amplObj Class Reference

Class for an AMPL-objective-function. More...

#include <ampl.h>

Inheritance diagram for amplObj:

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Collaboration diagram for amplObj:

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List of all members.

Public Member Functions
	amplObj (int dim_=0, Pointer< SparsityInfo > sparsity_=NULL, Pointer< ostream > out_func_p_=out_out_p, Pointer< ostream > out_func_log_p_=out_log_p)
	(Standard-)Constructor with optional the dimension.
double	eval (const UserVector< double > &x) const
	Evaluates the objective for a UserVector<double>.
void	grad (dvector &g, const dvector &x) const
	Computes the gradient of the objective for a dvector.
void	grad (UserVector< double > &g, const UserVector< double > &x) const
	Computes the (sub)gradient for a UserVector<double>.
void	HessMult (dvector &y, const dvector &x, const dvector &z) const
	Computes the product of a Hessian and a dvector.
void	HessMult (UserVector< double > &y, const UserVector< double > &x, const UserVector< double > &z) const
	Evaluates the product of the Hessian and a UserVector<double>.
void	set_curvature (CurvatureType ct)
CurvatureType	get_curvature () const
void	print (ostream &out) const
	Prints some information about this function.
Private Attributes
Func::CurvatureType	curv_type

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Detailed Description

Class for an AMPL-objective-function.

This class is used to compute a nonlinear objective of a problem, which was described by an ampl-file.

Definition at line 66 of file ampl.h.

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Constructor & Destructor Documentation

amplObj::amplObj	(	int	dim_ = 0,
		Pointer< SparsityInfo >	sparsity_ = NULL,
		Pointer< ostream >	out_func_p_ = out_out_p,
		Pointer< ostream >	out_func_log_p_ = out_log_p
	)			[inline]

(Standard-)Constructor with optional the dimension.

Parameters:

	dim_	The dimension of the function.
	out_func_p_	An ostream to print function-related output to, default is out_out_p.
	out_func_log_p_	An ostream to print function-related logging-output to, default is out_func_p.

Definition at line 75 of file ampl.h.

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Member Function Documentation

double amplObj::eval

(

const UserVector< double > &

x

)

const [inline, virtual]

Evaluates the objective for a UserVector<double>.

Calls objval(...) from the AMPL/Solver Interface Library (ASL).

Parameters:

x

The UserVector<double> to evaluate.

Returns:

The value of the objective.

Implements Func.

Definition at line 85 of file ampl.h.

void amplObj::grad	(	dvector &	g,
		const dvector &	x
	)			const [inline]

Computes the gradient of the objective for a dvector.

Calls objgrd(...) from the AMPL/Solver Interface Library (ASL).

Parameters:

	g	The dvector to store the result in.
	x	The dvector to compute the gradient for.

Definition at line 103 of file ampl.h.

void amplObj::grad	(	UserVector< double > &	g,
		const UserVector< double > &	x
	)			const [inline, virtual]

Computes the (sub)gradient for a UserVector<double>.

Abstract.

Parameters:

	g	The UserVector<double> to store the result in.
	x	The UserVector<double> to compute the gradient for.

See also:

grad(const dvector&)

valgrad(double&, UserVector<double>&, const UserVector<double>&)

add_grad(UserVector<double>&, UserVector<double>&)

add_valgrad(double&, UserVector<double>&, UserVector<double>&)

Implements Func.

Definition at line 116 of file ampl.h.

void amplObj::HessMult	(	dvector &	y,
		const dvector &	x,
		const dvector &	z
	)			const [inline]

Computes the product of a Hessian and a dvector.

Parameters:

	y	The dvector to store the result in.
	x	The dvector to compute the Hessian for.
	z	The dvector to multiply with the Hessian.

Definition at line 139 of file ampl.h.

void amplObj::HessMult	(	UserVector< double > &	y,
		const UserVector< double > &	x,
		const UserVector< double > &	z
	)			const [inline, virtual]

Evaluates the product of the Hessian and a UserVector<double>.

Abstract.

Parameters:

	y	The UserVector<double> to store the result in: .
	x	The UserVector<double> to evaluate the Hessian for.
	z	The UserVector<double> to multiply with the Hessian.

See also:

HessMult(const UserVector<double>&, const UserVector<double>&)

Implements Func.

Definition at line 144 of file ampl.h.

void amplObj::set_curvature

(

CurvatureType

ct

)

[inline, virtual]

Implements Func.

Definition at line 154 of file ampl.h.

CurvatureType amplObj::get_curvature

(

)

const [inline, virtual]

Implements Func.

Definition at line 155 of file ampl.h.

void amplObj::print

(

ostream &

out

)

const [inline, virtual]

Prints some information about this function.

Prints the dimension.

Parameters:

out

The ostream to print to.

Reimplemented from Func.

Definition at line 161 of file ampl.h.

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Member Data Documentation

Func::CurvatureType amplObj::curv_type [private]

Definition at line 68 of file ampl.h.

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

• ampl.h