/usr/include/CLHEP/Random/RandSkewNormal.h is in libclhep-dev 2.1.4.1+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// -*- C++ -*-
//
// -----------------------------------------------------------------------
// HEP Random
// --- RandSkewNormal ---
// class header file
// -----------------------------------------------------------------------
// RandSkewNormal ---
// returns a skew-normal distribution with shape parameter k
// To get a distribution with scale parameter b and location m:
// r = m + b * RandSkewNormal.fire(k);
// http://azzalini.stat.unipd.it/SN/
// algorithm from K. McFarlane, June 2010.
// =======================================================================
// M Fischler and L Garren - Created: 26 May 2011
// =======================================================================
#ifndef RandSkewNormal_h
#define RandSkewNormal_h 1
#include "CLHEP/Random/defs.h"
#include "CLHEP/Random/Random.h"
#include "CLHEP/Utility/memory.h"
namespace CLHEP {
/**
* @author <mf@fnal.gov>
* @ingroup random
*/
class RandSkewNormal : public HepRandom {
public:
inline RandSkewNormal ( HepRandomEngine& anEngine, double shape=0. );
inline RandSkewNormal ( HepRandomEngine* anEngine, double shape=0. );
// These constructors should be used to instantiate a RandSkewNormal
// distribution object defining a local engine for it.
// The static generator will be skipped using the non-static methods
// defined below.
// If the engine is passed by pointer the corresponding engine object
// will be deleted by the RandSkewNormal destructor.
// If the engine is passed by reference the corresponding engine object
// will not be deleted by the RandSkewNormal destructor.
virtual ~RandSkewNormal();
// Destructor
// Static methods to shoot random values using the static generator
static double shoot();
static double shoot( double shape );
static void shootArray ( const int size, double* vect,
double shape=0. );
// Static methods to shoot random values using a given engine
// by-passing the static generator.
static double shoot( HepRandomEngine* anEngine );
static double shoot( HepRandomEngine* anEngine, double shape );
static void shootArray ( HepRandomEngine* anEngine, const int size,
double* vect, double shape=0. );
// Methods using the localEngine to shoot random values, by-passing
// the static generator.
double fire();
double fire( double shape );
void fireArray ( const int size, double* vect );
void fireArray ( const int size, double* vect, double shape );
double operator()();
double operator()( double shape );
// Save and restore to/from streams
std::ostream & put ( std::ostream & os ) const;
std::istream & get ( std::istream & is );
std::string name() const;
HepRandomEngine & engine();
static std::string distributionName() {return "RandSkewNormal";}
// Provides the name of this distribution class
protected:
static double gaussianSkewNormal ( HepRandomEngine *e, double k);
double getShapeParameter() { return shapeParameter; }
inline HepRandomEngine* getLocalEngine();
private:
shared_ptr<HepRandomEngine> localEngine;
double shapeParameter;
};
} // namespace CLHEP
#ifdef ENABLE_BACKWARDS_COMPATIBILITY
// backwards compatibility will be enabled ONLY in CLHEP 1.9
using namespace CLHEP;
#endif
#include "CLHEP/Random/RandSkewNormal.icc"
#endif
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