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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"`
Include dependency graph for DerivativeTest.cpp:

Go to the source code of this file.

## 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.

36 {
37
38 std::cout << " Test for numerical differentiation of Genfun::Sin(x) " << std::endl;
39
40 const GaudiMath::Function& mysin = Genfun::Sin();
41 const GaudiMath::Derivative& prim1 = GaudiMath::Derivative( mysin, 0 );
42 const GaudiMath::Function& prim = prim1;
43
44 for ( double x = -90 * Gaudi::Units::degree; x <= 180 * Gaudi::Units::degree; x += 10 * Gaudi::Units::degree ) {
45 double value = prim( x );
46 double error = prim1.error();
47 printf( " x=%8.3f deg; Sin'=%+.19f; ActualErr=%+.19f; EstimatedErr=%+.19f\n", x / Gaudi::Units::degree, value,
48 value - cos( x ), error );
49 }
50 }
Gaudi::Units::degree
constexpr double degree
Definition: SystemOfUnits.h:109
Genfun::GaudiMathImplementation::NumericalDerivative::error
double error() const
the absolute error estimate for the last call
Definition: NumericalDerivative.h:124
std::endl
T endl(T...args)
GaudiMath::Function
Genfun::AbsFunction Function
Definition: GaudiMath.h:24
GaudiMath::Derivative
Genfun::GaudiMathImplementation::NumericalDerivative Derivative
Definition: GaudiMath.h:27
std::cos
T cos(T...args)
Genfun::GaudiMathImplementation::NumericalDerivative
Numerical derivative (using GSL adaptive numerical differentiation)
Definition: NumericalDerivative.h:42
std::printf
T printf(T...args)
std::cout