| 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): Wolfgang Wittek, 11/2003 <mailto:wittek@mppmu.mpg.de>
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| 19 | !
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| 20 | ! Copyright: MAGIC Software Development, 2000-2003
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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 | // MFRandomSplit
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| 28 | //
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| 29 | // A filter which gives fResult = kTRUE with the probability fProb
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| 30 | //
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| 31 | /////////////////////////////////////////////////////////////////////////////
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| 32 | #include "MFRandomSplit.h"
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| 33 |
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| 34 | #include <fstream>
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| 35 | #include <TRandom.h>
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| 36 |
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| 37 | #include "MParList.h"
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| 38 |
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| 39 | #include "MLog.h"
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| 40 | #include "MLogManip.h"
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| 41 |
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| 42 | ClassImp(MFRandomSplit);
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| 43 |
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| 44 | using namespace std;
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| 45 |
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| 46 | // --------------------------------------------------------------------------
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| 47 | //
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| 48 | // Constructor
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| 49 | //
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| 50 | MFRandomSplit::MFRandomSplit(Double_t f, const char *name, const char *title)
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| 51 | : fProb(f)
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| 52 | {
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| 53 | fName = name ? name : "MFRandomSplit";
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| 54 | fTitle = title ? title : "Filter for random splitting";
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| 55 |
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| 56 | if (fProb < 0)
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| 57 | {
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| 58 | *fLog << warn << "WARNING - MFRandomSplit::MFRandomSplit: Probability less than 0... set to 0." << endl;
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| 59 | fProb = 0;
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| 60 | }
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| 61 |
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| 62 | if (fProb > 1)
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| 63 | {
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| 64 | *fLog << warn << "WARNING - MFRandomSplit::MFRandomSplit: Probability greater than 1... set to 1." << endl;
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| 65 | fProb = 1;
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| 66 | }
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| 67 | }
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| 68 |
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| 69 | // --------------------------------------------------------------------------
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| 70 | //
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| 71 | // PreProcess. Set fNumSelectedEvts=0
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| 72 | //
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| 73 | Int_t MFRandomSplit::PreProcess(MParList *pList)
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| 74 | {
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| 75 | fNumSelectedEvts = 0;
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| 76 | return kTRUE;
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| 77 | }
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| 78 |
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| 79 | // --------------------------------------------------------------------------
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| 80 | //
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| 81 | // Select events randomly according to the probability fProb. Count all
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| 82 | // selected events
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| 83 | //
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| 84 | Int_t MFRandomSplit::Process()
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| 85 | {
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| 86 | fResult = gRandom->Uniform() < fProb;
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| 87 |
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| 88 | if (fResult)
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| 89 | fNumSelectedEvts++;
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| 90 |
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| 91 | return kTRUE;
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| 92 | }
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| 93 |
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| 94 |
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| 95 | // --------------------------------------------------------------------------
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| 96 | //
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| 97 | // PostProcess. Prints execution statistics
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| 98 | //
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| 99 | Int_t MFRandomSplit::PostProcess()
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| 100 | {
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| 101 | if (GetNumExecutions()==0)
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| 102 | return kTRUE;
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| 103 |
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| 104 | *fLog << inf << endl;
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| 105 | *fLog << GetDescriptor() << " execution statistics:" << endl;
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| 106 | *fLog << dec << setfill(' ');
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| 107 | *fLog << " " << setw(7) << fNumSelectedEvts << " (";
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| 108 | *fLog << setw(3) << (int)(100.*fNumSelectedEvts/GetNumExecutions());
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| 109 | *fLog << "%) selected - out of " << GetNumExecutions() << endl;
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| 110 | *fLog << endl;
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| 111 |
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| 112 | return kTRUE;
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| 113 | }
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