DerivativeTest.cpp File Reference

Test file for the class NumericalDerivative. More...

#include <math.h>
#include <stdio.h>
#include <iostream>
#include "GaudiMath/GaudiMath.h"
#include "GaudiKernel/SystemOfUnits.h"
#include "CLHEP/GenericFunctions/Sin.hh"

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Namespaces
namespace	CLHEP

Functions
int	main ()

Detailed Description

Test file for the class NumericalDerivative.

Date

2003-08-31

Author

Vanya BELYAEV Ivan..nosp@m.Bely.nosp@m.aev@i.nosp@m.tep..nosp@m.ru

Definition in file DerivativeTest.cpp.

Function Documentation

int main

(

)

Definition at line 34 of file DerivativeTest.cpp.

{

  std::cout <<
    " Test for numerical differentiation of Genfun::Sin(x) " << std::endl ;

  const GaudiMath::Function&   mysin     = Genfun::Sin();
  const GaudiMath::Derivative& prim1     = GaudiMath::Derivative( mysin , 0 );
  const GaudiMath::Function&   prim      = prim1 ;

  for( double x = -90 * Gaudi::Units::degree  ;
       x <= 180 * Gaudi::Units::degree  ;
       x += 10 * Gaudi::Units::degree ) {
    double value = prim(x) ;
    double error = prim1.error()  ;
    printf
      ( " x=%8.3f deg; Sin'=%+.19f; ActualErr=%+.19f; EstimatedErr=%+.19f\n",
    x / Gaudi::Units::degree      ,
    value           ,
    value  - cos(x) ,
    error           );
  }

  exit(0);

}