| 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): Marcos Lopez, 10/2003 <mailto:marcos@gae.ucm.es>
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| 19 | !
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| 20 | ! Copyright: MAGIC Software Development, 2000-2004
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| 21 | !
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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 | // weights.C
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| 28 | // =========
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| 29 | //
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| 30 | // This macro shows how to use the class MMcWeightEnergySpecCalc
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| 31 | // to convert the energy spectrum of the MC showers generated with Corsika,
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| 32 | // to a different one.
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| 33 | //
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| 34 | //////////////////////////////////////////////////////////////////////////////
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| 35 |
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| 36 | Double_t myfunction(Double_t *x, Double_t *par)
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| 37 | {
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| 38 | Double_t xx = x[0];
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| 39 |
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| 40 | return pow(xx,-2)*exp(-xx/20);
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| 41 | }
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| 42 |
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| 43 | void weights(TString filename="/up1/data/Magic-MC/CameraAll/Gammas/zbin0/Gamma_zbin0_0_7_1000to1009_w0-4:4:2.root")
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| 44 | {
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| 45 |
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| 46 | //
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| 47 | // PartList
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| 48 | //
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| 49 | MParList parlist;
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| 50 | MTaskList tasklist;
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| 51 |
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| 52 | MHMcEnergyImpact h1("h1");
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| 53 | MHMcEnergyImpact h2("h2");
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| 54 | parlist.AddToList(&h1);
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| 55 | parlist.AddToList(&h2);
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| 56 |
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| 57 | MBinning binsenergy("BinningEnergy");
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| 58 | binsenergy.SetEdgesLog(100, 1, 1e5);
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| 59 | parlist.AddToList(&binsenergy);
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| 60 |
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| 61 | MBinning binsimpact("BinningImpact");
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| 62 | binsimpact.SetEdges(100, 0, 450);
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| 63 | parlist.AddToList(&binsimpact);
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| 64 |
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| 65 | parlist.AddToList(&tasklist);
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| 66 |
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| 67 |
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| 68 | //
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| 69 | // TaskList
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| 70 | //
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| 71 | MReadMarsFile reader("Events", filename);
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| 72 | reader.EnableBranch("fEnergy");
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| 73 | reader.EnableBranch("fImpact");
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| 74 |
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| 75 |
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| 76 | // -------------------------------------------------------------
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| 77 | //
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| 78 | // Option 1. Just change the slope of the MC power law spectrum
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| 79 | //
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| 80 | //MMcWeightEnergySpecCalc wcalc(-2.0); //<-- Uncomment me
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| 81 |
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| 82 | //
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| 83 | // Option 2. A completely differente specturm pass as a TF1 function
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| 84 | // e.g. spectrum with exponential cutoff
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| 85 | //
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| 86 | //TF1 spec("spectrum","pow(x,[0])*exp(-x/[1])"); //<-- Uncomment me
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| 87 | //spec->SetParameter(0,-2.0); //<-- Uncomment me
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| 88 | //spec->SetParameter(1,50); //<-- Uncomment me
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| 89 | //MMcWeightEnergySpecCalc wcalc(spec); //<-- Uncomment me
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| 90 |
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| 91 | //
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| 92 | // Option 3. A completely differente specturm pass as a cahr*
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| 93 | //
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| 94 | //char* func = "pow(x,-2)"; //<-- Uncomment me
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| 95 | //MMcWeightEnergySpecCalc wcalc(func); //<-- Uncomment me
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| 96 |
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| 97 | //
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| 98 | // Option 4. A completely differente specturm pass as a c++ function
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| 99 | //
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| 100 | MMcWeightEnergySpecCalc wcalc((void*)myfunction); //<-- Uncomment me
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| 101 | //
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| 102 | //-------------------------------------------------------------
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| 103 |
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| 104 | MFillH hfill(&h1,"MMcEvt");
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| 105 | MFillH hfill2(&h2,"MMcEvt");
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| 106 | hfill2.SetWeight("MWeight");
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| 107 |
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| 108 | tasklist.AddToList(&reader);
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| 109 | tasklist.AddToList(&wcalc);
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| 110 | tasklist.AddToList(&hfill);
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| 111 | tasklist.AddToList(&hfill2);
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| 112 |
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| 113 | //
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| 114 | // EventLoop
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| 115 | //
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| 116 | MEvtLoop magic;
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| 117 | magic.SetParList(&parlist);
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| 118 |
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| 119 | if (!magic.Eventloop())
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| 120 | return;
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| 121 |
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| 122 | tasklist.PrintStatistics();
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| 123 | parlist.Print();
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| 124 |
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| 125 | //
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| 126 | // Draw the Results
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| 127 | //
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| 128 | TCanvas *c = new TCanvas();
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| 129 | c->SetLogy();
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| 130 | c->SetLogx();
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| 131 |
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| 132 | TH1D* hist1 = (h1->GetHist())->ProjectionX();
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| 133 | TH1D* hist2 = (h2->GetHist())->ProjectionX();
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| 134 | hist2->SetLineColor(2);
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| 135 |
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| 136 | hist1->DrawClone();
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| 137 | hist2->DrawClone("same");
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| 138 | }
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