| 1 | /* ======================================================================== *\
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| 2 | !
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| 3 | ! *
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| 4 | ! * This file is part of MARS, the MAGIC Analysis and Reconstruction
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| 5 | ! * Software. It is distributed to you in the hope that it can be a useful
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| 6 | ! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
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| 7 | ! * It is distributed WITHOUT ANY WARRANTY.
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| 8 | ! *
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| 9 | ! * Permission to use, copy, modify and distribute this software and its
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| 10 | ! * documentation for any purpose is hereby granted without fee,
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| 11 | ! * provided that the above copyright notice appear in all copies and
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| 12 | ! * that both that copyright notice and this permission notice appear
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| 13 | ! * in supporting documentation. It is provided "as is" without express
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| 14 | ! * or implied warranty.
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| 15 | ! *
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| 16 | !
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| 17 | !
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| 18 | ! Author(s): Thomas Bretz, 5/2002 <mailto:tbretz@astro.uni-wuerzburg.de>
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| 19 | ! Author(s): Abelardo Moralejo <mailto:moralejo@pd.infn.it>
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| 20 | !
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| 21 | ! Copyright: MAGIC Software Development, 2000-2003
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| 22 | !
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| 23 | !
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| 24 | \* ======================================================================== */
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| 25 |
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| 26 | /////////////////////////////////////////////////////////////////////////////
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| 27 | //
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| 28 | // MHHadronness
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| 29 | //
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| 30 | // This is histogram is a way to evaluate the quality of a gamma/hadron
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| 31 | // seperation method. It is filled from a MHadronness container, which
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| 32 | // stores a hadroness for the current event. The Value must be in the
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| 33 | // range [0,1]. To fill the histograms correctly the information
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| 34 | // whether it is a gamma or hadron (not a gamma) must be available from
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| 35 | // a MMcEvt container.
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| 36 | //
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| 37 | // In the constructor you can change the number of used bns for the
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| 38 | // evaluation.
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| 39 | //
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| 40 | // The meaning of the histograms (Draw, DrawClone) are the following:
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| 41 | // * Upper Left Corner:
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| 42 | // - black: histogram of all hadronesses for gammas
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| 43 | // - red: histogram of all hadronesses for non gammas
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| 44 | // * Upper Right Corner:
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| 45 | // - black: acceptance of gammas (Ag) vs. the hadroness
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| 46 | // - red: acceptance of non gammas (Ah) vs. the hadroness
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| 47 | // * Bottom Left Corner:
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| 48 | // Naive quality factor: Ag/sqrt(Ah)
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| 49 | // * Bottom Right Corner:
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| 50 | // - black: Acceprtance Gammas vs. Acceptance Hadrons
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| 51 | // - blue cross: minimum of distance to (0, 1)
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| 52 | //
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| 53 | // As a default MHHadronness searches for the container "MHadronness".
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| 54 | // This can be overwritten by a different pointer specified in the
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| 55 | // Fill function (No type check is done!) Use a different name in
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| 56 | // MFillH.
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| 57 | //
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| 58 | ////////////////////////////////////////////////////////////////////////////
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| 59 | #include "MHHadronness.h"
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| 60 |
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| 61 | #include <TPad.h>
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| 62 | #include <TGraph.h>
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| 63 | #include <TStyle.h>
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| 64 | #include <TCanvas.h>
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| 65 | #include <TMarker.h>
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| 66 |
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| 67 | #include "MLog.h"
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| 68 | #include "MLogManip.h"
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| 69 |
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| 70 | #include "MParList.h"
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| 71 | #include "MBinning.h"
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| 72 | #include "MHadronness.h"
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| 73 |
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| 74 | #include "MMcEvt.hxx"
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| 75 |
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| 76 | ClassImp(MHHadronness);
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| 77 |
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| 78 | // --------------------------------------------------------------------------
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| 79 | //
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| 80 | // Setup histograms, nbins is the number of bins used for the evaluation.
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| 81 | // The default is 100 bins.
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| 82 | //
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| 83 | MHHadronness::MHHadronness(Int_t nbins, const char *name, const char *title)
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| 84 | {
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| 85 | //
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| 86 | // set the name and title of this object
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| 87 | //
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| 88 | fName = name ? name : "MHHadronness";
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| 89 | fTitle = title ? title : "Gamma/Hadron Separation Quality Histograms";
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| 90 |
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| 91 | fGraph = new TGraph;
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| 92 | fGraph->SetTitle("Acceptance Gammas vs. Hadrons");
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| 93 | fGraph->SetMaximum(1);
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| 94 |
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| 95 | fGhness = new TH1D("Ghness", "Hadronness", nbins, 0, 1);
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| 96 | fPhness = new TH1D("Phness", "Hadronness", nbins, 0, 1);
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| 97 | fGhness->SetXTitle("Hadronness");
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| 98 | fPhness->SetXTitle("Hadronness");
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| 99 | fGhness->SetYTitle("Counts");
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| 100 | fPhness->SetYTitle("Counts");
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| 101 |
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| 102 | fIntGhness = new TH1D("AccGammas", "Acceptance", nbins, 0, 1);
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| 103 | fIntPhness = new TH1D("AccHadrons", "Acceptance", nbins, 0, 1);
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| 104 | fIntGhness->SetXTitle("Hadronness");
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| 105 | fIntPhness->SetXTitle("Hadronness");
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| 106 | fIntGhness->SetYTitle("Acceptance");
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| 107 | fIntPhness->SetYTitle("Acceptance");
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| 108 |
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| 109 | fQfac = new TGraph;
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| 110 | fQfac->SetTitle(" Naive Quality factor ");
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| 111 |
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| 112 | fGhness->SetDirectory(NULL);
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| 113 | fPhness->SetDirectory(NULL);
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| 114 | fIntGhness->SetDirectory(NULL);
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| 115 | fIntPhness->SetDirectory(NULL);
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| 116 | }
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| 117 |
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| 118 | // --------------------------------------------------------------------------
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| 119 | //
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| 120 | // Delete the histograms.
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| 121 | //
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| 122 | MHHadronness::~MHHadronness()
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| 123 | {
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| 124 | delete fGhness;
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| 125 | delete fIntGhness;
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| 126 | delete fPhness;
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| 127 | delete fIntPhness;
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| 128 | delete fQfac;
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| 129 | delete fGraph;
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| 130 | }
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| 131 |
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| 132 | // --------------------------------------------------------------------------
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| 133 | //
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| 134 | // Setup Filling of the histograms. It needs:
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| 135 | // MMcEvt and MHadronness
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| 136 | //
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| 137 | Bool_t MHHadronness::SetupFill(const MParList *plist)
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| 138 | {
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| 139 | fMcEvt = (MMcEvt*)plist->FindObject("MMcEvt");
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| 140 | if (!fMcEvt)
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| 141 | {
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| 142 | *fLog << err << dbginf << "MMcEvt not found... aborting." << endl;
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| 143 | return kFALSE;
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| 144 | }
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| 145 |
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| 146 | fHadronness = (MHadronness*)plist->FindObject("MHadronness");
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| 147 |
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| 148 | /*
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| 149 | MBinning* bins = (MBinning*)plist->FindObject("BinningHadronness");
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| 150 | if (!bins)
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| 151 | {
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| 152 | *fLog << err << dbginf << "BinningHadronness [MBinning] not found... aborting." << endl;
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| 153 | return kFALSE;
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| 154 | }
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| 155 |
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| 156 | SetBinning(&fHist, binsalpha, binsenergy, binstheta);
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| 157 |
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| 158 | fHist.Sumw2();
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| 159 | */
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| 160 |
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| 161 | return kTRUE;
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| 162 | }
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| 163 |
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| 164 | // --------------------------------------------------------------------------
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| 165 | //
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| 166 | // Fill the Hadronness from a MHadronness container into the corresponding
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| 167 | // histogram dependant on the particle id.
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| 168 | //
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| 169 | // Every particle Id different than kGAMMA is considered a hadron.
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| 170 | //
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| 171 | // If you call Fill with a pointer (eg. from MFillH) this container is
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| 172 | // used as a hadronness (Warning: No type check is done!) otherwise
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| 173 | // the default is used ("MHadronness")
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| 174 | //
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| 175 | // Sometimes a distance is calculated as NaN (not a number). Such events
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| 176 | // are skipped at the moment.
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| 177 | //
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| 178 | Bool_t MHHadronness::Fill(const MParContainer *par)
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| 179 | {
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| 180 | // Preliminary Workaround: FIXME!
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| 181 | if (!par && !fHadronness)
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| 182 | {
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| 183 | *fLog << err << "MHHadronness::Fill: No MHadronness container specified!" << endl;
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| 184 | return kFALSE;
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| 185 | }
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| 186 |
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| 187 | const MHadronness &had = par ? *(MHadronness*)par : *fHadronness;
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| 188 |
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| 189 | const Double_t h = had.GetHadronness();
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| 190 |
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| 191 | if (TMath::IsNaN(h))
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| 192 | return kCONTINUE;
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| 193 |
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| 194 | if (fMcEvt->GetPartId()==kGAMMA)
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| 195 | fGhness->Fill(h);
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| 196 | else
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| 197 | fPhness->Fill(h);
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| 198 |
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| 199 | return kTRUE;
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| 200 | }
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| 201 |
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| 202 | Float_t MHHadronness::GetQ05() const
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| 203 | {
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| 204 | Int_t n = fQfac->GetN();
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| 205 |
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| 206 | Double_t val1x=0;
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| 207 | Double_t val2x=1;
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| 208 |
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| 209 | Double_t val1y=0;
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| 210 | Double_t val2y=0;
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| 211 |
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| 212 | for (Int_t i=1; i<=n; i++)
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| 213 | {
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| 214 | Double_t x, y;
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| 215 |
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| 216 | fQfac->GetPoint(i, x, y);
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| 217 |
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| 218 | if (x<0.5 && x>val1x)
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| 219 | {
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| 220 | val1x = x;
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| 221 | val1y = y;
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| 222 | }
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| 223 |
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| 224 | if (x>0.5 && x<val2x)
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| 225 | {
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| 226 | val2x = x;
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| 227 | val2y = y;
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| 228 | }
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| 229 | }
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| 230 |
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| 231 | return val2x-val1x == 0 ? 0 : val1y - (val2y-val1y)/(val2x-val1x) * (val1x-0.5);
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| 232 | }
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| 233 |
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| 234 | // --------------------------------------------------------------------------
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| 235 | //
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| 236 | // Finalize the histograms:
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| 237 | // - integrate the hadroness histograms --> acceptance
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| 238 | // - fill the Minimum Distance histogram (formular see class description)
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| 239 | // - fill the Quality histogram (formular see class description)
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| 240 | //
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| 241 | Bool_t MHHadronness::Finalize()
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| 242 | {
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| 243 | Int_t n = fGhness->GetNbinsX();
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| 244 |
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| 245 | fGraph->Set(n);
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| 246 | fQfac->Set(n);
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| 247 |
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| 248 | const Stat_t sumg = fGhness->Integral();
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| 249 | const Stat_t sump = fPhness->Integral();
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| 250 |
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| 251 | *fLog << inf << "MHHadronness::Finalize - Sum Hadronness: gammas=" << sumg << " hadrons=" << sump << endl;
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| 252 |
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| 253 | if (sumg==0 || sump==0)
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| 254 | *fLog << warn << "MHHadronness::Finalize: Cannot calculate hadronness." << endl;
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| 255 |
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| 256 |
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| 257 | // Normalize photon distribution
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| 258 | if (sumg>0)
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| 259 | fGhness->Scale(1./sumg);
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| 260 |
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| 261 | // Normalize hadron distribution
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| 262 | if (sump>0)
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| 263 | fGhness->Scale(1./sump);
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| 264 |
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| 265 | // Calculate acceptances
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| 266 | Float_t max=0;
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| 267 |
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| 268 |
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| 269 | for (Int_t i=1; i<=n; i++)
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| 270 | {
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| 271 | const Stat_t ip = sump!=0 ? fPhness->Integral(1, i) : 0;
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| 272 | const Stat_t ig = sumg!=0 ? fGhness->Integral(1, i) : 0;
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| 273 |
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| 274 | fIntPhness->SetBinContent(i, ip);
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| 275 | fIntGhness->SetBinContent(i, ig);
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| 276 |
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| 277 | fGraph->SetPoint(i, ip, ig);
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| 278 |
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| 279 | if (ip<=0)
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| 280 | continue;
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| 281 |
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| 282 | const Double_t val = ig/sqrt(ip);
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| 283 | fQfac->SetPoint(i, ig, val);
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| 284 |
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| 285 | if (val>max)
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| 286 | max = val;
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| 287 | }
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| 288 |
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| 289 | fQfac->SetMaximum(max*1.05);
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| 290 |
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| 291 | return kTRUE;
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| 292 | }
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| 293 |
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| 294 | // --------------------------------------------------------------------------
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| 295 | //
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| 296 | // Search the corresponding points for the given hadron acceptance (acchad)
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| 297 | // and interpolate the tow points (linear)
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| 298 | //
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| 299 | Double_t MHHadronness::GetGammaAcceptance(Double_t acchad) const
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| 300 | {
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| 301 | const Int_t n = fGraph->GetN();
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| 302 | const Double_t *x = fGraph->GetX();
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| 303 | const Double_t *y = fGraph->GetY();
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| 304 |
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| 305 | Int_t i = 0;
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| 306 | while (i<n && x[i]<acchad)
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| 307 | i++;
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| 308 |
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| 309 | if (i==0 || i==n)
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| 310 | return 0;
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| 311 |
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| 312 | if (i==n-1)
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| 313 | i--;
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| 314 |
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| 315 | const Double_t x1 = x[i-1];
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| 316 | const Double_t y1 = y[i-1];
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| 317 |
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| 318 | const Double_t x2 = x[i];
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| 319 | const Double_t y2 = y[i];
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| 320 |
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| 321 | return (y2-y1)/(x2-x1) * (acchad-x2) + y2;
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| 322 | }
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| 323 |
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| 324 | // --------------------------------------------------------------------------
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| 325 | //
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| 326 | // Search the corresponding points for the given gamma acceptance (accgam)
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| 327 | // and interpolate the tow points (linear)
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| 328 | //
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| 329 | Double_t MHHadronness::GetHadronAcceptance(Double_t accgam) const
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| 330 | {
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| 331 | const Int_t n = fGraph->GetN();
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| 332 | const Double_t *x = fGraph->GetX();
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| 333 | const Double_t *y = fGraph->GetY();
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| 334 |
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| 335 | Int_t i = 0;
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| 336 | while (i<n && y[i]<accgam)
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| 337 | i++;
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| 338 |
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| 339 | if (i==0 || i==n)
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| 340 | return 0;
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| 341 |
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| 342 | if (i==n-1)
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| 343 | i--;
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| 344 |
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| 345 | const Double_t x1 = y[i-1];
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| 346 | const Double_t y1 = x[i-1];
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| 347 |
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| 348 | const Double_t x2 = y[i];
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| 349 | const Double_t y2 = x[i];
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| 350 |
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| 351 | return (y2-y1)/(x2-x1) * (accgam-x2) + y2;
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| 352 | }
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| 353 |
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| 354 | // --------------------------------------------------------------------------
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| 355 | //
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| 356 | // Print the corresponding Gammas Acceptance for a hadron acceptance of
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| 357 | // 10%, 20%, 30%, 40% and 50%. Also the minimum distance to the optimum
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| 358 | // acceptance and the corresponding acceptances and hadroness value is
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| 359 | // printed, together with the maximum Q-factor.
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| 360 | //
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| 361 | void MHHadronness::Print(Option_t *) const
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| 362 | {
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| 363 | *fLog << all;
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| 364 | *fLog << "Hadronness histograms:" << endl;
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| 365 | *fLog << "---------------------" << endl;
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| 366 |
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| 367 | if (fGraph->GetN()==0)
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| 368 | {
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| 369 | *fLog << " <No Entries>" << endl;
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| 370 | return;
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| 371 | }
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| 372 |
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| 373 | *fLog << "Used " << fGhness->GetEntries() << " Gammas and " << fPhness->GetEntries() << " Hadrons." << endl;
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| 374 | *fLog << "acc(hadron) acc(gamma) acc(g)/acc(h)" << endl <<endl;
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| 375 |
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| 376 | *fLog << " 0.005 " << Form("%6.3f", GetGammaAcceptance(0.005)) << " " << Form("%6.3f", GetGammaAcceptance(0.005)/0.005) << endl;
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| 377 | *fLog << " 0.02 " << Form("%6.3f", GetGammaAcceptance(0.02)) << " " << Form("%6.3f", GetGammaAcceptance(0.02)/0.02) << endl;
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| 378 | *fLog << " 0.05 " << Form("%6.3f", GetGammaAcceptance(0.05)) << " " << Form("%6.3f", GetGammaAcceptance(0.05)/0.05) << endl;
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| 379 | *fLog << " 0.1 " << Form("%6.3f", GetGammaAcceptance(0.1 )) << " " << Form("%6.3f", GetGammaAcceptance(0.1)/0.1) << endl;
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| 380 | *fLog << " 0.2 " << Form("%6.3f", GetGammaAcceptance(0.2 )) << " " << Form("%6.3f", GetGammaAcceptance(0.2)/0.2) << endl;
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| 381 | *fLog << " 0.3 " << Form("%6.3f", GetGammaAcceptance(0.3 )) << " " << Form("%6.3f", GetGammaAcceptance(0.3)/0.3) << endl;
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| 382 | *fLog << Form("%6.3f", GetHadronAcceptance(0.1)) << " 0.1 " << endl;
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| 383 | *fLog << Form("%6.3f", GetHadronAcceptance(0.2)) << " 0.2 " << endl;
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| 384 | *fLog << Form("%6.3f", GetHadronAcceptance(0.3)) << " 0.3 " << endl;
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| 385 | *fLog << Form("%6.3f", GetHadronAcceptance(0.4)) << " 0.4 " << endl;
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| 386 | *fLog << Form("%6.3f", GetHadronAcceptance(0.5)) << " 0.5 " << endl;
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| 387 | *fLog << Form("%6.3f", GetHadronAcceptance(0.6)) << " 0.6 " << endl;
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| 388 | *fLog << Form("%6.3f", GetHadronAcceptance(0.7)) << " 0.7 " << endl;
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| 389 | *fLog << Form("%6.3f", GetHadronAcceptance(0.8)) << " 0.8 " << endl;
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| 390 | *fLog << endl;
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| 391 |
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| 392 | *fLog << "Q-Factor @ Acc Gammas=0.5: Q(0.5)=" << Form("%.1f", GetQ05()) << endl;
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| 393 | *fLog << " Acc Hadrons = " << Form("%5.1f", GetHadronAcceptance(0.5)*100) << "%" << endl;
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| 394 | *fLog << endl;
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| 395 | }
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| 396 |
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| 397 | // --------------------------------------------------------------------------
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| 398 | //
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| 399 | // Draw clone of all histograms. (For the Meaning see class description)
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| 400 | //
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| 401 | TObject *MHHadronness::DrawClone(Option_t *opt) const
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| 402 | {
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| 403 | if (fGraph->GetN()==0)
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| 404 | return NULL;
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| 405 |
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| 406 | TCanvas &c = *MakeDefCanvas("Hadronness", fTitle);
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| 407 | c.Divide(2, 2);
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| 408 |
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| 409 | gROOT->SetSelectedPad(NULL);
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| 410 |
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| 411 | c.cd(1);
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| 412 | //gStyle->SetOptStat(10);
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| 413 | Getghness()->DrawCopy();
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| 414 | Getphness()->SetLineColor(kRed);
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| 415 | Getphness()->DrawCopy("same");
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| 416 |
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| 417 | c.cd(2);
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| 418 | //gStyle->SetOptStat(0);
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| 419 | Getighness()->DrawCopy();
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| 420 | Getiphness()->SetLineColor(kRed);
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| 421 | Getiphness()->DrawCopy("same");
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| 422 |
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| 423 | c.cd(3);
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| 424 | TGraph &g2 = (TGraph&)*fQfac->DrawClone("A*");
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| 425 | g2.SetBit(kCanDelete);
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| 426 | gPad->Modified();
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| 427 | gPad->Update();
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| 428 | if (g2.GetHistogram())
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| 429 | {
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| 430 | g2.GetXaxis()->SetRangeUser(0, 1);
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| 431 | g2.GetXaxis()->SetTitle("Acceptance Gammas");
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| 432 | g2.GetYaxis()->SetTitle("Quality");
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| 433 | g2.SetMarkerStyle(kFullDotSmall);
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| 434 | g2.Draw("P");
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| 435 |
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| 436 | gPad->Modified();
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| 437 | gPad->Update();
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| 438 | }
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| 439 |
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| 440 | c.cd(4);
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| 441 | gPad->Modified();
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| 442 | gPad->Update();
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| 443 | TGraph &g = (TGraph&)*fGraph->DrawClone("AC");
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| 444 | g.SetBit(kCanDelete);
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| 445 | gPad->Modified();
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| 446 | gPad->Update();
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| 447 | if (g.GetHistogram())
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|---|
| 448 | {
|
|---|
| 449 | g.GetXaxis()->SetRangeUser(0, 1);
|
|---|
| 450 | g.GetXaxis()->SetTitle("Acceptance Hadrons");
|
|---|
| 451 | g.GetYaxis()->SetTitle("Acceptance Gammas");
|
|---|
| 452 | g.SetMarkerStyle(kFullDotSmall);
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|---|
| 453 | g.Draw("P");
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|---|
| 454 |
|
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| 455 | gPad->Modified();
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|---|
| 456 | gPad->Update();
|
|---|
| 457 | }
|
|---|
| 458 | /*
|
|---|
| 459 | const Int_t h = fMinDist->GetMaximumBin();
|
|---|
| 460 | TMarker *m = new TMarker(fIntPhness->GetBinContent(h),
|
|---|
| 461 | fIntGhness->GetBinContent(h), kStar);
|
|---|
| 462 | m->SetMarkerColor(kBlue);
|
|---|
| 463 | m->SetBit(kCanDelete);
|
|---|
| 464 | m->Draw();
|
|---|
| 465 | */
|
|---|
| 466 |
|
|---|
| 467 | gStyle->SetOptStat(111100);
|
|---|
| 468 |
|
|---|
| 469 | return &c;
|
|---|
| 470 | }
|
|---|
| 471 |
|
|---|
| 472 | // --------------------------------------------------------------------------
|
|---|
| 473 | //
|
|---|
| 474 | // Draw all histograms. (For the Meaning see class description)
|
|---|
| 475 | //
|
|---|
| 476 | void MHHadronness::Draw(Option_t *)
|
|---|
| 477 | {
|
|---|
| 478 | if (fGraph->GetN()==0)
|
|---|
| 479 | return;
|
|---|
| 480 |
|
|---|
| 481 | if (!gPad)
|
|---|
| 482 | MakeDefCanvas("Hadronness", fTitle);
|
|---|
| 483 |
|
|---|
| 484 | gPad->Divide(2, 2);
|
|---|
| 485 |
|
|---|
| 486 | gPad->cd(1);
|
|---|
| 487 | //gStyle->SetOptStat(10);
|
|---|
| 488 | Getghness()->Draw();
|
|---|
| 489 | Getphness()->SetLineColor(kRed);
|
|---|
| 490 | Getphness()->Draw("same");
|
|---|
| 491 |
|
|---|
| 492 | gPad->cd(2);
|
|---|
| 493 | //gStyle->SetOptStat(0);
|
|---|
| 494 | Getighness()->Draw();
|
|---|
| 495 | Getiphness()->SetLineColor(kRed);
|
|---|
| 496 | Getiphness()->Draw("same");
|
|---|
| 497 |
|
|---|
| 498 | gPad->cd(3);
|
|---|
| 499 | fQfac->Draw("A*");
|
|---|
| 500 | gPad->Modified();
|
|---|
| 501 | gPad->Update();
|
|---|
| 502 | if (fQfac->GetHistogram())
|
|---|
| 503 | {
|
|---|
| 504 | fQfac->GetXaxis()->SetRangeUser(0, 1);
|
|---|
| 505 | fQfac->GetXaxis()->SetTitle("Acceptance Gammas");
|
|---|
| 506 | fQfac->GetYaxis()->SetTitle("Quality");
|
|---|
| 507 | fQfac->SetMarkerStyle(kFullDotSmall);
|
|---|
| 508 | fQfac->Draw("P");
|
|---|
| 509 |
|
|---|
| 510 | gPad->Modified();
|
|---|
| 511 | gPad->Update();
|
|---|
| 512 | }
|
|---|
| 513 | gPad->cd(4);
|
|---|
| 514 | gPad->Modified();
|
|---|
| 515 | gPad->Update();
|
|---|
| 516 | fGraph->Draw("AC");
|
|---|
| 517 | gPad->Modified();
|
|---|
| 518 | gPad->Update();
|
|---|
| 519 | if (fGraph->GetHistogram())
|
|---|
| 520 | {
|
|---|
| 521 | fGraph->GetXaxis()->SetRangeUser(0, 1);
|
|---|
| 522 | fGraph->GetXaxis()->SetTitle("Acceptance Hadrons");
|
|---|
| 523 | fGraph->GetYaxis()->SetTitle("Acceptance Gammas");
|
|---|
| 524 | fGraph->SetMarkerStyle(kFullDotSmall);
|
|---|
| 525 | fGraph->Draw("P");
|
|---|
| 526 | gPad->Modified();
|
|---|
| 527 | gPad->Update();
|
|---|
| 528 | }
|
|---|
| 529 | }
|
|---|
