CbcHeuristicGreedyCover Class Reference

Greedy heuristic classes. More...

#include <CbcHeuristicGreedy.hpp>

Inheritance diagram for CbcHeuristicGreedyCover:

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Collaboration diagram for CbcHeuristicGreedyCover:

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List of all members.

Public Member Functions
	CbcHeuristicGreedyCover ()
	CbcHeuristicGreedyCover (CbcModel &model)
	CbcHeuristicGreedyCover (const CbcHeuristicGreedyCover &)
	~CbcHeuristicGreedyCover ()
virtual CbcHeuristic *	clone () const
	Clone.
CbcHeuristicGreedyCover &	operator= (const CbcHeuristicGreedyCover &rhs)
	Assignment operator.
virtual void	generateCpp (FILE *fp)
	Create C++ lines to get to current state.
virtual void	setModel (CbcModel *model)
	update model (This is needed if cliques update matrix etc)
virtual int	solution (double &objectiveValue, double *newSolution)
	returns 0 if no solution, 1 if valid solution.
virtual void	validate ()
	Validate model i.e. sets when_ to 0 if necessary (may be NULL).
virtual void	resetModel (CbcModel *model)
	Resets stuff if model changes.
int	algorithm () const
void	setAlgorithm (int value)
int	numberTimes () const
void	setNumberTimes (int value)
Protected Member Functions
void	gutsOfConstructor (CbcModel *model)
	Guts of constructor from a CbcModel.
Protected Attributes
CoinPackedMatrix	matrix_
int	originalNumberRows_
int	algorithm_
int	numberTimes_
	Do this many times.

Detailed Description

Greedy heuristic classes.

Definition at line 10 of file CbcHeuristicGreedy.hpp.

Constructor & Destructor Documentation

CbcHeuristicGreedyCover::CbcHeuristicGreedyCover ( )

CbcHeuristicGreedyCover::CbcHeuristicGreedyCover ( CbcModel & model )

CbcHeuristicGreedyCover::CbcHeuristicGreedyCover ( const CbcHeuristicGreedyCover & )

CbcHeuristicGreedyCover::~CbcHeuristicGreedyCover ( )

Member Function Documentation

virtual CbcHeuristic* CbcHeuristicGreedyCover::clone ( ) const [virtual]

Clone.

Implements CbcHeuristic.

CbcHeuristicGreedyCover& CbcHeuristicGreedyCover::operator= ( const CbcHeuristicGreedyCover & rhs )

Assignment operator.

Reimplemented from CbcHeuristic.

virtual void CbcHeuristicGreedyCover::generateCpp ( FILE * fp ) [virtual]

Create C++ lines to get to current state.

Reimplemented from CbcHeuristic.

virtual void CbcHeuristicGreedyCover::setModel ( CbcModel * model ) [virtual]

update model (This is needed if cliques update matrix etc)

Reimplemented from CbcHeuristic.

virtual int CbcHeuristicGreedyCover::solution	(	double &	objectiveValue,
		double *	newSolution
	)			`[virtual]`

returns 0 if no solution, 1 if valid solution.

Sets solution values if good, sets objective value (only if good) We leave all variables which are at one at this node of the tree to that value and will initially set all others to zero. We then sort all variables in order of their cost divided by the number of entries in rows which are not yet covered. We randomize that value a bit so that ties will be broken in different ways on different runs of the heuristic. We then choose the best one and set it to one and repeat the exercise.

Implements CbcHeuristic.

virtual void CbcHeuristicGreedyCover::validate ( ) [virtual]

Validate model i.e. sets when_ to 0 if necessary (may be NULL).

Reimplemented from CbcHeuristic.

virtual void CbcHeuristicGreedyCover::resetModel ( CbcModel * model ) [virtual]

Resets stuff if model changes.

Implements CbcHeuristic.

int CbcHeuristicGreedyCover::algorithm ( ) const [inline]

Definition at line 60 of file CbcHeuristicGreedy.hpp.

void CbcHeuristicGreedyCover::setAlgorithm ( int value ) [inline]

Definition at line 62 of file CbcHeuristicGreedy.hpp.

int CbcHeuristicGreedyCover::numberTimes ( ) const [inline]