DerivativeTest.cpp File Reference

Test file for the class NumericalDerivative. More...

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

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Namespaces
	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 35 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 );
  }
}