#include <CglLandP.hpp>

Inheritance diagram for CglLandP:

Collaboration diagram for CglLandP:

Classes
struct	CachedData
	Some informations that will be changed by the pivots and that we want to keep. More...

class	NoBasisError

class	Parameters
	Class storing parameters. More...

class	SimplexInterfaceError

Public Types
enum	SelectionRules { mostNegativeRc, bestPivot, initialReducedCosts }

enum	ExtraCutsMode { none, AtOptimalBasis, WhenEnteringBasis, AllViolatedMigs }

enum	SeparationSpaces { Fractional =0, Fractional_rc, Full }
	Space where cuts are optimized. More...

enum	Normalization { Unweighted = 0, WeightRHS, WeightLHS, WeightBoth }
	Normalization. More...

enum	LHSnorm { L1 = 0, L2, SupportSize, Infinity, Average, Uniform }

enum	RhsWeightType { Fixed = 0, Dynamic }
	RHS weight in normalization. More...

Public Member Functions
	CglLandP (const CglLandP::Parameters &params=CglLandP::Parameters(), const LAP::Validator &validator=LAP::Validator())
	Constructor for the class. More...

	~CglLandP ()
	Destructor. More...

	CglLandP (const CglLandP &source)
	Copy constructor. More...

CglLandP &	operator= (const CglLandP &rhs)
	Assignment operator. More...

CglCutGenerator *	clone () const
	Clone function. More...

virtual bool	needsOptimalBasis () const
	Return true if needs optimal basis to do cuts. More...

LAP::Validator &	validator ()

void	setLogLevel (int level)
	set level of log for cut generation procedure : More...

Parameters &	parameter ()

Generate Cuts
virtual void	generateCuts (const OsiSolverInterface &si, OsiCuts &cs, const CglTreeInfo info=CglTreeInfo())
	Generate cuts for the model data contained in si. More...

Public Member Functions inherited from CglCutGenerator
	CglCutGenerator ()
	Default constructor. More...

	CglCutGenerator (const CglCutGenerator &)
	Copy constructor. More...

CglCutGenerator &	operator= (const CglCutGenerator &rhs)
	Assignment operator. More...

virtual	~CglCutGenerator ()
	Destructor. More...

virtual std::string	generateCpp (FILE *)
	Create C++ lines to set the generator in the current state. More...

virtual void	refreshSolver (OsiSolverInterface *)
	This can be used to refresh any information. More...

int	getAggressiveness () const
	Get Aggressiveness - 0 = neutral, 100 is normal root node. More...

void	setAggressiveness (int value)
	Set Aggressiveness - 0 = neutral, 100 is normal root node. More...

void	setGlobalCuts (bool trueOrFalse)
	Set whether can do global cuts. More...

bool	canDoGlobalCuts () const
	Say whether can do global cuts. More...

virtual bool	mayGenerateRowCutsInTree () const
	Returns true if may generate Row cuts in tree (rather than root node). More...

virtual int	maximumLengthOfCutInTree () const
	Return maximum length of cut in tree. More...

Private Member Functions
void	scanExtraCuts (OsiCuts &cs, const double *colsol) const

int	getSortedFractionals (CoinPackedVector &xFrac, const CachedData &data, const CglLandP::Parameters &params) const
	Retrieve sorted integer variables which are fractional in the solution. More...

void	getSortedFractionalIndices (std::vector< int > &indices, const CachedData &data, const CglLandP::Parameters &params) const
	Retrieve sorted integer variables which are fractional in the solution. More...

Private Attributes
Parameters	params_

CachedData	cached_
	Cached informations about problem. More...

CoinMessageHandler *	handler_
	message handler More...

CoinMessages	messages_
	messages More...

LAP::Validator	validator_
	cut validator More...

int	numrows_
	number of rows in the original problems. More...

int	numcols_
	number of columns in the original problems. More...

double *	originalColLower_
	Original lower bounds for the problem (for lifting cuts). More...

double *	originalColUpper_
	Original upper bounds for the problem (for lifting cuts). More...

bool	canLift_
	Flag to say if cuts can be lifted. More...

OsiCuts	extraCuts_
	Store some extra cut which could be cheaply generated but do not cut current incumbent. More...

Friends
class	LAP::CglLandPSimplex

class	CftCglp

void	CglLandPUnitTest (OsiSolverInterface *si, const std::string &mpsDir)

Additional Inherited Members
Public Attributes inherited from CglCutGenerator
int	aggressive_
	Aggressiveness - 0 = neutral, 100 is normal root node. More...

bool	canDoGlobalCuts_
	True if can do global cuts i.e. no general integers. More...

Detailed Description

Definition at line 49 of file CglLandP.hpp.

Member Enumeration Documentation

enum CglLandP::SelectionRules

Enumerator
mostNegativeRc	select most negative reduced cost
bestPivot	select best possible pivot.
initialReducedCosts	Select only those rows which had initialy a 0 reduced cost.

Definition at line 58 of file CglLandP.hpp.

enum CglLandP::ExtraCutsMode

Enumerator
none	Generate no extra cuts.
AtOptimalBasis	Generate cuts from the optimal basis.
WhenEnteringBasis	Generate cuts as soon as a structural enters the basis.
AllViolatedMigs	Generate all violated Mixed integer Gomory cuts in the course of the optimization.

Definition at line 65 of file CglLandP.hpp.

enum CglLandP::SeparationSpaces

Space where cuts are optimized.

Enumerator
Fractional
Fractional_rc	Use fractional space only for computing reduced costs.
Full	Work in full space.

Definition at line 74 of file CglLandP.hpp.

enum CglLandP::Normalization

Normalization.

Enumerator
Unweighted
WeightRHS
WeightLHS
WeightBoth

Definition at line 82 of file CglLandP.hpp.

enum CglLandP::LHSnorm

Enumerator
L1
L2
SupportSize
Infinity
Average
Uniform

Definition at line 90 of file CglLandP.hpp.

enum CglLandP::RhsWeightType

RHS weight in normalization.

Enumerator
Fixed
Dynamic	2 * current number of constraints.

Definition at line 100 of file CglLandP.hpp.

Constructor & Destructor Documentation

CglLandP::CglLandP	(	const CglLandP::Parameters &	params = `CglLandP::Parameters()`,
		const LAP::Validator &	validator = `LAP::Validator()`
	)

Constructor for the class.

CglLandP::~CglLandP ( )

Destructor.

CglLandP::CglLandP ( const CglLandP & source )

Copy constructor.

Member Function Documentation

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

Assignment operator.

CglCutGenerator* CglLandP::clone ( ) const

virtual

Clone function.

Implements CglCutGenerator.

virtual void CglLandP::generateCuts	(	const OsiSolverInterface &	si,
		OsiCuts &	cs,
		const CglTreeInfo	info = `CglTreeInfo()`
	)

virtual

Generate cuts for the model data contained in si.

The generated cuts are inserted into and returned in the collection of cuts cs.

Implements CglCutGenerator.

virtual bool CglLandP::needsOptimalBasis ( ) const

inlinevirtual

Return true if needs optimal basis to do cuts.

Reimplemented from CglCutGenerator.

Definition at line 197 of file CglLandP.hpp.

LAP::Validator& CglLandP::validator ( )

inline

Definition at line 202 of file CglLandP.hpp.

void CglLandP::setLogLevel ( int level )

inline

set level of log for cut generation procedure :

for none
for log at begin and end of procedure + at some time interval
for log at every cut generated

Definition at line 213 of file CglLandP.hpp.

Parameters& CglLandP::parameter ( )

inline

Definition at line 229 of file CglLandP.hpp.

void CglLandP::scanExtraCuts	(	OsiCuts &	cs,
		const double *	colsol
	)		const

private

int CglLandP::getSortedFractionals	(	CoinPackedVector &	xFrac,
		const CachedData &	data,
		const CglLandP::Parameters &	params
	)		const

private

Retrieve sorted integer variables which are fractional in the solution.

Return the number of variables.

void CglLandP::getSortedFractionalIndices	(	std::vector< int > &	indices,
		const CachedData &	data,
		const CglLandP::Parameters &	params
	)		const

private

Retrieve sorted integer variables which are fractional in the solution.

Return the number of variables.

Friends And Related Function Documentation

friend class LAP::CglLandPSimplex

friend

Definition at line 53 of file CglLandP.hpp.

friend class CftCglp

friend

Definition at line 54 of file CglLandP.hpp.

void CglLandPUnitTest	(	OsiSolverInterface *	si,
		const std::string &	mpsDir
	)

friend

Member Data Documentation

Parameters CglLandP::params_

private

Definition at line 238 of file CglLandP.hpp.

CachedData CglLandP::cached_

private

Cached informations about problem.

Definition at line 283 of file CglLandP.hpp.

CoinMessageHandler* CglLandP::handler_

private

message handler

Definition at line 285 of file CglLandP.hpp.

CoinMessages CglLandP::messages_

private

messages

Definition at line 287 of file CglLandP.hpp.

LAP::Validator CglLandP::validator_

private

cut validator

Definition at line 289 of file CglLandP.hpp.

int CglLandP::numrows_

private

number of rows in the original problems.

Definition at line 291 of file CglLandP.hpp.

int CglLandP::numcols_

private

number of columns in the original problems.

Definition at line 293 of file CglLandP.hpp.

double* CglLandP::originalColLower_

private

Original lower bounds for the problem (for lifting cuts).

Definition at line 295 of file CglLandP.hpp.

double* CglLandP::originalColUpper_

private

Original upper bounds for the problem (for lifting cuts).

Definition at line 297 of file CglLandP.hpp.

bool CglLandP::canLift_

private

Flag to say if cuts can be lifted.

Definition at line 299 of file CglLandP.hpp.

OsiCuts CglLandP::extraCuts_

private

Store some extra cut which could be cheaply generated but do not cut current incumbent.

Definition at line 301 of file CglLandP.hpp.

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

/tmp/Cbc-2.10.5/Cgl/src/CglLandP/CglLandP.hpp

Classes

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Friends

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation