Gabriele Cosmo
107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4Sigma.hh,v 1.6 2002/04/10 13:13:07 dressel Exp $
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// GEANT4 tag $Name: geant4-04-01 $
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//
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// ----------------------------------------------------------------------
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// Class G4Sigma
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//
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// Class description:
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//
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// A class for simple Gaussian statistics taking into account
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// weights.
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// Author: Michael Dressel (Michael.Dressel@cern.ch)
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// ----------------------------------------------------------------------
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#ifndef G4Sigma_hh
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#define G4Sigma_hh G4Sigma_hh
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#include "g4std/iostream"
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#include "globals.hh"
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class G4Sigma
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{
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public: // with description
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G4Sigma();
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// call Init()
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~G4Sigma();
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// simple deonstruction
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void Init();
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// initialisation
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G4int Xin(G4double x, G4double w = 1.);
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// enter a value [with a weight]
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G4int GetEntries() const;
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// get the number of entries
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G4double GetMean() const;
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// get the weighted mean value: Sum(w*x)/Sum(w)
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G4double GetSigma() const;
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// get the weighted sigma: sqrt(Sum(w*x*x)/Sum(w)-mean^2)
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G4double GetXsum() const;
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// get sum over x: Sum(x)
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G4double GetXXsum() const;
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// get sum over squared x: Sum(x*x)
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G4double GetSumOfWeights() const;
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// get sum over weights: Sum(w)
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G4double GetWeightedXsum() const;
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// get weighted sum over x*w: Sum(w*x)
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G4double GetWeightedXXsum() const;
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// get weighted sum over squarted x: Sum(W*x*x)
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private:
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G4int GetCalc() const;
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G4int Calculate() const;
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void Error(const G4String &m);
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private:
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G4int fEntries;
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mutable G4double fMean;
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mutable G4double fSigma;
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G4double fXsum;
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G4double fXXsum;
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G4double fWsum;
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G4double fWXsum;
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G4double fWXXsum;
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mutable G4int fcalc;
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};
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G4std::ostream& operator<<(G4std::ostream &out, const G4Sigma &s);
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#endif
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