Import Geant4 4.1.0 source tree

2016-06-08 16:39:52 +02:00
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+//
+// ********************************************************************
+// * DISCLAIMER                                                       *
+// *                                                                  *
+// * The following disclaimer summarizes all the specific disclaimers *
+// * of contributors to this software. The specific disclaimers,which *
+// * govern, are listed with their locations in:                      *
+// *   http://cern.ch/geant4/license                                  *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.                                                             *
+// *                                                                  *
+// * This  code  implementation is the  intellectual property  of the *
+// * GEANT4 collaboration.                                            *
+// * By copying,  distributing  or modifying the Program (or any work *
+// * based  on  the Program)  you indicate  your  acceptance of  this *
+// * statement, and all its terms.                                    *
+// ********************************************************************
+//
+//
+// $Id: G4Sigma.hh,v 1.6 2002/04/10 13:13:07 dressel Exp $
+// GEANT4 tag $Name: geant4-04-01 $
+//
+// ----------------------------------------------------------------------
+// Class G4Sigma
+//
+// Class description:
+//
+// A class for simple Gaussian statistics taking into account 
+// weights.
+
+// Author: Michael Dressel (Michael.Dressel@cern.ch)
+// ----------------------------------------------------------------------
+#ifndef G4Sigma_hh
+#define G4Sigma_hh G4Sigma_hh
+
+#include "g4std/iostream"
+#include "globals.hh"
+
+class G4Sigma
+{ 
+  
+ public:  // with description
+
+  G4Sigma();
+    // call Init()
+
+  ~G4Sigma();
+    // simple deonstruction
+
+  void Init();
+    // initialisation
+
+  G4int Xin(G4double x, G4double w = 1.);
+   // enter a value [with a weight] 
+
+  G4int GetEntries() const;
+    // get the number of entries
+
+  G4double GetMean() const;
+    // get the weighted mean value: Sum(w*x)/Sum(w)
+
+  G4double GetSigma() const;
+    // get the weighted sigma: sqrt(Sum(w*x*x)/Sum(w)-mean^2)
+
+  G4double GetXsum() const;
+    // get sum over x: Sum(x) 
+
+  G4double GetXXsum() const;
+    // get sum over squared x: Sum(x*x)
+
+  G4double GetSumOfWeights() const;
+    // get sum over weights: Sum(w) 
+
+  G4double GetWeightedXsum() const;
+    // get weighted sum over x*w: Sum(w*x)
+
+  G4double GetWeightedXXsum() const;
+    // get weighted sum over squarted x: Sum(W*x*x)
+
+ private:
+
+  G4int GetCalc() const;
+  G4int Calculate() const;
+  void Error(const G4String &m);
+
+ private:
+
+  G4int fEntries;
+  mutable G4double fMean;
+  mutable G4double fSigma;
+  G4double fXsum;
+  G4double fXXsum;
+  G4double fWsum;
+  G4double fWXsum;
+  G4double fWXXsum;
+  mutable G4int fcalc;
+
+};
+
+G4std::ostream& operator<<(G4std::ostream &out, const G4Sigma &s);
+
+#endif