Minotaur::Cut Class Reference

Store function, bounds and other information about a cut. More...

#include <Cut.h>

Inheritance diagram for Minotaur::Cut:

Collaboration diagram for Minotaur::Cut:

Public Member Functions
	Cut ()
	Empty Constructor.
	Cut (size_t n, FunctionPtr f, double lb, double ub, bool never_delete, bool never_disable)
	Default constructor.
	Cut (ProblemPtr p, FunctionPtr f, double lb, double ub, bool never_delete, bool never_disable)
	~Cut ()
	Destroy.
void	applyToProblem (ProblemPtr p)
	Add a cut to the problem.
double	eval (const double *x, int *err)
	Evaluate the activity of this cut at a given point.
void	evalScore (const double *x, double *vio, double *score)
	Evaluate score of this cut at a given point.
ConstraintPtr	getConstraint ()
	Get Constraint pointer if this cut is in the problem. Null otherwise.
FunctionPtr	getFunction ()
	Get Function Pointer of the cut.
CutInfo *	getInfo ()
	Get pointer to the cut info data structure.
double	getLb ()
	Get lb of the inequality.
std::string	getName ()
	Get name of the cut.
double	getUb ()
	Get ub of the inequality.
void	setCons (ConstraintPtr c)
	Constraint associated with the cut.
void	setName_ (std::string name)
	Set name of the cut.
void	write (std::ostream &out) const
	Display.
void	writeStats (std::ostream &out) const
	Display statistics and information.

Protected Member Functions
void	initInfo_ (bool never_delete, bool never_disable)
	Initialize the values in info_ data structure.
void	evalFixedScore_ ()
	Assign a fixed score to the cut.

Protected Attributes
ConstraintPtr	cons_
	Pointer to the constraint. Null if it is disabled.
FunctionPtr	f_
	Pointer to the function of a cut.
CutInfo	info_
	Information about the cut.
double	lb_
	Lower bound.
LoggerPtr	logger_
	Logger for display.
size_t	n_
	Number of variables in the problem. Used to calculate hash.
double	ub_
	Upper bound.
double	fixedScore_
	Fixed score of each cut.
std::string	name_
	Name of the cut (could be NULL).

Detailed Description

Store function, bounds and other information about a cut.

The Cut class is meant to store a cut generated by different cut generators and handlers. This is a base class and special classes of cuts can be derived from it. Also stores auxiliary information and statistics about this cut.

Constructor & Destructor Documentation

Cut()

Cut::Cut	(	size_t	n,
		FunctionPtr	f,
		double	lb,
		double	ub,
		bool	never_delete,
		bool	never_disable
	)

Default constructor.

Parameters

[in]	n	Number of variables in the problem to which this cut is applied. Used for evaluating a hash value.
[in]	f	Function in the cut .
[in]	lb	Lower bound in the above cut.
[in]	ub	Upper bound in the above cut.
[in]	never_delete	If true, this cut is never deleted from the pool.
[in]	never_disable	If true, this cut is never removed from the problem.

Member Function Documentation

applyToProblem()

void Cut::applyToProblem

(

ProblemPtr

p

)

Add a cut to the problem.

Parameters

[in]

p

The given problem.

eval()

double Cut::eval	(	const double *	x,
		int *	err
	)

Evaluate the activity of this cut at a given point.

Parameters

[in]	x	The given point.
[out]	err	Zero if no error ocurred in evaluation.

Returns

The activity at the given point.

evalScore()

void Cut::evalScore	(	const double *	x,
		double *	vio,
		double *	score
	)

Evaluate score of this cut at a given point.

Parameters

[in]	x	The given point.
[out]	vio	Violation of this cut.
[out]	score	Score if this cut.

initInfo_()

void Cut::initInfo_ ( bool  never_delete, bool  never_disable  )

protected

Initialize the values in info_ data structure.

Parameters

[in]	never_delete	True if cut should never leave the pool.
[in]	never_disable	True if cut should never be removed from the problem.

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

• /home/amahajan/tmp/minotaur-test/src/base/Cut.h
• /home/amahajan/tmp/minotaur-test/src/base/Cut.cpp