Optimist::TestSet::Schaffer2< Real > Class Template Reference

Class container for the Schaffer2 function. More...

#include <Schaffer2.hh>

Inherits Optimist::CostFunction< Real, 2, Schaffer2< Real > >.

Public Types
using	Vector = typename CostFunction<Real, 2, Schaffer2<Real>>::Vector
using	RowVector = typename CostFunction<Real, 2, Schaffer2<Real>>::RowVector
using	Matrix = typename CostFunction<Real, 2, Schaffer2<Real>>::Matrix
Public Types inherited from Optimist::CostFunction< Real, 2, Schaffer2< Real > >
using	Vector
using	RowVector
using	Matrix
Public Types inherited from Optimist::Function< Real, N, 1, Schaffer2< Real > >
using	InputType
using	OutputType
using	FirstDerivativeType
using	SecondDerivativeType

Public Member Functions
	Schaffer2 ()
std::string	name_impl () const
void	evaluate_impl (const Vector &x, Real &out) const
void	first_derivative_impl (const Vector &x, RowVector &out) const
void	second_derivative_impl (const Vector &x, Matrix &out) const
Public Member Functions inherited from Optimist::CostFunction< Real, 2, Schaffer2< Real > >
	CostFunction ()
std::string	name () const
void	evaluate (const Vector &x, Vector &out) const
void	gradient (const Vector &x, RowVector &out) const
void	hessian (const Vector &x, Matrix &out) const
Public Member Functions inherited from Optimist::Function< Real, N, 1, Schaffer2< Real > >
	Function ()
std::string	name () const
void	evaluate (const InputType &x, OutputType &out) const
void	first_derivative (const InputType &x, FirstDerivativeType &out) const
void	second_derivative (const InputType &x, SecondDerivativeType &out) const
constexpr Integer	input_dimension () const
constexpr Integer	output_dimension () const
const std::vector< InputType > &	solutions () const
const std::vector< InputType > &	guesses () const
const InputType &	solution (const Integer i) const
const InputType &	guess (const Integer i) const
bool	is_solution (const InputType &x, const Real tol=EPSILON_LOW) const

Additional Inherited Members
Public Attributes inherited from Optimist::CostFunction< Real, 2, Schaffer2< Real > >
friend	Function< Real, N, 1, CostFunction< Real, N, DerivedFunction > >
Protected Attributes inherited from Optimist::Function< Real, N, 1, Schaffer2< Real > >
std::vector< InputType >	m_solutions
std::vector< InputType >	m_guesses

Detailed Description

template<typename Real>
class Optimist::TestSet::Schaffer2< Real >

Class container for the Schaffer2 function, which is defined as:

\[f(\mathbf{x}) = 0.5 + \displaystyle\frac{\sin^{2}(x_1^2 - x_2^2) - 0.5}{(1 + 0.001(x_1^2 + x_2^2))^2} \text{.} \]

The function has global minima at \(\mathbf{x} = (0, 0)\), with \(f(\mathbf{x}) = 0\). The initial guesses are generated on the square \(x_i \in \left[-100, 100\right]\).

Template Parameters

Real	Scalar number type.

Member Typedef Documentation

Matrix

template<typename Real>

using Optimist::TestSet::Schaffer2< Real >::Matrix = typename CostFunction<Real, 2, Schaffer2<Real>>::Matrix

Basic constants.

RowVector

template<typename Real>

using Optimist::TestSet::Schaffer2< Real >::RowVector = typename CostFunction<Real, 2, Schaffer2<Real>>::RowVector

Vector

template<typename Real>

using Optimist::TestSet::Schaffer2< Real >::Vector = typename CostFunction<Real, 2, Schaffer2<Real>>::Vector

Constructor & Destructor Documentation

Schaffer2()

template<typename Real>

Optimist::TestSet::Schaffer2< Real >::Schaffer2 ( )

inline

Class constructor for the Schaffer2 function.

Member Function Documentation

evaluate_impl()

template<typename Real>

void Optimist::TestSet::Schaffer2< Real >::evaluate_impl ( const Vector & x, Real & out ) const

inline

Compute the function value at the input point.

Parameters

[in]	x	Input point.
[out]	out	The function value.

first_derivative_impl()

template<typename Real>

void Optimist::TestSet::Schaffer2< Real >::first_derivative_impl ( const Vector & x, RowVector & out ) const

inline

Compute the first derivative value at the input point.

Parameters

[in]	x	Input point.
[out]	out	The first derivative value.

name_impl()

template<typename Real>

std::string Optimist::TestSet::Schaffer2< Real >::name_impl ( ) const

inline

Get the function name.

Returns

The function name.

second_derivative_impl()

template<typename Real>

void Optimist::TestSet::Schaffer2< Real >::second_derivative_impl ( const Vector & x, Matrix & out ) const

inline

Compute the second derivative value at the input point.

Parameters

[in]	x	Input point.
[out]	out	The second derivative value.

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The documentation for this class was generated from the following file:

• include/Optimist/TestSet/CostFunction/Schaffer2.hh