fitUtilities Class Reference

#include <fitUtilities.h>

Public Member Functions
double	doGaussFit (MonitorElement *ME)
double	doGaussFit (TH1F *)
double	doLanGaussFit (MonitorElement *ME)
double	doLanGaussFit (TH1F *)
	fitUtilities ()
double	getFitChi ()
int	getFitnDof ()
double	getGaussPar (std::string s)
double	getGaussParErr (std::string s)
double	getLanGaussConv (std::string s)
double	getLanGaussPar (std::string s)
double	getLanGaussParErr (std::string s)
void	init ()
	~fitUtilities ()

Private Attributes
double	chi2GausS
double	epGausS [3]
double	epLanGausS [4]
TF1 *	gausFit
TF1 *	langausFit
int32_t	nDofGausS
double	pGausS [3]
double	pLanConv [2]
double	pLanGausS [4]

Detailed Description

Definition at line 28 of file fitUtilities.h.

Constructor & Destructor Documentation

fitUtilities::fitUtilities

(

)

Definition at line 239 of file fitUtilities.h.

References init().

                          :langausFit(0),gausFit(0){
  init();
}

fitUtilities::~fitUtilities

(

)

Definition at line 259 of file fitUtilities.h.

References gausFit, and langausFit.

                           {
  if ( langausFit!=0 ) delete langausFit;
  if ( gausFit!=0 ) delete gausFit;
}

Member Function Documentation

double fitUtilities::doGaussFit ( MonitorElement *  ME )

inline

Definition at line 39 of file fitUtilities.h.

References doGaussFit(), and MonitorElement::getTH1F().

Referenced by doGaussFit().

{return doGaussFit(ME->getTH1F());}

double fitUtilities::doGaussFit

(

TH1F *

htoFit

)

Definition at line 349 of file fitUtilities.h.

References chi2GausS, epGausS, gausFit, Gauss(), i, init(), langausFit, nDofGausS, pGausS, SiStripMonitorClusterAlca_cfi::xmax, and SiStripMonitorClusterAlca_cfi::ymax.

                                           {
  init();
  if (htoFit->GetEntries()!=0) {
    
    // Setting fit range and start values
    double fr[2];
    double sv[3], pllo[3], plhi[3];
    fr[0]=htoFit->GetMean()-5*htoFit->GetRMS();
    fr[1]=htoFit->GetMean()+5*htoFit->GetRMS();
          
    int32_t imax=htoFit->GetMaximumBin();
    double xmax=htoFit->GetBinCenter(imax);
    double ymax=htoFit->GetBinContent(imax);
    int32_t i[2];
    int32_t iArea[2];
          
    i[0]=htoFit->GetXaxis()->FindBin(fr[0]);
    i[1]=htoFit->GetXaxis()->FindBin(fr[1]);
          
    iArea[0]=htoFit->GetXaxis()->FindBin(fr[0]);
    iArea[1]=htoFit->GetXaxis()->FindBin(fr[1]);
    double AreaFWHM=htoFit->Integral(iArea[0],iArea[1],"width");
          
    sv[2]=AreaFWHM/(4*ymax);
    sv[1]=xmax;
    sv[0]=htoFit->Integral(i[0],i[1],"width");
          
    plhi[0]=1000000.0; plhi[1]=10.0; plhi[2]=10.;
    pllo[0]=1.5 ; pllo[1]=0.1; pllo[2]=0.3;
    Char_t FunName[100];
    sprintf(FunName,"FitfcnLG_%s",htoFit->GetName());
    gausFit = new TF1(FunName,Gauss,fr[0],fr[1],3);
    gausFit->SetParameters(sv);
    gausFit->SetParNames("Constant","GaussPeak","Sigma");
          
    for (int32_t i=0; i<3; i++) {
      gausFit->SetParLimits(i,pllo[i],plhi[i]);
    }
 
    try{
      htoFit->Fit(gausFit,"R0");
      
      gausFit->SetRange(fr[0],fr[1]);
      gausFit->GetParameters(pGausS);
      std::memcpy((void*) epGausS, (void*) gausFit->GetParErrors(), 3*sizeof(double));
      
      chi2GausS =langausFit->GetChisquare(); // obtain chi^2
      nDofGausS = langausFit->GetNDF();// obtain ndf
    }
    catch(...){
      edm::LogError("fitUtility") << "problem in fitting " << htoFit->GetTitle() << " \n\tDefault values of the parameters will be used";
      pGausS[0]=-9999; pGausS[1]=-9999; pGausS[2]=-9999;
      epGausS[0]=-9999; epGausS[1]=-9999; epGausS[2]=-9999;
      chi2GausS=-9999;  nDofGausS=-9999;    
    }
         
  }
  else {
    pGausS[0]=-9999; pGausS[1]=-9999; pGausS[2]=-9999;
    epGausS[0]=-9999; epGausS[1]=-9999; epGausS[2]=-9999;
    chi2GausS=-9999;  nDofGausS=-9999;    
  }
  
  return htoFit->GetEntries();
}

double fitUtilities::doLanGaussFit ( MonitorElement *  ME )

inline

Definition at line 36 of file fitUtilities.h.

References doLanGaussFit(), and MonitorElement::getTH1F().

Referenced by doLanGaussFit().

{return doLanGaussFit(ME->getTH1F());}

double fitUtilities::doLanGaussFit

(

TH1F *

htoFit

)

Definition at line 267 of file fitUtilities.h.

References chi2GausS, epLanGausS, i, init(), langaufun(), langaupro(), langausFit, nDofGausS, pLanConv, pLanGausS, SiStripMonitorClusterAlca_cfi::xmax, and SiStripMonitorClusterAlca_cfi::ymax.

                                              {
  init();
 
  if (htoFit->GetEntries()!=0) {
     edm::LogInfo("fitUtility")<<"Fitting "<< htoFit->GetTitle() <<std::endl;
    // Setting fit range and start values
    double fr[2];
    double sv[4], pllo[4], plhi[4];
    fr[0]=0.5*htoFit->GetMean();
    fr[1]=3.0*htoFit->GetMean();
          
    // (EM) parameters setting good for signal only 
    int32_t imax=htoFit->GetMaximumBin();
    double xmax=htoFit->GetBinCenter(imax);
    double ymax=htoFit->GetBinContent(imax);
    int32_t i[2];
    int32_t iArea[2];
          
    i[0]=htoFit->GetXaxis()->FindBin(fr[0]);
    i[1]=htoFit->GetXaxis()->FindBin(fr[1]);
          
    iArea[0]=htoFit->GetXaxis()->FindBin(fr[0]);
    iArea[1]=htoFit->GetXaxis()->FindBin(fr[1]);
    double AreaFWHM=htoFit->Integral(iArea[0],iArea[1],"width");
          
    sv[1]=xmax;
    sv[2]=htoFit->Integral(i[0],i[1],"width");
    sv[3]=AreaFWHM/(4*ymax);
    sv[0]=sv[3];
          
    plhi[0]=25.0; plhi[1]=200.0; plhi[2]=1000000.0; plhi[3]=50.0;
    pllo[0]=1.5 ; pllo[1]=10.0 ; pllo[2]=1.0      ; pllo[3]= 1.0;
          
    Char_t FunName[100];
    sprintf(FunName,"FitfcnLG_%s",htoFit->GetName());  
          
    langausFit = new TF1(FunName,langaufun,fr[0],fr[1],4);
    langausFit->SetParameters(sv);
    langausFit->SetParNames("Width","MP","Area","GSigma");
          
    for (int32_t i=0; i<4; i++) {
      langausFit->SetParLimits(i,pllo[i],plhi[i]);
    }  
          
    try{
      htoFit->Fit(langausFit,"R0");  // "R" fit in a range,"0" quiet fit
      
      langausFit->SetRange(fr[0],fr[1]);
      langausFit->GetParameters(pLanGausS);
      std::memcpy((void*) epLanGausS, (void*) langausFit->GetParErrors(), 4*sizeof(double));
      
      chi2GausS =langausFit->GetChisquare();  // obtain chi^2
      nDofGausS = langausFit->GetNDF();           // obtain ndf
      
      double sPeak, sFWHM;
      langaupro(pLanGausS,sPeak,sFWHM);
      pLanConv[0]=sPeak;
      pLanConv[1]=sFWHM;
      edm::LogInfo("fitUtility") << "langaupro:  max  " << sPeak << std::endl;
      edm::LogInfo("fitUtility") << "langaupro:  FWHM " << sFWHM << std::endl;
    }
    catch(...){
      edm::LogError("fitUtility") << "problem in fitting " << htoFit->GetTitle() << " \n\tDefault values of the parameters will be used";
      pLanGausS[0]=-9999; pLanGausS[1]=-9999; pLanGausS[2]=-9999; pLanGausS[3]=-9999;
      epLanGausS[0]=-9999; epLanGausS[1]=-9999; epLanGausS[2]=-9999; epLanGausS[3]=-9999;
      pLanConv[0]=-9999;   pLanConv[1]=-9999;   
      chi2GausS=-9999;  nDofGausS=-9999;    
    }
  }
  else {  
    pLanGausS[0]=-9999; pLanGausS[1]=-9999; pLanGausS[2]=-9999; pLanGausS[3]=-9999;
    epLanGausS[0]=-9999; epLanGausS[1]=-9999; epLanGausS[2]=-9999; epLanGausS[3]=-9999;
    pLanConv[0]=-9999;   pLanConv[1]=-9999;   
    chi2GausS=-9999;  nDofGausS=-9999;    
  }

  return htoFit->GetEntries();

}

double fitUtilities::getFitChi ( )

inline

Definition at line 49 of file fitUtilities.h.

References chi2GausS.

{return chi2GausS;}

int fitUtilities::getFitnDof ( )

inline

Definition at line 50 of file fitUtilities.h.

References nDofGausS.

{return nDofGausS;}

double fitUtilities::getGaussPar

(

std::string

s

)

Definition at line 451 of file fitUtilities.h.

References pGausS.

                                            {
  if(s=="area")
    return pGausS[0];
  else if(s=="mean")
    return pGausS[1];
  else if(s=="sigma")
    return pGausS[2];
  else
    return -99999;
}

double fitUtilities::getGaussParErr

(

std::string

s

)

Definition at line 462 of file fitUtilities.h.

References epGausS.

                                               {
  if(s=="area")
    return epGausS[0];
  else if(s=="mean")
    return epGausS[1];
  else if(s=="sigma")
    return epGausS[2];
  else
    return -99999;
}

double fitUtilities::getLanGaussConv

(

std::string

s

)

Definition at line 442 of file fitUtilities.h.

References pLanConv.

                                                {
  if(s=="mpv")
    return pLanConv[0];
  else if(s=="fwhm")
    return pLanConv[1];
  else
    return -99999;
}

double fitUtilities::getLanGaussPar

(

std::string

s

)

Definition at line 416 of file fitUtilities.h.

References pLanGausS.

                                              {
  if(s=="landau_width")
    return pLanGausS[0];
  else if(s=="mpv")
    return pLanGausS[1];
  else if(s=="area")
    return pLanGausS[2];
  else if(s=="gauss_sigma")
    return pLanGausS[3];
  else
    return -99999;
}

double fitUtilities::getLanGaussParErr

(

std::string

s

)

Definition at line 429 of file fitUtilities.h.

References epLanGausS.

                                                 {
  if(s=="landau_width")
    return epLanGausS[0];
  else if(s=="mpv")
    return epLanGausS[1];
  else if(s=="area")
    return epLanGausS[2];
  else if(s=="gauss_sigma")
    return epLanGausS[3];
  else
    return -99999;
}

void fitUtilities::init

(

void

)

Definition at line 244 of file fitUtilities.h.

References chi2GausS, epGausS, epLanGausS, nDofGausS, pGausS, pLanConv, and pLanGausS.

Referenced by doGaussFit(), doLanGaussFit(), and fitUtilities().

                       {
  pLanGausS[0]=0 ;   pLanGausS[1]=0;   pLanGausS[2]=0;   pLanGausS[3]=0;
  epLanGausS[0]=0;  epLanGausS[1]=0;  epLanGausS[2]=0;  epLanGausS[3]=0;
  pGausS[0]=0 ;   pGausS[1]=0;   pGausS[2]=0;
  epGausS[0]=0;  epGausS[1]=0;  epGausS[2]=0;
  pLanConv[0]=0;  pLanConv[1]=0;

  //if ( langausFit!=0 ) delete langausFit;
  //if ( gausFit!=0 ) delete gausFit;

  chi2GausS = -9999.;
  nDofGausS = -9999;
}

Member Data Documentation

double fitUtilities::chi2GausS

private

Definition at line 57 of file fitUtilities.h.

Referenced by doGaussFit(), doLanGaussFit(), getFitChi(), and init().

double fitUtilities::epGausS[3]

private

Definition at line 55 of file fitUtilities.h.

Referenced by doGaussFit(), getGaussParErr(), and init().

double fitUtilities::epLanGausS[4]

private

Definition at line 54 of file fitUtilities.h.

Referenced by doLanGaussFit(), getLanGaussParErr(), and init().

TF1* fitUtilities::gausFit

private

Definition at line 60 of file fitUtilities.h.

Referenced by doGaussFit(), and ~fitUtilities().

TF1* fitUtilities::langausFit

private

Definition at line 59 of file fitUtilities.h.

Referenced by doGaussFit(), doLanGaussFit(), and ~fitUtilities().

int32_t fitUtilities::nDofGausS

private

Definition at line 58 of file fitUtilities.h.

Referenced by doGaussFit(), doLanGaussFit(), getFitnDof(), and init().

double fitUtilities::pGausS[3]

private

Definition at line 55 of file fitUtilities.h.

Referenced by doGaussFit(), getGaussPar(), and init().

double fitUtilities::pLanConv[2]

private

Definition at line 56 of file fitUtilities.h.

Referenced by doLanGaussFit(), getLanGaussConv(), and init().

double fitUtilities::pLanGausS[4]

private

Definition at line 54 of file fitUtilities.h.

Referenced by doLanGaussFit(), getLanGaussPar(), and init().