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d655d7dd | 1 | /************************************************************************** |
2 | * This file is property of and copyright by * | |
3 | * the Relativistic Heavy Ion Group (RHIG), Yale University, US, 2009 * | |
4 | * * | |
5 | * Primary Author: Per Thomas Hille <p.t.hille@fys.uio.no> * | |
6 | * * | |
7 | * Contributors are mentioned in the code where appropriate. * | |
8 | * Please report bugs to p.t.hille@fys.uio.no * | |
9 | * * | |
10 | * Permission to use, copy, modify and distribute this software and its * | |
11 | * documentation strictly for non-commercial purposes is hereby granted * | |
12 | * without fee, provided that the above copyright notice appears in all * | |
13 | * copies and that both the copyright notice and this permission notice * | |
14 | * appear in the supporting documentation. The authors make no claims * | |
15 | * about the suitability of this software for any purpose. It is * | |
16 | * provided "as is" without express or implied warranty. * | |
17 | **************************************************************************/ | |
18 | ||
19 | ||
20 | // Extraction of amplitude and peak position | |
57839add | 21 | // FRom CALO raw data using |
d655d7dd | 22 | // least square fit for the |
23 | // Moment assuming identical and | |
24 | // independent errors (equivalent with chi square) | |
25 | // | |
26 | ||
57839add | 27 | #include "AliCaloRawAnalyzerLMS.h" |
28 | #include "AliCaloBunchInfo.h" | |
29 | #include "AliCaloFitResults.h" | |
d655d7dd | 30 | #include "AliLog.h" |
31 | #include "TMath.h" | |
507751ce | 32 | #include <stdexcept> |
d655d7dd | 33 | #include <iostream> |
34 | #include "TF1.h" | |
35 | #include "TGraph.h" | |
36 | ||
37 | using namespace std; | |
38 | ||
e37e3c84 | 39 | ClassImp( AliCaloRawAnalyzerLMS ) |
d655d7dd | 40 | |
396baaf6 | 41 | AliCaloRawAnalyzerLMS::AliCaloRawAnalyzerLMS() : AliCaloRawAnalyzerFitter("Chi Square Fit", "LMS") |
d655d7dd | 42 | { |
168c7b3c | 43 | fAlgo = Algo::kLMS; |
d655d7dd | 44 | } |
45 | ||
46 | ||
57839add | 47 | AliCaloRawAnalyzerLMS::~AliCaloRawAnalyzerLMS() |
d655d7dd | 48 | { |
396baaf6 | 49 | // delete fTf1; |
d655d7dd | 50 | } |
51 | ||
52 | ||
57839add | 53 | AliCaloFitResults |
54 | AliCaloRawAnalyzerLMS::Evaluate( const vector<AliCaloBunchInfo> &bunchvector, const UInt_t altrocfg1, const UInt_t altrocfg2 ) | |
d655d7dd | 55 | { |
56 | // Extracting signal parameters using fitting | |
57 | short maxampindex; //index of maximum amplitude | |
58 | short maxamp; //Maximum amplitude | |
59 | int index = SelectBunch( bunchvector, &maxampindex, &maxamp ); | |
60 | ||
61 | if( index >= 0) | |
62 | { | |
63 | Float_t ped = ReverseAndSubtractPed( &(bunchvector.at(index)) , altrocfg1, altrocfg2, fReversed ); | |
d655d7dd | 64 | Float_t maxf = TMath::MaxElement( bunchvector.at(index).GetLength(), fReversed ); |
f57baa2d | 65 | short maxrev = maxampindex - bunchvector.at(index).GetStartBin(); |
507751ce | 66 | // timebinOffset is timebin value at maximum (maxrev) |
f57baa2d | 67 | short timebinOffset = maxampindex - (bunchvector.at(index).GetLength()-1); |
2cd0ffda | 68 | if( maxf < fAmpCut || ( maxamp - ped) > fOverflowCut ) // (maxamp - ped) > fOverflowCut = Close to saturation (use low gain then) |
d655d7dd | 69 | { |
168c7b3c | 70 | return AliCaloFitResults( maxamp, ped, Ret::kCrude, maxf, timebinOffset); |
2cd0ffda | 71 | } |
72 | else if ( maxf >= fAmpCut ) | |
73 | { | |
74 | int first = 0; | |
75 | int last = 0; | |
92d9f317 | 76 | SelectSubarray( fReversed, bunchvector.at(index).GetLength(), maxrev, &first, &last, fFitArrayCut); |
3b8fd9fe | 77 | int nsamples = last - first + 1; |
d655d7dd | 78 | |
f57baa2d | 79 | if( ( nsamples ) >= fNsampleCut ) |
d655d7dd | 80 | { |
507751ce | 81 | Float_t tmax = (maxrev - first); // local tmax estimate |
3b8fd9fe | 82 | TGraph *graph = new TGraph( nsamples, fXaxis, &fReversed[first] ); |
d655d7dd | 83 | fTf1->SetParameter(0, maxf*fkEulerSquared ); |
507751ce | 84 | fTf1->SetParameter(1, tmax - fTau); |
85 | // set rather loose parameter limits | |
86 | fTf1->SetParLimits(0, 0.5*maxf*fkEulerSquared, 2*maxf*fkEulerSquared ); | |
87 | fTf1->SetParLimits(1, tmax - fTau - 4, tmax - fTau + 4); | |
f57baa2d | 88 | |
89 | if (fFixTau) { | |
90 | fTf1->FixParameter(2, fTau); | |
91 | } | |
92 | else { | |
93 | fTf1->ReleaseParameter(2); // allow par. to vary | |
94 | fTf1->SetParameter(2, fTau); | |
95 | } | |
d655d7dd | 96 | |
507751ce | 97 | Short_t tmpStatus = 0; |
98 | try { | |
99 | tmpStatus = graph->Fit(fTf1, "Q0RW"); | |
100 | } | |
101 | catch (const std::exception & e) { | |
102 | AliError( Form("TGraph Fit exception %s", e.what()) ); | |
168c7b3c | 103 | return AliCaloFitResults( maxamp, ped, Ret::kNoFit, maxf, timebinOffset, |
104 | timebinOffset, Ret::kDummy, Ret::kDummy, Ret::kDummy, AliCaloFitSubarray(index, maxrev, first, last) ); | |
507751ce | 105 | } |
106 | ||
d655d7dd | 107 | if( fVerbose == true ) |
108 | { | |
57839add | 109 | AliCaloRawAnalyzer::PrintBunch( bunchvector.at(index) ); |
d655d7dd | 110 | PrintFitResult( fTf1 ) ; |
111 | } | |
507751ce | 112 | // global tmax |
113 | tmax = fTf1->GetParameter(1) + timebinOffset - (maxrev - first) // abs. t0 | |
114 | + fTf1->GetParameter(2); // +tau, makes sum tmax | |
d655d7dd | 115 | |
116 | delete graph; | |
168c7b3c | 117 | return AliCaloFitResults( maxamp, ped , Ret::kFitPar, |
f57baa2d | 118 | fTf1->GetParameter(0)/fkEulerSquared, |
507751ce | 119 | tmax, |
120 | timebinOffset, | |
f57baa2d | 121 | fTf1->GetChisquare(), |
122 | fTf1->GetNDF(), | |
168c7b3c | 123 | Ret::kDummy, AliCaloFitSubarray(index, maxrev, first, last) ); |
d655d7dd | 124 | // delete graph; |
125 | ||
126 | } | |
127 | else | |
128 | { | |
92d9f317 | 129 | |
2cd0ffda | 130 | Float_t chi2 = CalculateChi2(maxf, maxrev, first, last); |
131 | Int_t ndf = last - first - 1; // nsamples - 2 | |
168c7b3c | 132 | return AliCaloFitResults( maxamp, ped, Ret::kCrude, maxf, timebinOffset, |
133 | timebinOffset, chi2, ndf, Ret::kDummy, AliCaloFitSubarray(index, maxrev, first, last) ); | |
d655d7dd | 134 | } |
2cd0ffda | 135 | } // ampcut |
d655d7dd | 136 | } |
168c7b3c | 137 | return AliCaloFitResults( Ret::kInvalid, Ret::kInvalid ); |
d655d7dd | 138 | |
139 | } | |
140 |