CLHEP 2.0.4.7 Reference Documentation
CLHEP Home Page CLHEP Documentation CLHEP Bug Reports |
00001 // -*- C++ -*- 00002 // $Id: Erf.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $ 00003 //---------------------Erf--------------------------------------------------// 00004 // // 00005 // Class Erf // 00006 // Joe Boudreau, Petar Maksimovic, November 1999 // 00007 // // 00008 //--------------------------------------------------------------------------// 00009 #ifndef Erf_h 00010 #define Erf_h 1 00011 #include "CLHEP/GenericFunctions/AbsFunction.hh" 00012 #include "CLHEP/GenericFunctions/Parameter.hh" 00013 #include "CLHEP/GenericFunctions/IncompleteGamma.hh" 00014 namespace Genfun { 00015 00020 class Erf : public AbsFunction { 00021 00022 FUNCTION_OBJECT_DEF(Erf) 00023 00024 public: 00025 00026 // Constructor 00027 Erf(); 00028 00029 // Copy constructor 00030 Erf(const Erf &right); 00031 00032 // Destructor 00033 virtual ~Erf(); 00034 00035 // Retreive function value 00036 virtual double operator ()(double argument) const; 00037 virtual double operator ()(const Argument & a) const {return operator() (a[0]);} 00038 00039 // Derivative. 00040 Derivative partial (unsigned int) const; 00041 00042 // Does this function have an analytic derivative? 00043 virtual bool hasAnalyticDerivative() const {return true;} 00044 00045 private: 00046 00047 // It is illegal to assign an adjustable constant 00048 const Erf & operator=(const Erf &right); 00049 00050 IncompleteGamma _incompleteGamma; 00051 00052 }; 00053 } // namespace Genfun 00054 #endif