_vector.end(),pos_vector.begin(),0.0) / sum;

  rms=0;
  for(size_t i=0; i<pe_vector.size(); i++)
    rms += pe_vector[i]*(pos_vector[i] - mean)*(pos_vector[i] - mean);

  rms = std::sqrt(rms)/sum;
}

void opdet::FlashUtilities::GetPosition	(	const std::vector< float > &	pe_vector,
		const std::vector< float > &	pos_vector,
		double &	mean,
		double &	rms
	)

Definition at line 121 of file FlashUtilities.cxx.

References GetPosition().

{
  float fmean,frms;
  GetPosition(pe_vector,pos_vector,fmean,frms);
  mean = double(fmean);
  rms = double(frms);
}

---

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

• larana/v06_21_01/source/larana/OpticalDetector/FlashUtilities.h
• larana/v06_21_01/source/larana/OpticalDetector/FlashUtilities.cxx