RZLine Class Reference

#include <RZLine.h>

Classes
struct	ErrZ2_tag

Public Member Functions
float	chi2 () const
float	cotTheta () const
float	covii () const
float	covsi () const
float	covss () const
float	intercept () const
template<typename P , typename E , typename B >
	RZLine (const P &points, const E &errors, const B &isBarrel)
	RZLine (const std::vector< float > &r, const std::vector< float > &z, const std::vector< float > &errZ)
template<size_t N>
	RZLine (const std::array< float, N > &r, const std::array< float, N > &z, const std::array< float, N > &errZ)
template<typename T >
	RZLine (const T &r, const T &z, const T &errZ2, ErrZ2_tag)

Private Member Functions
template<typename T >
void	calculate (const T *r, const T *z, const T *errZ2, size_t n)

Static Private Member Functions
template<typename T >
static constexpr T	sqr (T t)

Private Attributes
float	chi2_
float	cotTheta_
float	covii_
float	covsi_
float	covss_
float	intercept_

Detailed Description

Definition at line 12 of file RZLine.h.

Constructor & Destructor Documentation

RZLine() [1/4]

template<typename P , typename E , typename B >

RZLine::RZLine ( const P &  points, const E &  errors, const B &  isBarrel  )

inline

Constructor for containers of GlobalPoint, GlobalError, and bool

Template Parameters

P	Container of GlobalPoint
E	Container of GlobalError
B	Container of bool

Container can be e.g. std::vector, std::array, or DynArray.

Although for std::array use this constructor could be specialized to use std::array instead of DynArray for temporary storage.

Definition at line 29 of file RZLine.h.

References calculate(), mps_fire::i, PixelPluginsPhase0_cfi::isBarrel, dqmiodumpmetadata::n, AlCaHLTBitMon_ParallelJobs::p, alignCSCRings::r, sqr(), and z.

                                                              {
    const size_t n = points.size();
    const size_t nSafe = n > 0 ? n : 1;
    float r[nSafe];
    float z[nSafe];
    float errZ2[nSafe];
    for (size_t i = 0; i < n; ++i) {
      const GlobalPoint& p = points[i];
      r[i] = p.perp();
      z[i] = p.z();
    }

    float simpleCot2 = n > 1 ? sqr((z[n - 1] - z[0]) / (r[n - 1] - r[0])) : 0.f;
    for (size_t i = 0; i < n; ++i) {
      errZ2[i] = (isBarrel[i]) ? errors[i].czz() : errors[i].rerr(points[i]) * simpleCot2;
    }

    calculate(r, z, errZ2, n);
  }

RZLine() [2/4]

RZLine::RZLine ( const std::vector< float > &  r, const std::vector< float > &  z, const std::vector< float > &  errZ  )

inline

Constructor for std::vector of r, z, and z standard deviation

Definition at line 52 of file RZLine.h.

References calculate(), fftjetvertexadder_cfi::errZ, mps_fire::i, dqmiodumpmetadata::n, alignCSCRings::r, sqr(), and z.

                                                                                             {
    const size_t n = errZ.size();
    float errZ2[n > 0 ? n : n + 1];
    for (size_t i = 0; i < n; ++i)
      errZ2[i] = sqr(errZ[i]);
    calculate(r.data(), z.data(), errZ2, n);
  }

RZLine() [3/4]

template<size_t N>

RZLine::RZLine ( const std::array< float, N > &  r, const std::array< float, N > &  z, const std::array< float, N > &  errZ  )

inline

Constructor for std::array of r, z, and z standard deviation

Definition at line 64 of file RZLine.h.

References calculate(), fftjetvertexadder_cfi::errZ, mps_fire::i, N, alignCSCRings::r, sqr(), and z.

                                                                                                   {
    std::array<float, N> errZ2;
    for (size_t i = 0; i < N; ++i)
      errZ2[i] = sqr(errZ[i]);
    calculate(r.data(), z.data(), errZ2.data(), N);
  }

RZLine() [4/4]

template<typename T >

RZLine::RZLine ( const T &  r, const T &  z, const T &  errZ2, ErrZ2_tag    )

inline

Constructor for container of r, z, and z variance

Template Parameters

T	Container of float

Container can be e.g. std::vector, std::array, or DynArray.

The ErrZ2_tag parameter is used to distinguish this constructor from other 3-parameter constructors.

Passing variance is useful in cases where it is already available to avoid making a square of a square root.

Definition at line 85 of file RZLine.h.

References calculate(), alignCSCRings::r, and z.

                                                            {
    calculate(r.data(), z.data(), errZ2.data(), r.size());
  }

Member Function Documentation

calculate()

template<typename T >

void RZLine::calculate ( const T *  r, const T *  z, const T *  errZ2, size_t  n  )

inlineprivate

Definition at line 99 of file RZLine.h.

References chi2_, cotTheta_, covii_, covsi_, covss_, mps_fire::i, intercept_, linearFit(), dqmiodumpmetadata::n, alignCSCRings::r, sqr(), and z.

Referenced by RZLine().

                                                                   {
    //Have 0 and 1 cases return same value
    if (n < 2) [[unlikely]] {
      n = 0;
    }
    linearFit(r, z, n, errZ2, cotTheta_, intercept_, covss_, covii_, covsi_);
    chi2_ = 0.f;
    for (size_t i = 0; i < n; ++i) {
      chi2_ += sqr(((z[i] - intercept_) - cotTheta_ * r[i])) / errZ2[i];
    }
  }

chi2()

float RZLine::chi2 ( void  ) const

inline

Definition at line 95 of file RZLine.h.

References chi2_.

Referenced by TrackingNtuple::fillSeeds(), CAHitTripletGenerator::hitNtuplets(), CAHitQuadrupletGenerator::hitNtuplets(), MultiHitGeneratorFromChi2::hitSets(), PixelFitterByConformalMappingAndLine::run(), PixelFitterByHelixProjections::run(), and TrackFitter::run().

{ return chi2_; }

cotTheta()

float RZLine::cotTheta ( ) const

inline

Definition at line 89 of file RZLine.h.

References cotTheta_.

Referenced by PixelFitterByConformalMappingAndLine::run().

{ return cotTheta_; }

covii()

float RZLine::covii ( ) const

inline

Definition at line 92 of file RZLine.h.

References covii_.

Referenced by PixelFitterByConformalMappingAndLine::run().

{ return covii_; }

covsi()

float RZLine::covsi ( ) const

inline

Definition at line 93 of file RZLine.h.

References covsi_.

{ return covsi_; }

covss()

float RZLine::covss ( ) const

inline

Definition at line 91 of file RZLine.h.

References covss_.

Referenced by PixelFitterByConformalMappingAndLine::run().

{ return covss_; }

intercept()

float RZLine::intercept ( ) const

inline

Definition at line 90 of file RZLine.h.

References intercept_.

Referenced by PixelFitterByConformalMappingAndLine::run().

{ return intercept_; }

sqr()

template<typename T >

static constexpr T RZLine::sqr ( T  t )

inlinestaticprivate

Definition at line 112 of file RZLine.h.

References submitPVValidationJobs::t.

Referenced by calculate(), and RZLine().

                              {
    return t * t;
  }

Member Data Documentation

chi2_

float RZLine::chi2_

private

Definition at line 121 of file RZLine.h.

Referenced by calculate(), and chi2().

cotTheta_

float RZLine::cotTheta_

private

Definition at line 116 of file RZLine.h.

Referenced by calculate(), and cotTheta().

covii_

float RZLine::covii_

private

Definition at line 119 of file RZLine.h.

Referenced by calculate(), and covii().

covsi_

float RZLine::covsi_

private

Definition at line 120 of file RZLine.h.

Referenced by calculate(), and covsi().

covss_

float RZLine::covss_

private

Definition at line 118 of file RZLine.h.

Referenced by calculate(), and covss().

intercept_

float RZLine::intercept_

private

Definition at line 117 of file RZLine.h.

Referenced by calculate(), and intercept().