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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 | { |
168c7b3c | 51 | |
52 | fAlgo = Algo::kLMS; | |
d655d7dd | 53 | //comment |
54 | for(int i=0; i < MAXSAMPLES; i++) | |
55 | { | |
56 | fXaxis[i] = i; | |
57 | } | |
58 | ||
f57baa2d | 59 | fTf1 = new TF1( "myformula", "[0]*((x - [1])/[2])^2*exp(-2*(x -[1])/[2])", 0, 30 ); |
168c7b3c | 60 | if (fFixTau) |
61 | { | |
f57baa2d | 62 | fTf1->FixParameter(2, fTau); |
168c7b3c | 63 | } |
64 | else | |
65 | { | |
66 | fTf1->ReleaseParameter(2); // allow par. to vary | |
67 | fTf1->SetParameter(2, fTau); | |
68 | } | |
d655d7dd | 69 | } |
70 | ||
71 | ||
57839add | 72 | AliCaloRawAnalyzerLMS::~AliCaloRawAnalyzerLMS() |
d655d7dd | 73 | { |
74 | delete fTf1; | |
75 | } | |
76 | ||
77 | ||
78 | ||
57839add | 79 | AliCaloFitResults |
80 | AliCaloRawAnalyzerLMS::Evaluate( const vector<AliCaloBunchInfo> &bunchvector, const UInt_t altrocfg1, const UInt_t altrocfg2 ) | |
d655d7dd | 81 | { |
82 | // Extracting signal parameters using fitting | |
83 | short maxampindex; //index of maximum amplitude | |
84 | short maxamp; //Maximum amplitude | |
85 | int index = SelectBunch( bunchvector, &maxampindex, &maxamp ); | |
86 | ||
87 | if( index >= 0) | |
88 | { | |
89 | Float_t ped = ReverseAndSubtractPed( &(bunchvector.at(index)) , altrocfg1, altrocfg2, fReversed ); | |
d655d7dd | 90 | Float_t maxf = TMath::MaxElement( bunchvector.at(index).GetLength(), fReversed ); |
f57baa2d | 91 | short maxrev = maxampindex - bunchvector.at(index).GetStartBin(); |
507751ce | 92 | // timebinOffset is timebin value at maximum (maxrev) |
f57baa2d | 93 | short timebinOffset = maxampindex - (bunchvector.at(index).GetLength()-1); |
2cd0ffda | 94 | if( maxf < fAmpCut || ( maxamp - ped) > fOverflowCut ) // (maxamp - ped) > fOverflowCut = Close to saturation (use low gain then) |
d655d7dd | 95 | { |
168c7b3c | 96 | return AliCaloFitResults( maxamp, ped, Ret::kCrude, maxf, timebinOffset); |
2cd0ffda | 97 | } |
98 | else if ( maxf >= fAmpCut ) | |
99 | { | |
100 | int first = 0; | |
101 | int last = 0; | |
3b8fd9fe | 102 | SelectSubarray( fReversed, bunchvector.at(index).GetLength(), maxrev, &first, &last); |
103 | int nsamples = last - first + 1; | |
d655d7dd | 104 | |
f57baa2d | 105 | if( ( nsamples ) >= fNsampleCut ) |
d655d7dd | 106 | { |
507751ce | 107 | Float_t tmax = (maxrev - first); // local tmax estimate |
3b8fd9fe | 108 | TGraph *graph = new TGraph( nsamples, fXaxis, &fReversed[first] ); |
d655d7dd | 109 | fTf1->SetParameter(0, maxf*fkEulerSquared ); |
507751ce | 110 | fTf1->SetParameter(1, tmax - fTau); |
111 | // set rather loose parameter limits | |
112 | fTf1->SetParLimits(0, 0.5*maxf*fkEulerSquared, 2*maxf*fkEulerSquared ); | |
113 | fTf1->SetParLimits(1, tmax - fTau - 4, tmax - fTau + 4); | |
f57baa2d | 114 | |
115 | if (fFixTau) { | |
116 | fTf1->FixParameter(2, fTau); | |
117 | } | |
118 | else { | |
119 | fTf1->ReleaseParameter(2); // allow par. to vary | |
120 | fTf1->SetParameter(2, fTau); | |
121 | } | |
d655d7dd | 122 | |
507751ce | 123 | Short_t tmpStatus = 0; |
124 | try { | |
125 | tmpStatus = graph->Fit(fTf1, "Q0RW"); | |
126 | } | |
127 | catch (const std::exception & e) { | |
128 | AliError( Form("TGraph Fit exception %s", e.what()) ); | |
168c7b3c | 129 | return AliCaloFitResults( maxamp, ped, Ret::kNoFit, maxf, timebinOffset, |
130 | timebinOffset, Ret::kDummy, Ret::kDummy, Ret::kDummy, AliCaloFitSubarray(index, maxrev, first, last) ); | |
507751ce | 131 | } |
132 | ||
d655d7dd | 133 | if( fVerbose == true ) |
134 | { | |
57839add | 135 | AliCaloRawAnalyzer::PrintBunch( bunchvector.at(index) ); |
d655d7dd | 136 | PrintFitResult( fTf1 ) ; |
137 | } | |
507751ce | 138 | // global tmax |
139 | tmax = fTf1->GetParameter(1) + timebinOffset - (maxrev - first) // abs. t0 | |
140 | + fTf1->GetParameter(2); // +tau, makes sum tmax | |
d655d7dd | 141 | |
142 | delete graph; | |
168c7b3c | 143 | return AliCaloFitResults( maxamp, ped , Ret::kFitPar, |
f57baa2d | 144 | fTf1->GetParameter(0)/fkEulerSquared, |
507751ce | 145 | tmax, |
146 | timebinOffset, | |
f57baa2d | 147 | fTf1->GetChisquare(), |
148 | fTf1->GetNDF(), | |
168c7b3c | 149 | Ret::kDummy, AliCaloFitSubarray(index, maxrev, first, last) ); |
f57baa2d | 150 | |
d655d7dd | 151 | // delete graph; |
152 | ||
153 | } | |
154 | else | |
155 | { | |
2cd0ffda | 156 | Float_t chi2 = CalculateChi2(maxf, maxrev, first, last); |
157 | Int_t ndf = last - first - 1; // nsamples - 2 | |
168c7b3c | 158 | return AliCaloFitResults( maxamp, ped, Ret::kCrude, maxf, timebinOffset, |
159 | timebinOffset, chi2, ndf, Ret::kDummy, AliCaloFitSubarray(index, maxrev, first, last) ); | |
d655d7dd | 160 | } |
2cd0ffda | 161 | } // ampcut |
d655d7dd | 162 | } |
168c7b3c | 163 | return AliCaloFitResults( Ret::kInvalid, Ret::kInvalid ); |
d655d7dd | 164 | |
165 | } | |
166 | ||
167 | ||
168 | void | |
57839add | 169 | AliCaloRawAnalyzerLMS::PrintFitResult(const TF1 *f) const |
d655d7dd | 170 | { |
171 | //comment | |
172 | cout << endl; | |
173 | cout << __FILE__ << __LINE__ << "Using this samplerange we get" << endl; | |
174 | cout << __FILE__ << __LINE__ << "AMPLITUDE = " << f->GetParameter(0)/fkEulerSquared << ",.. !!!!" << endl; | |
175 | cout << __FILE__ << __LINE__ << "TOF = " << f->GetParameter(1) << ",.. !!!!" << endl; | |
176 | cout << __FILE__ << __LINE__ << "NDF = " << f->GetNDF() << ",.. !!!!" << endl; | |
177 | // cout << __FILE__ << __LINE__ << "STATUS = " << f->GetStatus() << ",.. !!!!" << endl << endl; | |
178 | cout << endl << endl; | |
179 | } | |
f57baa2d | 180 |