1 /**************************************************************************
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2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
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4 * Author: The ALICE Off-line Project. *
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5 * Contributors are mentioned in the code where appropriate. *
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7 * Permission to use, copy, modify and distribute this software and its *
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8 * documentation strictly for non-commercial purposes is hereby granted *
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9 * without fee, provided that the above copyright notice appears in all *
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10 * copies and that both the copyright notice and this permission notice *
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11 * appear in the supporting documentation. The authors make no claims *
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12 * about the suitability of this software for any purpose. It is *
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13 * provided "as is" without express or implied warranty. *
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14 **************************************************************************/
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16 //_________________________________________________________________________
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17 // Base class for the cluster unfolding algorithm
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18 //*-- Author: Adam Matyja (SUBATECH)
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19 // Based on unfolding in clusterizerv1 done by Cynthia Hadjidakis
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20 //-- Unfolding for eta~0: Cynthia Hadjidakis - still in AliEMCALCLusterizerv1
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21 //-- Unfolding extension for whole EMCAL: Adam Matyja (SUBATECH & INP PAN)
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23 // unfolds the clusters having several local maxima.
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24 //////////////////////////////////////////////////////////////////////////////
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26 // --- ROOT system ---
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27 #include "TClonesArray.h"
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28 //#include "TTree.h"
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29 //#include <TFile.h>
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32 #include <TMinuit.h>
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33 //#include <TTree.h>
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35 //#include <TBenchmark.h>
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36 //#include <TBrowser.h>
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37 //#include <TROOT.h>
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39 // --- Standard library ---
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42 // --- AliRoot header files ---
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43 #include "AliEMCALUnfolding.h"
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44 #include "AliEMCALGeometry.h"
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45 #include "AliRunLoader.h"
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47 #include "AliEMCAL.h"
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48 #include "AliEMCALRecParam.h"
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49 #include "AliEMCALRecPoint.h"
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50 #include "AliEMCALDigit.h"
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51 #include "AliEMCALReconstructor.h"
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52 //#include "AliEMCALClusterizer.h"
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58 #include "AliCDBManager.h"
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59 //#include "AliCaloCalibPedestal.h"
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60 //#include "AliEMCALCalibData.h"
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61 class AliCDBStorage;
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62 #include "AliCDBEntry.h"
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64 Double_t AliEMCALUnfolding::fSSPars[8]={0.9262,3.365,1.548,0.1625,-0.4195,0.,0.,2.332};
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65 Double_t AliEMCALUnfolding::fPar5[3]={12.31,-0.007381,-0.06936};
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66 Double_t AliEMCALUnfolding::fPar6[3]={0.05452,0.0001228,0.001361};
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68 ClassImp(AliEMCALUnfolding)
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70 //____________________________________________________________________________
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71 AliEMCALUnfolding::AliEMCALUnfolding():
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72 fNumberOfECAClusters(0),
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78 // ctor with the indication of the file where header Tree and digits Tree are stored
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83 //____________________________________________________________________________
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84 AliEMCALUnfolding::AliEMCALUnfolding(AliEMCALGeometry* geometry):
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85 fNumberOfECAClusters(0),
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91 // ctor with the indication of the file where header Tree and digits Tree are stored
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92 // use this contructor to avoid usage of Init() which uses runloader
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93 // change needed by HLT - MP
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96 AliFatal("AliEMCALUnfolding: Geometry not initialized.");
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101 //____________________________________________________________________________
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102 AliEMCALUnfolding::AliEMCALUnfolding(AliEMCALGeometry* geometry,Float_t ECALocMaxCut,Double_t *SSPars,Double_t *Par5,Double_t *Par6):
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103 fNumberOfECAClusters(0),
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104 fECALocMaxCut(ECALocMaxCut),
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109 // ctor with the indication of the file where header Tree and digits Tree are stored
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110 // use this contructor to avoid usage of Init() which uses runloader
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111 // change needed by HLT - MP
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114 AliFatal("AliEMCALUnfolding: Geometry not initialized.");
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117 for (i = 0; i < 8; i++) fSSPars[i] = SSPars[i];
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118 for (i = 0; i < 3; i++) {
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119 fPar5[i] = Par5[i];
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120 fPar6[i] = Par6[i];
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125 //____________________________________________________________________________
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126 void AliEMCALUnfolding::Init()
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128 // Make all memory allocations which can not be done in default constructor.
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129 // Attach the Clusterizer task to the list of EMCAL tasks
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131 AliRunLoader *rl = AliRunLoader::Instance();
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132 if (rl->GetAliRun()){
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133 AliEMCAL* emcal = dynamic_cast<AliEMCAL*>(rl->GetAliRun()->GetDetector("EMCAL"));
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134 if(emcal)fGeom = emcal->GetGeometry();
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138 fGeom = AliEMCALGeometry::GetInstance(AliEMCALGeometry::GetDefaultGeometryName());
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140 AliDebug(1,Form("geom %p",fGeom));
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143 gMinuit = new TMinuit(100) ;
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147 //____________________________________________________________________________
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148 AliEMCALUnfolding::~AliEMCALUnfolding()
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153 //____________________________________________________________________________
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154 void AliEMCALUnfolding::SetInput(Int_t numberOfECAClusters,TObjArray *recPoints,TClonesArray *digitsArr)
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157 //Set input for unfolding purposes
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158 SetNumberOfECAClusters(numberOfECAClusters);
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159 SetRecPoints(recPoints);
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160 SetDigitsArr(digitsArr);
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163 //____________________________________________________________________________
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164 void AliEMCALUnfolding::MakeUnfolding()
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166 // Unfolds clusters using the shape of an ElectroMagnetic shower
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167 // Performs unfolding of all clusters
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169 if(fNumberOfECAClusters > 0){
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171 AliFatal("Did not get geometry from EMCALLoader") ;
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172 //Int_t nModulesToUnfold = fGeom->GetNCells();
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174 Int_t numberofNotUnfolded = fNumberOfECAClusters ;
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176 for(index = 0 ; index < numberofNotUnfolded ; index++){
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177 AliEMCALRecPoint * recPoint = dynamic_cast<AliEMCALRecPoint *>( fRecPoints->At(index) ) ;
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179 //do we really need it?
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181 // Int_t absId = -1;
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182 // recPoint->GetGlobalPosition(gpos);
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183 // fGeom->GetAbsCellIdFromEtaPhi(gpos.Eta(),gpos.Phi(),absId);
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184 // if(absId > nModulesToUnfold)
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187 Int_t nMultipl = recPoint->GetMultiplicity() ;
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188 AliEMCALDigit ** maxAt = new AliEMCALDigit*[nMultipl] ;
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189 Float_t * maxAtEnergy = new Float_t[nMultipl] ;
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190 Int_t nMax = recPoint->GetNumberOfLocalMax(maxAt, maxAtEnergy,fECALocMaxCut,fDigitsArr) ;
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192 if( nMax > 1 ) { // if cluster is very flat (no pronounced maximum) then nMax = 0
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193 if(UnfoldClusterV2(recPoint, nMax, maxAt, maxAtEnergy) ){
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194 fRecPoints->Remove(recPoint);
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195 fRecPoints->Compress() ;//is it really needed
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197 fNumberOfECAClusters-- ;
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198 numberofNotUnfolded-- ;
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202 recPoint->SetNExMax(1) ; //Only one local maximum
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206 delete[] maxAtEnergy ;
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209 // End of Unfolding of clusters
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212 //____________________________________________________________________________
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213 Bool_t AliEMCALUnfolding::UnfoldClusterV2(AliEMCALRecPoint * iniTower,
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215 AliEMCALDigit ** maxAt,
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216 Float_t * maxAtEnergy)
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218 // Extended to whole EMCAL
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219 // Performs the unfolding of a cluster with nMax overlapping showers
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221 Int_t nPar = 3 * nMax ;
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222 Float_t * fitparameters = new Float_t[nPar] ;
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225 AliFatal("Did not get geometry from EMCALLoader") ;
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227 Bool_t rv = FindFitV2(iniTower, maxAt, maxAtEnergy, nPar, fitparameters) ;
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229 // Fit failed, return (and remove cluster? - why? I leave the cluster)
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230 iniTower->SetNExMax(-1) ;
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231 delete[] fitparameters ;
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235 // create unfolded rec points and fill them with new energy lists
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236 // First calculate energy deposited in each sell in accordance with
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237 // fit (without fluctuations): efit[]
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238 // and later correct this number in acordance with actual energy
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241 Int_t nDigits = iniTower->GetMultiplicity() ;
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242 Float_t * efit = new Float_t[nDigits] ;//new fitted energy in cells
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243 Float_t xpar=0.,zpar=0.,epar=0. ;//center of gravity in cell units
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245 AliEMCALDigit * digit = 0 ;
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246 Int_t * digitsList = iniTower->GetDigitsList() ;
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248 Int_t iSupMod = 0 ;
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252 Int_t iphi = 0 ;//x direction
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253 Int_t ieta = 0 ;//z direstion
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258 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
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259 digit = dynamic_cast<AliEMCALDigit*>( fDigitsArr->At(digitsList[iDigit] ) ) ;
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260 fGeom->GetCellIndex(digit->GetId(),iSupMod,iTower,iIphi,iIeta);
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261 fGeom->GetCellPhiEtaIndexInSModule(iSupMod,iTower,
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262 iIphi, iIeta,iphi,ieta);
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263 EvalParsPhiDependence(digit->GetId(),fGeom);
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267 while(iparam < nPar ){
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268 xpar = fitparameters[iparam] ;
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269 zpar = fitparameters[iparam+1] ;
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270 epar = fitparameters[iparam+2] ;
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273 efit[iDigit] += epar * ShowerShapeV2((Float_t)iphi - xpar,(Float_t)ieta - zpar) ;
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278 // Now create new RecPoints and fill energy lists with efit corrected to fluctuations
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279 // so that energy deposited in each cell is distributed between new clusters proportionally
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280 // to its contribution to efit
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282 Float_t * energiesList = iniTower->GetEnergiesList() ;
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283 Float_t ratio = 0 ;
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286 while(iparam < nPar ){
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287 xpar = fitparameters[iparam] ;
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288 zpar = fitparameters[iparam+1] ;
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289 epar = fitparameters[iparam+2] ;
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292 AliEMCALRecPoint * recPoint = 0 ;
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294 if(fNumberOfECAClusters >= fRecPoints->GetSize())
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295 fRecPoints->Expand(2*fNumberOfECAClusters) ;
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298 (*fRecPoints)[fNumberOfECAClusters] = new AliEMCALRecPoint("") ;
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299 recPoint = dynamic_cast<AliEMCALRecPoint *>( fRecPoints->At(fNumberOfECAClusters) ) ;
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300 fNumberOfECAClusters++ ;
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301 recPoint->SetNExMax((Int_t)nPar/3) ;
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303 Float_t eDigit = 0. ;
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304 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
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305 digit = dynamic_cast<AliEMCALDigit*>( fDigitsArr->At( digitsList[iDigit] ) ) ;
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306 fGeom->GetCellIndex(digit->GetId(),iSupMod,iTower,iIphi,iIeta);
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307 fGeom->GetCellPhiEtaIndexInSModule(iSupMod,iTower,
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308 iIphi, iIeta,iphi,ieta);
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309 EvalParsPhiDependence(digit->GetId(),fGeom);
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310 if(efit[iDigit]==0) continue;//just for sure
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311 ratio = epar * ShowerShapeV2((Float_t)iphi - xpar,(Float_t)ieta - zpar) / efit[iDigit] ;
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312 eDigit = energiesList[iDigit] * ratio ;
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313 recPoint->AddDigit( *digit, eDigit, kFALSE ) ; //FIXME, need to study the shared case
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318 delete[] fitparameters ;
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324 //____________________________________________________________________________
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325 Bool_t AliEMCALUnfolding::FindFitV2(AliEMCALRecPoint * recPoint, AliEMCALDigit ** maxAt,
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326 const Float_t* maxAtEnergy,
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327 Int_t nPar, Float_t * fitparameters) const
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329 // Calls TMinuit to fit the energy distribution of a cluster with several maxima
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330 // The initial values for fitting procedure are set equal to the
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331 // positions of local maxima.
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332 // Cluster will be fitted as a superposition of nPar/3
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333 // electromagnetic showers
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335 cout<<"inside FindFitV2"<<endl;
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337 if (fGeom==0) AliFatal("Did not get geometry from EMCALLoader");
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340 gMinuit = new TMinuit(100) ;//max 100 parameters
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342 gMinuit->mncler(); // Reset Minuit's list of paramters
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343 gMinuit->SetPrintLevel(-1) ; // No Printout
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344 gMinuit->SetFCN(AliEMCALUnfolding::UnfoldingChiSquareV2) ;
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345 // To set the address of the minimization function
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346 TList * toMinuit = new TList();
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347 toMinuit->AddAt(recPoint,0) ;
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348 toMinuit->AddAt(fDigitsArr,1) ;
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349 toMinuit->AddAt(fGeom,2) ;
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351 gMinuit->SetObjectFit(toMinuit) ; // To tranfer pointer to UnfoldingChiSquare
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353 // filling initial values for fit parameters
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354 AliEMCALDigit * digit ;
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358 Int_t nDigits = (Int_t) nPar / 3 ;
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362 Int_t iSupMod = 0 ;
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366 Int_t iphi = 0 ;//x direction
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367 Int_t ieta = 0 ;//z direstion
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369 for(iDigit = 0; iDigit < nDigits; iDigit++){
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370 digit = maxAt[iDigit];
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371 fGeom->GetCellIndex(digit->GetId(),iSupMod,iTower,iIphi,iIeta);
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372 fGeom->GetCellPhiEtaIndexInSModule(iSupMod,iTower,
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373 iIphi, iIeta,iphi,ieta);
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375 Float_t energy = maxAtEnergy[iDigit] ;
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377 //gMinuit->mnparm(index, "x", iphi, 0.1, 0, 0, ierflg) ;//original
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378 gMinuit->mnparm(index, "x", iphi, 0.05, 0, 0, ierflg) ;
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381 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : x = %d", iphi ) ;
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386 //gMinuit->mnparm(index, "z", ieta, 0.1, 0, 0, ierflg) ;//original
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387 gMinuit->mnparm(index, "z", ieta, 0.05, 0, 0, ierflg) ;
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390 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : z = %d", ieta) ;
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395 //gMinuit->mnparm(index, "Energy", energy , 0.05*energy, 0., 4.*energy, ierflg) ;//original
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396 gMinuit->mnparm(index, "Energy", energy , 0.001*energy, 0., 5.*energy, ierflg) ;//was 0.05
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399 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : energy = %f", energy) ;
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406 Double_t p0 = 0.1 ; // "Tolerance" Evaluation stops when EDM = 0.0001*p0 ;
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407 // The number of function call slightly depends on it.
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408 // Double_t p1 = 1.0 ;// par to gradient
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409 Double_t p2 = 0.0 ;
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410 // Double_t p3 = 3.0 ;
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411 gMinuit->mnexcm("SET STR", &p2, 0, ierflg) ; // force TMinuit to reduce function calls
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412 // gMinuit->mnexcm("SET GRA", &p1, 1, ierflg) ; // force TMinuit to use my gradient
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413 gMinuit->SetMaxIterations(5);//was 5
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414 gMinuit->mnexcm("SET NOW", &p2 , 0, ierflg) ; // No Warnings
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415 //gMinuit->mnexcm("SET PRI", &p3 , 3, ierflg) ; // printouts
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417 gMinuit->mnexcm("MIGRAD", &p0, 0, ierflg) ; // minimize
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418 //gMinuit->mnexcm("MINI", &p0, 0, ierflg) ; // minimize
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419 if(ierflg == 4){ // Minimum not found
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420 Error("FindFit", "EMCAL Unfolding Fit not converged, cluster abandoned " ) ;
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425 for(index = 0; index < nPar; index++){
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426 Double_t err = 0. ;
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427 Double_t val = 0. ;
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428 gMinuit->GetParameter(index, val, err) ; // Returns value and error of parameter index
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429 fitparameters[index] = val ;
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438 //____________________________________________________________________________
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439 Double_t AliEMCALUnfolding::ShowerShapeV2(Double_t x, Double_t y)
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441 // extended to whole EMCAL
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442 // Shape of the shower
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443 // If you change this function, change also the gradient evaluation in ChiSquare()
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445 Double_t r = fSSPars[7]*TMath::Sqrt(x*x+y*y);
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446 Double_t rp1 = TMath::Power(r, fSSPars[1]) ;
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447 Double_t rp5 = TMath::Power(r, fSSPars[5]) ;
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448 Double_t shape = fSSPars[0]*TMath::Exp( -rp1 * (1. / (fSSPars[2] + fSSPars[3] * rp1) + fSSPars[4] / (1 + fSSPars[6] * rp5) ) ) ;
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452 //____________________________________________________________________________
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453 void AliEMCALUnfolding::UnfoldingChiSquareV2(Int_t & nPar, Double_t * Grad,
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455 Double_t * x, Int_t iflag)
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457 // Calculates the Chi square for the cluster unfolding minimization
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458 // Number of parameters, Gradient, Chi squared, parameters, what to do
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460 TList * toMinuit = dynamic_cast<TList*>( gMinuit->GetObjectFit() ) ;
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462 AliEMCALRecPoint * recPoint = dynamic_cast<AliEMCALRecPoint*>( toMinuit->At(0) ) ;
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463 TClonesArray * digits = dynamic_cast<TClonesArray*>( toMinuit->At(1) ) ;
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464 // A bit buggy way to get an access to the geometry
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466 AliEMCALGeometry *geom = dynamic_cast<AliEMCALGeometry *>(toMinuit->At(2));
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468 Int_t * digitsList = recPoint->GetDigitsList() ;
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470 Int_t nOdigits = recPoint->GetDigitsMultiplicity() ;
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472 Float_t * energiesList = recPoint->GetEnergiesList() ;
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478 for(iparam = 0 ; iparam < nPar ; iparam++)
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479 Grad[iparam] = 0 ; // Will evaluate gradient
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481 Double_t efit = 0. ;
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483 AliEMCALDigit * digit ;
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486 Int_t iSupMod = 0 ;
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490 Int_t iphi = 0 ;//x direction
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491 Int_t ieta = 0 ;//z direstion
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494 for( iDigit = 0 ; iDigit < nOdigits ; iDigit++) {
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495 if(energiesList[iDigit]==0) continue;
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497 digit = dynamic_cast<AliEMCALDigit*>( digits->At( digitsList[iDigit] ) );
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499 geom->GetCellIndex(digit->GetId(),iSupMod,iTower,iIphi,iIeta);
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500 geom->GetCellPhiEtaIndexInSModule(iSupMod,iTower,
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501 iIphi, iIeta,iphi,ieta);
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502 EvalParsPhiDependence(digit->GetId(),geom);
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504 if(iflag == 2){ // calculate gradient
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507 while(iParam < nPar ){
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508 Double_t dx = ((Float_t)iphi - x[iParam]) ;
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510 Double_t dz = ((Float_t)ieta - x[iParam]) ;
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512 efit += x[iParam] * ShowerShapeV2(dx,dz) ;
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516 Double_t sum = 2. * (efit - energiesList[iDigit]) / energiesList[iDigit] ; // Here we assume, that sigma = sqrt(E)
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518 while(iParam < nPar ){
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519 Double_t xpar = x[iParam] ;
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520 Double_t zpar = x[iParam+1] ;
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521 Double_t epar = x[iParam+2] ;
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523 Double_t dr = fSSPars[7]*TMath::Sqrt( ((Float_t)iphi - xpar) * ((Float_t)iphi - xpar) + ((Float_t)ieta - zpar) * ((Float_t)ieta - zpar) );
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524 Double_t shape = sum * ShowerShapeV2((Float_t)iphi - xpar,(Float_t)ieta - zpar) ;
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525 Double_t rp1 = TMath::Power(dr, fSSPars[1]) ;
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526 Double_t rp5 = TMath::Power(dr, fSSPars[5]) ;
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528 Double_t deriv = -2 * TMath::Power(dr,fSSPars[1]-2.) * fSSPars[7] * fSSPars[7] *
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529 (fSSPars[1] * ( 1/(fSSPars[2]+fSSPars[3]*rp1) + fSSPars[4]/(1+fSSPars[6]*rp5) ) -
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530 (fSSPars[1]*fSSPars[3]*rp1/( (fSSPars[2]+fSSPars[3]*rp1)*(fSSPars[2]+fSSPars[3]*rp1) ) +
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531 fSSPars[4]*fSSPars[5]*fSSPars[6]*rp5/( (1+fSSPars[6]*rp5)*(1+fSSPars[6]*rp5) ) ) );
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533 //Double_t deriv =-1.33 * TMath::Power(dr,0.33)*dr * ( 1.57 / ( (1.57 + 0.0860 * r133) * (1.57 + 0.0860 * r133) )
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534 // - 0.55 / (1 + 0.000563 * r669) / ( (1 + 0.000563 * r669) * (1 + 0.000563 * r669) ) ) ;
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536 Grad[iParam] += epar * shape * deriv * ((Float_t)iphi - xpar) ; // Derivative over x
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538 Grad[iParam] += epar * shape * deriv * ((Float_t)ieta - zpar) ; // Derivative over z
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540 Grad[iParam] += shape ; // Derivative over energy
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547 while(iparam < nPar ){
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548 Double_t xpar = x[iparam] ;
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549 Double_t zpar = x[iparam+1] ;
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550 Double_t epar = x[iparam+2] ;
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552 efit += epar * ShowerShapeV2((Float_t)iphi - xpar,(Float_t)ieta - zpar) ;
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555 fret += (efit-energiesList[iDigit])*(efit-energiesList[iDigit])/energiesList[iDigit] ;
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556 // Here we assume, that sigma = sqrt(E)
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562 //____________________________________________________________________________
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563 void AliEMCALUnfolding::SetShowerShapeParams(Double_t *pars){
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564 for(UInt_t i=0;i<7;++i)
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565 fSSPars[i]=pars[i];
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566 if(pars[2]==0. && pars[3]==0.) fSSPars[2]=1.;//to avoid dividing by 0
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569 //____________________________________________________________________________
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570 void AliEMCALUnfolding::SetPar5(Double_t *pars){
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571 for(UInt_t i=0;i<3;++i)
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575 //____________________________________________________________________________
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576 void AliEMCALUnfolding::SetPar6(Double_t *pars){
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577 for(UInt_t i=0;i<3;++i)
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581 //____________________________________________________________________________
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582 void AliEMCALUnfolding::EvalPar5(Double_t phi){
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584 //Evaluate the 5th parameter of the shower shape function
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585 //phi in degrees range (-10,10)
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587 //fSSPars[5] = 12.31 - phi*0.007381 - phi*phi*0.06936;
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588 fSSPars[5] = fPar5[0] + phi * fPar5[1] + phi*phi * fPar5[2];
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591 //____________________________________________________________________________
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592 void AliEMCALUnfolding::EvalPar6(Double_t phi){
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594 //Evaluate the 6th parameter of the shower shape function
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595 //phi in degrees range (-10,10)
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597 //fSSPars[6] = 0.05452 + phi*0.0001228 + phi*phi*0.001361;
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598 fSSPars[6] = fPar6[0] + phi * fPar6[1] + phi*phi * fPar6[2];
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601 //____________________________________________________________________________
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602 void AliEMCALUnfolding::EvalParsPhiDependence(Int_t absId, AliEMCALGeometry *geom){
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604 // calculate params p5 and p6 depending on the phi angle in global coordinate
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605 // for the cell with given absId index
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607 Double_t etaGlob = 0.;//eta in global c.s. - unused
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608 Double_t phiGlob = 0.;//phi in global c.s. in radians
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609 geom->EtaPhiFromIndex(absId, etaGlob, phiGlob);
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610 phiGlob*=180./TMath::Pi();
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612 phiGlob-= (Double_t)((Int_t)geom->GetSuperModuleNumber(absId)/2 * 20);
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