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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 | ||
39 | ||
40 | #define BAD 4 //CRAP PTH | |
e37e3c84 | 41 | |
42 | ClassImp( AliCaloRawAnalyzerLMS ) | |
d655d7dd | 43 | |
44 | ||
48a2e3eb | 45 | AliCaloRawAnalyzerLMS::AliCaloRawAnalyzerLMS() : AliCaloRawAnalyzer("Chi Square Fit", "LMS"), |
57839add | 46 | fkEulerSquared(7.389056098930650227), |
f57baa2d | 47 | fTf1(0), |
48 | fTau(2.35), | |
49 | fFixTau(kTRUE) | |
d655d7dd | 50 | { |
51 | //comment | |
52 | for(int i=0; i < MAXSAMPLES; i++) | |
53 | { | |
54 | fXaxis[i] = i; | |
55 | } | |
56 | ||
f57baa2d | 57 | fTf1 = new TF1( "myformula", "[0]*((x - [1])/[2])^2*exp(-2*(x -[1])/[2])", 0, 30 ); |
58 | if (fFixTau) { | |
59 | fTf1->FixParameter(2, fTau); | |
60 | } | |
61 | else { | |
62 | fTf1->ReleaseParameter(2); // allow par. to vary | |
63 | fTf1->SetParameter(2, fTau); | |
64 | } | |
65 | ||
d655d7dd | 66 | } |
67 | ||
68 | ||
57839add | 69 | AliCaloRawAnalyzerLMS::~AliCaloRawAnalyzerLMS() |
d655d7dd | 70 | { |
71 | delete fTf1; | |
72 | } | |
73 | ||
74 | ||
75 | ||
57839add | 76 | AliCaloFitResults |
77 | AliCaloRawAnalyzerLMS::Evaluate( const vector<AliCaloBunchInfo> &bunchvector, const UInt_t altrocfg1, const UInt_t altrocfg2 ) | |
d655d7dd | 78 | { |
79 | // Extracting signal parameters using fitting | |
80 | short maxampindex; //index of maximum amplitude | |
81 | short maxamp; //Maximum amplitude | |
82 | int index = SelectBunch( bunchvector, &maxampindex, &maxamp ); | |
83 | ||
84 | if( index >= 0) | |
85 | { | |
86 | Float_t ped = ReverseAndSubtractPed( &(bunchvector.at(index)) , altrocfg1, altrocfg2, fReversed ); | |
d655d7dd | 87 | Float_t maxf = TMath::MaxElement( bunchvector.at(index).GetLength(), fReversed ); |
f57baa2d | 88 | short maxrev = maxampindex - bunchvector.at(index).GetStartBin(); |
507751ce | 89 | // timebinOffset is timebin value at maximum (maxrev) |
f57baa2d | 90 | short timebinOffset = maxampindex - (bunchvector.at(index).GetLength()-1); |
2cd0ffda | 91 | if( maxf < fAmpCut || ( maxamp - ped) > fOverflowCut ) // (maxamp - ped) > fOverflowCut = Close to saturation (use low gain then) |
d655d7dd | 92 | { |
2cd0ffda | 93 | return AliCaloFitResults( maxamp, ped, AliCaloFitResults::kCrude, maxf, timebinOffset); |
94 | } | |
95 | else if ( maxf >= fAmpCut ) | |
96 | { | |
97 | int first = 0; | |
98 | int last = 0; | |
3b8fd9fe | 99 | SelectSubarray( fReversed, bunchvector.at(index).GetLength(), maxrev, &first, &last); |
100 | int nsamples = last - first + 1; | |
d655d7dd | 101 | |
f57baa2d | 102 | if( ( nsamples ) >= fNsampleCut ) |
d655d7dd | 103 | { |
507751ce | 104 | Float_t tmax = (maxrev - first); // local tmax estimate |
3b8fd9fe | 105 | TGraph *graph = new TGraph( nsamples, fXaxis, &fReversed[first] ); |
d655d7dd | 106 | fTf1->SetParameter(0, maxf*fkEulerSquared ); |
507751ce | 107 | fTf1->SetParameter(1, tmax - fTau); |
108 | // set rather loose parameter limits | |
109 | fTf1->SetParLimits(0, 0.5*maxf*fkEulerSquared, 2*maxf*fkEulerSquared ); | |
110 | fTf1->SetParLimits(1, tmax - fTau - 4, tmax - fTau + 4); | |
f57baa2d | 111 | |
112 | if (fFixTau) { | |
113 | fTf1->FixParameter(2, fTau); | |
114 | } | |
115 | else { | |
116 | fTf1->ReleaseParameter(2); // allow par. to vary | |
117 | fTf1->SetParameter(2, fTau); | |
118 | } | |
d655d7dd | 119 | |
507751ce | 120 | Short_t tmpStatus = 0; |
121 | try { | |
122 | tmpStatus = graph->Fit(fTf1, "Q0RW"); | |
123 | } | |
124 | catch (const std::exception & e) { | |
125 | AliError( Form("TGraph Fit exception %s", e.what()) ); | |
2cd0ffda | 126 | return AliCaloFitResults( maxamp, ped, AliCaloFitResults::kNoFit, maxf, timebinOffset, |
127 | timebinOffset, AliCaloFitResults::kDummy, AliCaloFitResults::kDummy, AliCaloFitResults::kDummy, AliCaloFitSubarray(index, maxrev, first, last) ); | |
507751ce | 128 | } |
129 | ||
d655d7dd | 130 | if( fVerbose == true ) |
131 | { | |
57839add | 132 | AliCaloRawAnalyzer::PrintBunch( bunchvector.at(index) ); |
d655d7dd | 133 | PrintFitResult( fTf1 ) ; |
134 | } | |
507751ce | 135 | // global tmax |
136 | tmax = fTf1->GetParameter(1) + timebinOffset - (maxrev - first) // abs. t0 | |
137 | + fTf1->GetParameter(2); // +tau, makes sum tmax | |
d655d7dd | 138 | |
139 | delete graph; | |
507751ce | 140 | return AliCaloFitResults( maxamp, ped , AliCaloFitResults::kFitPar, |
f57baa2d | 141 | fTf1->GetParameter(0)/fkEulerSquared, |
507751ce | 142 | tmax, |
143 | timebinOffset, | |
f57baa2d | 144 | fTf1->GetChisquare(), |
145 | fTf1->GetNDF(), | |
146 | AliCaloFitResults::kDummy, AliCaloFitSubarray(index, maxrev, first, last) ); | |
147 | ||
d655d7dd | 148 | // delete graph; |
149 | ||
150 | } | |
151 | else | |
152 | { | |
2cd0ffda | 153 | Float_t chi2 = CalculateChi2(maxf, maxrev, first, last); |
154 | Int_t ndf = last - first - 1; // nsamples - 2 | |
155 | return AliCaloFitResults( maxamp, ped, AliCaloFitResults::kCrude, maxf, timebinOffset, | |
156 | timebinOffset, chi2, ndf, AliCaloFitResults::kDummy, AliCaloFitSubarray(index, maxrev, first, last) ); | |
d655d7dd | 157 | } |
2cd0ffda | 158 | } // ampcut |
d655d7dd | 159 | } |
f57baa2d | 160 | return AliCaloFitResults( AliCaloFitResults::kInvalid, AliCaloFitResults::kInvalid ); |
d655d7dd | 161 | |
162 | } | |
163 | ||
164 | ||
165 | void | |
57839add | 166 | AliCaloRawAnalyzerLMS::PrintFitResult(const TF1 *f) const |
d655d7dd | 167 | { |
168 | //comment | |
169 | cout << endl; | |
170 | cout << __FILE__ << __LINE__ << "Using this samplerange we get" << endl; | |
171 | cout << __FILE__ << __LINE__ << "AMPLITUDE = " << f->GetParameter(0)/fkEulerSquared << ",.. !!!!" << endl; | |
172 | cout << __FILE__ << __LINE__ << "TOF = " << f->GetParameter(1) << ",.. !!!!" << endl; | |
173 | cout << __FILE__ << __LINE__ << "NDF = " << f->GetNDF() << ",.. !!!!" << endl; | |
174 | // cout << __FILE__ << __LINE__ << "STATUS = " << f->GetStatus() << ",.. !!!!" << endl << endl; | |
175 | cout << endl << endl; | |
176 | } | |
f57baa2d | 177 |