/**************************************************************************
* This file is property of and copyright by *
* the Relativistic Heavy Ion Group (RHIG), Yale University, US, 2009 *
* *
* Primary Author: Per Thomas Hille
*
* *
* Contributors are mentioned in the code where appropriate. *
* Please report bugs to p.t.hille@fys.uio.no *
* *
* Permission to use, copy, modify and distribute this software and its *
* documentation strictly for non-commercial purposes is hereby granted *
* without fee, provided that the above copyright notice appears in all *
* copies and that both the copyright notice and this permission notice *
* appear in the supporting documentation. The authors make no claims *
* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
//
// Extraction of amplitude and peak position
// FRom CALO raw data using
// least square fit for the
// Moment assuming identical and
// independent errors (equivalent with chi square)
//
#include "AliCaloRawAnalyzerKStandard.h"
#include "AliCaloBunchInfo.h"
#include "AliCaloFitResults.h"
#include "AliLog.h"
#include "TMath.h"
#include
#include
#include "TF1.h"
#include "TGraph.h"
#include "TRandom.h"
#include "AliEMCALRawResponse.h"
using namespace std;
ClassImp( AliCaloRawAnalyzerKStandard )
AliCaloRawAnalyzerKStandard::AliCaloRawAnalyzerKStandard() : AliCaloRawAnalyzerFitter("Chi Square ( kStandard )", "KStandard")
{
fAlgo = Algo::kStandard;
}
AliCaloRawAnalyzerKStandard::~AliCaloRawAnalyzerKStandard()
{
// delete fTf1;
}
AliCaloFitResults
AliCaloRawAnalyzerKStandard::Evaluate( const vector &bunchlist, const UInt_t altrocfg1, const UInt_t altrocfg2 )
{
//Evaluation Amplitude and TOF
Float_t pedEstimate = 0;
short maxADC = 0;
Int_t first = 0;
Int_t last = 0;
Int_t bunchIndex = 0;
Float_t ampEstimate = 0;
short timeEstimate = 0;
Float_t time = 0;
Float_t amp=0;
Float_t chi2 = 0;
Int_t ndf = 0;
Bool_t fitDone = kFALSE;
int nsamples = PreFitEvaluateSamples( bunchlist, altrocfg1, altrocfg2, bunchIndex, ampEstimate,
maxADC, timeEstimate, pedEstimate, first, last, (int)fAmpCut );
if (ampEstimate >= fAmpCut )
{
time = timeEstimate;
Int_t timebinOffset = bunchlist.at(bunchIndex).GetStartBin() - (bunchlist.at(bunchIndex).GetLength()-1);
amp = ampEstimate;
if ( nsamples > 1 && maxADC< OVERFLOWCUT )
{
FitRaw(first, last, amp, time, chi2, fitDone);
time += timebinOffset;
timeEstimate += timebinOffset;
ndf = nsamples - 2;
}
}
if ( fitDone )
{
Float_t ampAsymm = (amp - ampEstimate)/(amp + ampEstimate);
Float_t timeDiff = time - timeEstimate;
if ( (TMath::Abs(ampAsymm) > 0.1) || (TMath::Abs(timeDiff) > 2) )
{
amp = ampEstimate;
time = timeEstimate;
fitDone = kFALSE;
}
}
if (amp >= fAmpCut )
{
if ( ! fitDone)
{
amp += (0.5 - gRandom->Rndm());
}
time = time * TIMEBINWITH;
time -= fL1Phase;
return AliCaloFitResults( -99, -99, fAlgo , amp, time,
(int)time, chi2, ndf, Ret::kDummy );
}
return AliCaloFitResults( Ret::kInvalid, Ret::kInvalid );
}
void
AliCaloRawAnalyzerKStandard::FitRaw(const Int_t firstTimeBin, const Int_t lastTimeBin, Float_t & amp, Float_t & time, Float_t & chi2, Bool_t & fitDone) const
{
// Fits the raw signal time distribution
int nsamples = lastTimeBin - firstTimeBin + 1;
fitDone = kFALSE;
if (nsamples < 3) { return; }
TGraph *gSig = new TGraph( nsamples);
for (int i=0; iSetPoint(i, timebin, GetReversed(timebin));
}
TF1 * signalF = new TF1("signal", AliEMCALRawResponse::RawResponseFunction, 0, TIMEBINS , 5);
signalF->SetParameters(10.,5., TAU ,ORDER,0.); //set all defaults once, just to be safe
signalF->SetParNames("amp","t0","tau","N","ped");
signalF->FixParameter(2,TAU);
signalF->FixParameter(3,ORDER);
signalF->FixParameter(4, 0);
signalF->SetParameter(1, time);
signalF->SetParameter(0, amp);
signalF->SetParLimits(0, 0.5*amp, 2*amp );
signalF->SetParLimits(1, time - 4, time + 4);
try {
gSig->Fit(signalF, "QROW"); // Note option 'W': equal errors on all points
amp = signalF->GetParameter(0);
time = signalF->GetParameter(1);
chi2 = signalF->GetChisquare();
fitDone = kTRUE;
}
catch (const std::exception & e)
{
AliError( Form("TGraph Fit exception %s", e.what()) );
// stay with default amp and time in case of exception, i.e. no special action required
fitDone = kFALSE;
}
delete signalF;
delete gSig; // delete TGraph
return;
}