/usr/include/CLHEP/GenericFunctions/GammaDistribution.hh is in libclhep-dev 2.1.4.1-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | // -*- C++ -*-
// $Id:
//---------------------GammaDistribution------------------------------------//
// //
// Class Gamma, x^a * e(-x/b) / (b^(a+1) Gamma(Alpha+1)); //
// Joe Boudreau, Jan 2007 //
// //
//--------------------------------------------------------------------------//
#ifndef GammaDistribution_h
#define GammaDistribution_h 1
#include "CLHEP/GenericFunctions/AbsFunction.hh"
#include "CLHEP/GenericFunctions/Parameter.hh"
#include "CLHEP/GenericFunctions/LogGamma.hh"
#define _GAMMADISTRIBUTION_REVISED_ 1
namespace Genfun {
/**
* @author
* @ingroup genfun
*/
class GammaDistribution : public AbsFunction {
FUNCTION_OBJECT_DEF(GammaDistribution)
public:
// Constructor
GammaDistribution();
// Copy constructor
GammaDistribution(const GammaDistribution &right);
// Destructor
virtual ~GammaDistribution();
// Retreive function value
virtual double operator ()(double argument) const;
virtual double operator ()(const Argument & a) const {return operator() (a[0]);}
// Get the paramter alpha
Parameter & alpha();
// Get the paramter alpha
Parameter & beta();
private:
// It is illegal to assign an adjustable constant
const GammaDistribution & operator=(const GammaDistribution &right);
// Here are the two parameters alpha and beta:
Parameter _alpha;
Parameter _beta;
// This function has a LogGamma Function;
LogGamma _logGamma;
};
} // namespace Genfun
#endif
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