MuonCalib::RtResolutionLookUp Class Reference

Equidistant look up table for resolution tables with the time as key. More...

#include <RtResolutionLookUp.h>

Inheritance diagram for MuonCalib::RtResolutionLookUp:

Collaboration diagram for MuonCalib::RtResolutionLookUp:

Public Types
using	ParVec = std::vector< double >

Public Member Functions
	RtResolutionLookUp (const ParVec &vec)
virtual std::string	name () const override
double	resolution (double t, double) const override final
	returns drift radius for a given time More...
virtual unsigned int	nDoF () const override final
	Returns the number of degrees of freedom of the relation function More...
double	tLower () const
double	tUpper () const
virtual std::string	typeName () const override final
	CalibFunc (const ParVec &vec)
unsigned int	nPar () const
const ParVec &	parameters () const
double	par (unsigned int index) const

Private Member Functions
int	getBin (double t) const
double	getRadius (int bin) const
int	binInRtRange (double t) const

Private Attributes
double	m_t_min {9e9}
double	m_bin_size {1.}
ParVec	m_parameters {}

Detailed Description

Equidistant look up table for resolution tables with the time as key.

The first parameter should be the time corresponding to the first_bin. The second parameter should be the binsize.

The r value is calculated by linear interpolation.

Definition at line 23 of file RtResolutionLookUp.h.

Member Typedef Documentation

ParVec

using MuonCalib::CalibFunc::ParVec = std::vector<double>

inherited

Definition at line 35 of file CalibFunc.h.

Constructor & Destructor Documentation

RtResolutionLookUp()

MuonCalib::RtResolutionLookUp::RtResolutionLookUp ( const ParVec &  vec )

inlineexplicit

Definition at line 25 of file RtResolutionLookUp.h.

                                                       : IRtResolution(vec) {
            if (vec.size() < 4) {
                MsgStream log(Athena::getMessageSvc(), "RtResolutionLookUp");
                log << MSG::WARNING << "<to few parameters>" << endmsg;
            } else {
                m_t_min = par(0);
                m_bin_size = par(1);
            }
        }

Member Function Documentation

binInRtRange()

int MuonCalib::RtResolutionLookUp::binInRtRange ( double  t ) const

inlineprivate

Definition at line 80 of file RtResolutionLookUp.h.

                                                              {
        // get bin
        int bin = getBin(t);
 
        // if t corresponds to a negative bin return first
        if (bin < 0) bin = 0;
 
        // if t corresponds to a bin outside the range of the lookup table return the last bin
        if (static_cast<unsigned>(bin) >= nDoF()) bin = nDoF() - 1;
 
        return bin;
    }

CalibFunc()

MuonCalib::CalibFunc::CalibFunc

inlineexplicitinherited

Definition at line 36 of file CalibFunc.h.

                                                  : 
                    m_parameters{vec} {}

getBin()

int MuonCalib::RtResolutionLookUp::getBin ( double  t ) const

inlineprivate

Definition at line 52 of file RtResolutionLookUp.h.

{ return static_cast<int>((t - m_t_min) / m_bin_size); }

getRadius()

double MuonCalib::RtResolutionLookUp::getRadius ( int  bin ) const

inlineprivate

Definition at line 54 of file RtResolutionLookUp.h.

{ return par(bin + 2); }

name()

virtual std::string MuonCalib::RtResolutionLookUp::name ( ) const

inlineoverridevirtual

Implements MuonCalib::CalibFunc.

Definition at line 35 of file RtResolutionLookUp.h.

{ return "RtResolutionLookUp"; }

nDoF()

virtual unsigned int MuonCalib::RtResolutionLookUp::nDoF ( ) const

inlinefinaloverridevirtual

Returns the number of degrees of freedom of the relation function

Implements MuonCalib::IRtResolution.

Definition at line 39 of file RtResolutionLookUp.h.

                                                        {
            return nPar() -2;
        }

nPar()

unsigned int MuonCalib::CalibFunc::nPar ( ) const

inlineinherited

Definition at line 39 of file CalibFunc.h.

{ return m_parameters.size(); }

par()

double MuonCalib::CalibFunc::par ( unsigned int  index ) const

inlineinherited

Definition at line 41 of file CalibFunc.h.

                                                 {
                return index < nPar() ? m_parameters[index] : 0.;
            }

parameters()

const ParVec& MuonCalib::CalibFunc::parameters ( ) const

inlineinherited

Definition at line 40 of file CalibFunc.h.

{ return m_parameters; }

resolution()

double MuonCalib::RtResolutionLookUp::resolution ( double  t, double    ) const

inlinefinaloverridevirtual

returns drift radius for a given time

Implements MuonCalib::IRtResolution.

Definition at line 62 of file RtResolutionLookUp.h.

                                                                       {
        // get first bin
        int bin = binInRtRange(t);
 
        // shift bin so we are using the last two bins for extrapolation
        if (static_cast<unsigned>(bin) >= nDoF() - 1) bin = nDoF() - 2;
 
        double r1 = getRadius(bin);      // get bin value
        double r2 = getRadius(bin + 1);  // get value of next bin
        double dr = r2 - r1;
 
        // scale factor for interpolation
        double scale = (t - m_t_min) / m_bin_size - (double)bin;
 
        double reso = r1 + dr * scale;
        return reso >= 0 ? reso : 0;
    }

tLower()

double MuonCalib::RtResolutionLookUp::tLower ( ) const

inline

Definition at line 43 of file RtResolutionLookUp.h.

                              {
            return m_t_min;
        }

tUpper()

double MuonCalib::RtResolutionLookUp::tUpper ( ) const

inline

Definition at line 47 of file RtResolutionLookUp.h.

                              {
            return m_t_min +  m_bin_size * nDoF();
        }

typeName()

virtual std::string MuonCalib::IRtResolution::typeName ( ) const

inlinefinaloverridevirtualinherited

Implements MuonCalib::CalibFunc.

Definition at line 24 of file IRtResolution.h.

{ return "IRtResolution"; }

Member Data Documentation

m_bin_size

double MuonCalib::RtResolutionLookUp::m_bin_size {1.}

private

Definition at line 59 of file RtResolutionLookUp.h.

m_parameters

ParVec MuonCalib::CalibFunc::m_parameters {}

privateinherited

Definition at line 48 of file CalibFunc.h.

m_t_min

double MuonCalib::RtResolutionLookUp::m_t_min {9e9}

private

Definition at line 58 of file RtResolutionLookUp.h.

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

• RtResolutionLookUp.h