#include <PulseFitWithFunction.h>

Inheritance diagram for PulseFitWithFunction:

Public Member Functions
virtual double	doFit (double *)

double	getAmpl ()

double	getAmpl_parab ()

double	getMax_parab ()

int	getSampMax_parab ()

double	getTime ()

double	getTime_parab ()

virtual void	init (int, int, int, int, double, double)

	PulseFitWithFunction ()

	~PulseFitWithFunction () override

Public Attributes
double	fAmp_fitted_max

double	fFunc_max

int	fNumber_samp_max

double	fSigma_ped

double	fTim_fitted_max

double	fTim_max

double	fValue_tim_max

Private Member Functions
double	Electronic_shape (double)

double	Fit_electronic (int, double *, double)

void	Fit_parab (double , int, int, double )

Private Attributes
double	amp_max

double	amp_parab

double	fAlpha

double	fAlpha_beam

double	fAlpha_laser

double	fBeta

double	fBeta_beam

double	fBeta_laser

int	fNb_iter

int	fNsamples

int	fNum_samp_after_max

int	fNum_samp_bef_max

int	imax

double	tim_parab

Detailed Description

Definition at line 26 of file PulseFitWithFunction.h.

Constructor & Destructor Documentation

◆ PulseFitWithFunction()

PulseFitWithFunction::PulseFitWithFunction ( )

Definition at line 26 of file PulseFitWithFunction.cc.

                                            {
   fNsamples = 0;
   fNum_samp_bef_max = 0;
   fNum_samp_after_max = 0;
 }

References fNsamples, fNum_samp_after_max, and fNum_samp_bef_max.

◆ ~PulseFitWithFunction()

PulseFitWithFunction::~PulseFitWithFunction ( )

override

Definition at line 33 of file PulseFitWithFunction.cc.

33 {}

Member Function Documentation

◆ doFit()

double PulseFitWithFunction::doFit ( double * adc )

virtual

Definition at line 60 of file PulseFitWithFunction.cc.

                                               {
   double parout[4];  // amp_max ;
                      //double amp_parab , tim_parab ;
   double chi2;
   //int imax ;
   //
   // first  one has to get starting point first with parabolic fun// //
   Fit_parab(&adc[0], 3, fNsamples, parout);
   amp_parab = parout[0];
   tim_parab = parout[1];
   imax = (int)parout[2];
   amp_max = parout[3];
   //printf("amp_parab= %f tim_parab=%f amp_max=%f imax=%d\n",amp_parab,tim_parab,amp_max,imax);
   fNumber_samp_max = imax;
   //
  
   if (amp_parab < 1.) {
     tim_parab = (double)imax;
     amp_parab = amp_max;
   }
   //
   fValue_tim_max = tim_parab;
   fFunc_max = amp_parab;
   fTim_max = tim_parab;
  
   //  here to fit maximum amplitude and time of arrival ...
  
   chi2 = Fit_electronic(0, &adc[0], 8.);
   // adc is an array to be filled with samples
   // 0 is for Laser (1 for electron)
   // 8 is for sigma of pedestals
   // which (can be computed)
  
   //  double amplitude = fAmp_fitted_max ; // amplitude fitted
   // double time = fTim_fitted_max ; // time fitted
  
   return chi2;  // return amplitude fitted
 }

References ecalLiteDTU::adc(), amp_max, amp_parab, hltPixelTracks_cff::chi2, fFunc_max, Fit_electronic(), Fit_parab(), fNsamples, fNumber_samp_max, fTim_max, fValue_tim_max, imax, createfilelist::int, and tim_parab.

Referenced by EcalPerEvtLaserAnalyzer::endJob(), and EcalLaserAnalyzer::endJob().

◆ Electronic_shape()

double PulseFitWithFunction::Electronic_shape ( double tim )

private

Definition at line 212 of file PulseFitWithFunction.cc.

                                                         {
   // electronic function (from simulation) to fit ECAL pulse shape
   double func_electronic, dtsbeta, variable, puiss;
   double albet = fAlpha * fBeta;
   if (albet <= 0)
     return ((Double_t)0.);
   double dt = tim - fTim_max;
   if (dt > -albet) {
     dtsbeta = dt / fBeta;
     variable = 1. + dt / albet;
     puiss = TMath::Power(variable, fAlpha);
     func_electronic = fFunc_max * puiss * TMath::Exp(-dtsbeta);
   } else
     func_electronic = 0.;
   //
   return func_electronic;
 }

References dt, fAlpha, fBeta, fFunc_max, fTim_max, and taus_updatedMVAIds_cff::variable.

Referenced by Fit_electronic().

◆ Fit_electronic()

double PulseFitWithFunction::Fit_electronic	(	int	data,
		double *	adc_to_fit,
		double	sigmas_sample
	)

private

Definition at line 103 of file PulseFitWithFunction.cc.

                                                                                               {
   // fit electronic function from simulation
   // parameters fAlpha and fBeta are fixed and fit is providing
   // the maximum amplitude ( fAmp_fitted_max ) and the time of
   // the maximum amplitude ( fTim_fitted_max)
   // initialization of parameters
   double chi2 = 0;
   double d_alpha, d_beta;
   // first initialize parameters fAlpha and fBeta ( depending of beam or laser)
   fAlpha = fAlpha_laser;
   fBeta = fBeta_laser;
   if (data == 1) {
     fAlpha = fAlpha_beam;
     fBeta = fBeta_beam;
   }
   //
   fAmp_fitted_max = 0.;
   fTim_fitted_max = 0.;
   double un_sur_sigma = 1. / fSigma_ped;
   double variation_func_max = 0.;
   double variation_tim_max = 0.;
   //
   if (fValue_tim_max > 20. || fValue_tim_max < 3.) {
     fValue_tim_max = fNumber_samp_max;
   }
   int num_fit_min = (int)(fValue_tim_max - fNum_samp_bef_max);
   int num_fit_max = (int)(fValue_tim_max + fNum_samp_after_max);
   //
  
   if (sigmas_sample > 0.)
     un_sur_sigma = 1. / sigmas_sample;
   else
     un_sur_sigma = 1.;
  
   double func, delta;
   //          Loop on iterations
   for (int iter = 0; iter < fNb_iter; iter++) {
     //          initialization inside iteration loop !
     chi2 = 0.;
     double d11 = 0.;
     double d12 = 0.;
     double d22 = 0.;
     double z1 = 0.;
     double z2 = 0.;
     fFunc_max += variation_func_max;
     fTim_max += variation_tim_max;
     int nsamp_used = 0;
     //
  
     // Then we loop on samples to be fitted
  
     for (int i = num_fit_min; i < num_fit_max + 1; i++) {
       // calculate function to be fitted
  
       func = Electronic_shape((double)i);
  
       // then calculate derivatives of function to be fitted
       double dt = (double)i - fTim_max;
       double alpha_beta = fAlpha * fBeta;
  
       if (dt > -alpha_beta) {
         double dt_sur_beta = dt / fBeta;
  
         double variable = (double)1. + dt / alpha_beta;
         double expo = TMath::Exp(-dt_sur_beta);
  
         double puissance = TMath::Power(variable, fAlpha);
         d_alpha = un_sur_sigma * puissance * expo;
         d_beta = fFunc_max * d_alpha * dt_sur_beta / (alpha_beta * variable);
       } else {
         continue;
       }
  
       nsamp_used++;  // number of samples used inside the fit
       // compute matrix elements D (symetric --> d12 = d21 )
       d11 += d_alpha * d_alpha;
       d12 += d_alpha * d_beta;
       d22 += d_beta * d_beta;
       // compute delta
       delta = (adc_to_fit[i] - func) * un_sur_sigma;
       // compute vector elements Z
       z1 += delta * d_alpha;
       z2 += delta * d_beta;
       chi2 += delta * delta;
     }  //             end of loop on samples
     double denom = d11 * d22 - d12 * d12;
     if (denom == 0.) {
       //printf( "attention denom = 0 signal pas fitte \n") ;
       return 101;
     }
     if (nsamp_used < 3) {
       //printf( "Attention nsamp = %d ---> no function fit provided \n",nsamp_used) ;
       return 102;
     }
     // compute variations of parameters fAmp_max and fTim_max
     variation_func_max = (z1 * d22 - z2 * d12) / denom;
     variation_tim_max = (-z1 * d12 + z2 * d11) / denom;
     chi2 = chi2 / ((double)nsamp_used - 2.);
   }  //      end of loop on iterations
   // results of the fit are calculated
   fAmp_fitted_max = fFunc_max + variation_func_max;
   fTim_fitted_max = fTim_max + variation_tim_max;
   //
   return chi2;
 }

References hltPixelTracks_cff::chi2, data, dumpMFGeometry_cfg::delta, makePileupJSON::denom, dt, Electronic_shape(), fAlpha, fAlpha_beam, fAlpha_laser, fAmp_fitted_max, fBeta, fBeta_beam, fBeta_laser, fFunc_max, fNb_iter, fNum_samp_after_max, fNum_samp_bef_max, fNumber_samp_max, fSigma_ped, fTim_fitted_max, fTim_max, TrackCollections2monitor_cff::func, fValue_tim_max, mps_fire::i, createfilelist::int, taus_updatedMVAIds_cff::variable, and testProducerWithPsetDescEmpty_cfi::z2.

Referenced by doFit().

◆ Fit_parab()

void PulseFitWithFunction::Fit_parab	(	double *	,
		int	,
		int	,
		double *
	)

private

Definition at line 229 of file PulseFitWithFunction.cc.

                                                                                              {
   /* Now we calculate the parabolic adjustement in order to get        */
   /*    maximum and time max                                           */
  
   double denom, dt, amp1, amp2, amp3;
   double ampmax = 0.;
   int imax = 0;
   int k;
   /*
                                                                    */
   for (k = nmin; k < nmax; k++) {
     //printf("ampl[%d]=%f\n",k,ampl[k]);
     if (ampl[k] > ampmax) {
       ampmax = ampl[k];
       imax = k;
     }
   }
   amp1 = ampl[imax - 1];
   amp2 = ampl[imax];
   amp3 = ampl[imax + 1];
   denom = 2. * amp2 - amp1 - amp3;
   /*                                         */
   if (denom > 0.) {
     dt = 0.5 * (amp3 - amp1) / denom;
   } else {
     //printf("denom =%f\n",denom)  ;
     dt = 0.5;
   }
   /*                                             */
   /* ampmax correspond au maximum d'amplitude parabolique et dt        */
   /* decalage en temps par rapport au sample maximum soit k + dt       */
  
   parout[0] = amp2 + (amp3 - amp1) * dt * 0.25;
   parout[1] = (double)imax + dt;
   parout[2] = (double)imax;
   parout[3] = ampmax;
   return;
 }

References makePileupJSON::denom, dt, imax, and dqmdumpme::k.

Referenced by doFit().

◆ getAmpl()

double PulseFitWithFunction::getAmpl ( )

inline

Definition at line 52 of file PulseFitWithFunction.h.

52 { return fAmp_fitted_max; }

References fAmp_fitted_max.

Referenced by EcalPerEvtLaserAnalyzer::endJob(), and EcalLaserAnalyzer::endJob().

◆ getAmpl_parab()

double PulseFitWithFunction::getAmpl_parab ( )

inline

Definition at line 49 of file PulseFitWithFunction.h.

49 { return amp_parab; }

References amp_parab.

◆ getMax_parab()

double PulseFitWithFunction::getMax_parab ( )

inline

Definition at line 55 of file PulseFitWithFunction.h.

55 { return amp_max; }

References amp_max.

◆ getSampMax_parab()

int PulseFitWithFunction::getSampMax_parab ( )

inline

Definition at line 56 of file PulseFitWithFunction.h.

56 { return imax; }

References imax.

◆ getTime()

double PulseFitWithFunction::getTime ( )

inline

Definition at line 53 of file PulseFitWithFunction.h.

53 { return fTim_fitted_max; }

References fTim_fitted_max.

Referenced by EcalPerEvtLaserAnalyzer::endJob(), and EcalLaserAnalyzer::endJob().

◆ getTime_parab()

double PulseFitWithFunction::getTime_parab ( )

inline

Definition at line 50 of file PulseFitWithFunction.h.

50 { return tim_parab; }

References tim_parab.

◆ init()

void PulseFitWithFunction::init	(	int	n_samples,
		int	samplb,
		int	sampla,
		int	niter,
		double	alfa,
		double	beta
	)

virtual

Definition at line 37 of file PulseFitWithFunction.cc.

                                                                                                           {
   //printf("\n");
   //printf(" =========================================================\n");
   //printf(" ==     Initialising the function fit method            ==\n");
   //printf(" ==          PulseFitWithFunction::init                 ==\n");
   //printf(" ==                                                     ==\n");
  
   fNsamples = n_samples;
   fAlpha_laser = alfa;
   fBeta_laser = beta;
   fAlpha_beam = 0.98;
   fBeta_beam = 2.04;
   fNb_iter = niter;
   fNum_samp_bef_max = samplb;
   fNum_samp_after_max = sampla;
   //printf(" ==  # samples used = %3d                               ==\n",fNsamples);
   //printf(" ==  #sample before max= %1d and #sample after maximum= %1d ==\n",fNum_samp_bef_max,fNum_samp_after_max);
   //printf(" ==           alpha= %5.4f       beta= %5.4f          ==\n",fAlpha_laser,fBeta_laser);
   //printf(" =========================================================\n\n");
   return;
 }