| 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, 11/2003 <mailto:tbretz@astro.uni-wuerzburg.de>
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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 | // MEventRate
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| 28 | //
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| 29 | // Storage Container for the event rate.
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| 30 | //
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| 31 | // rate = Number of events / time in which the events were recorded
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| 32 | // r = N / t
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| 33 | // s = t / N = 1 / r mean time interval between consecutive events
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| 34 | //
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| 35 | // for an exponential distribution of the time differences d between
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| 36 | // consecutive events:
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| 37 | //
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| 38 | // s = <d>
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| 39 | // sigma(d) = <d> = s
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| 40 | // delta(s) = sigma(d) /sqrt(N) = s / sqrt(N)
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| 41 | // delta(s) / s = 1 / sqrt(N)
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| 42 | //
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| 43 | // delta(r) / r = delta(s) / s = 1 / sqrt(N)
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| 44 | //
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| 45 | /////////////////////////////////////////////////////////////////////////////
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| 46 | #include "MEventRate.h"
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| 47 |
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| 48 | #include <TMath.h>
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| 49 |
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| 50 | #include "MLog.h"
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| 51 | #include "MLogManip.h"
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| 52 |
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| 53 | ClassImp(MEventRate);
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| 54 |
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| 55 | using namespace std;
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| 56 |
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| 57 | // --------------------------------------------------------------------------
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| 58 | //
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| 59 | // Default constructor.
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| 60 | //
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| 61 | MEventRate::MEventRate(const char *name, const char *title) : fRate(-1)
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| 62 | {
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| 63 | fName = name ? name : "MEventRate";
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| 64 | fTitle = title ? title : "Storage container for the event rate [Hz]";
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| 65 | }
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| 66 |
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| 67 | Double_t MEventRate::GetError() const
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| 68 | {
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| 69 | return TMath::Sqrt(1./fNumEvents);
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| 70 | }
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