siPixelLACalibration::Chebyshev Class Reference

#include <SiPixelLorentzAngleCalibrationStruct.h>

Public Member Functions
	Chebyshev (int n, double xmin, double xmax)
double	operator() (const double *xx, const double *p)

Private Attributes
double	fA
double	fB
std::vector< double >	fC
std::vector< double >	fT

Detailed Description

Definition at line 10 of file SiPixelLorentzAngleCalibrationStruct.h.

Constructor & Destructor Documentation

Chebyshev()

siPixelLACalibration::Chebyshev::Chebyshev ( int  n, double  xmin, double  xmax  )

inline

Definition at line 12 of file SiPixelLorentzAngleCalibrationStruct.h.

: fA(xmin), fB(xmax), fT(std::vector<double>(n + 1)) {}

Member Function Documentation

operator()()

double siPixelLACalibration::Chebyshev::operator() ( const double *  xx, const double *  p  )

inline

Definition at line 14 of file SiPixelLorentzAngleCalibrationStruct.h.

References fA, fB, fT, mps_fire::i, AlCaHLTBitMon_ParallelJobs::p, x, and geometryCSVtoXML::xx.

                                                         {
      double x = (2.0 * xx[0] - fA - fB) / (fB - fA);
      int npar = fT.size();

      if (npar == 1)
        return p[0];
      if (npar == 2)
        return p[0] + x * p[1];
      // build the polynomials
      fT[0] = 1;
      fT[1] = x;
      for (int i = 2; i < npar; ++i) {
        fT[i] = 2 * x * fT[i - 1] - fT[i - 2];
      }
      double sum = p[0] * fT[0];
      for (int i = 1; i < npar; ++i) {
        sum += p[i] * fT[i];
      }
      return sum;
    }

Member Data Documentation

fA

double siPixelLACalibration::Chebyshev::fA

private

Definition at line 36 of file SiPixelLorentzAngleCalibrationStruct.h.

Referenced by operator()().

fB

double siPixelLACalibration::Chebyshev::fB

private

Definition at line 37 of file SiPixelLorentzAngleCalibrationStruct.h.

Referenced by operator()().

fC

std::vector<double> siPixelLACalibration::Chebyshev::fC

private

Definition at line 39 of file SiPixelLorentzAngleCalibrationStruct.h.

fT

std::vector<double> siPixelLACalibration::Chebyshev::fT

private

Definition at line 38 of file SiPixelLorentzAngleCalibrationStruct.h.

Referenced by operator()().