Dual Row Pivot Steepest Edge Algorithm Class. More...

#include <ClpPEDualRowSteepest.hpp>

Inheritance diagram for ClpPEDualRowSteepest:

Collaboration diagram for ClpPEDualRowSteepest:

Public Member Functions
	ClpPEDualRowSteepest (double psi=0.5, int mode=3)
	Default Constructor mode: 0 is uninitialized, 1 full, 2 is partial uninitialized, 3 starts as 2 but may switch to 1. More...

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

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

virtual	~ClpPEDualRowSteepest ()
	Destructor. More...

virtual ClpDualRowPivot *	clone (bool copyData=true) const
	Clone. More...

Public Member Functions inherited from ClpDualRowSteepest
	ClpDualRowSteepest (int mode=3)
	Default Constructor 0 is uninitialized, 1 full, 2 is partial uninitialized, 3 starts as 2 but may switch to 1. More...

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

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

void	fill (const ClpDualRowSteepest &rhs)
	Fill most values. More...

virtual	~ClpDualRowSteepest ()
	Destructor. More...

int	mode () const
	Mode. More...

void	setMode (int mode)
	Set mode. More...

void	setPersistence (Persistence life)
	Set/ get persistence. More...

Persistence	persistence () const

virtual double	updateWeights (CoinIndexedVector input, CoinIndexedVector spare, CoinIndexedVector spare2, CoinIndexedVector updatedColumn)
	Updates weights and returns pivot alpha. More...

void	passInSavedWeights (const CoinIndexedVector *saved)
	Pass in saved weights. More...

CoinIndexedVector *	savedWeights ()
	Get saved weights. More...

virtual void	unrollWeights ()
	Gets rid of last update. More...

virtual void	clearArrays ()
	Gets rid of all arrays. More...

virtual bool	looksOptimal () const
	Returns true if would not find any row. More...

virtual void	maximumPivotsChanged ()
	Called when maximum pivots changes. More...

Public Member Functions inherited from ClpDualRowPivot
virtual void	checkAccuracy ()
	checks accuracy and may re-initialize (may be empty) More...

	ClpDualRowPivot ()
	Default Constructor. More...

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

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

virtual	~ClpDualRowPivot ()
	Destructor. More...

ClpSimplex *	model ()
	Returns model. More...

void	setModel (ClpSimplex *newmodel)
	Sets model (normally to NULL) More...

int	type ()
	Returns type (above 63 is extra information) More...

Algorithmic methods
ClpPESimplex *	modelPE_

double	psi_

int	iCurrent_

int	iInterval_

bool	updateCompatibles_

int	coDegenCompatibles_

int	coConsecutiveCompatibles_

virtual int	pivotRow ()
	Returns pivot row, -1 if none. More...

virtual void	saveWeights (ClpSimplex *model, int mode)
	Save weights - this may initialize weights as well This is as parent but may initialize ClpPESimplex. More...

virtual void	updatePrimalSolution (CoinIndexedVector *input, double theta, double &changeInObjective)
	Updates primal solution (and maybe list of candidates) Uses input vector which it deletes Computes change in objective function As ordinary steepest but checks for zero moves. More...

double	psi () const

Additional Inherited Members
Public Types inherited from ClpDualRowSteepest
enum	Persistence { normal = 0x00, keep = 0x01 }
	enums for persistence More...

Protected Attributes inherited from ClpDualRowSteepest
int	state_
	Status 0) Normal -1) Needs initialization 1) Weights are stored by sequence number. More...

int	mode_
	If 0 then we are using uninitialized weights, 1 then full, if 2 then uninitialized partial, 3 switchable. More...

Persistence	persistence_
	Life of weights. More...

double *	weights_
	weight array More...

CoinIndexedVector *	infeasible_
	square of infeasibility array (just for infeasible rows) More...

CoinIndexedVector *	alternateWeights_
	alternate weight array (so we can unroll) More...

CoinIndexedVector *	savedWeights_
	save weight array (so we can use checkpoint) More...

int *	dubiousWeights_
	Dubious weights. More...

Protected Attributes inherited from ClpDualRowPivot
ClpSimplex *	model_
	Pointer to model. More...

int	type_
	Type of row pivot algorithm. More...

Detailed Description

Dual Row Pivot Steepest Edge Algorithm Class.

See Forrest-Goldfarb paper for algorithm

Definition at line 27 of file ClpPEDualRowSteepest.hpp.

Constructor & Destructor Documentation

◆ ClpPEDualRowSteepest() [1/2]

ClpPEDualRowSteepest::ClpPEDualRowSteepest	(	double	psi = `0.5`,
		int	mode = `3`
	)

Default Constructor mode: 0 is uninitialized, 1 full, 2 is partial uninitialized, 3 starts as 2 but may switch to 1.

By partial is meant that the weights are updated as normal but only part of the infeasible basic variables are scanned. This can be faster on very easy problems.

◆ ClpPEDualRowSteepest() [2/2]

ClpPEDualRowSteepest::ClpPEDualRowSteepest ( const ClpPEDualRowSteepest & )

Copy constructor.

◆ ~ClpPEDualRowSteepest()

virtual ClpPEDualRowSteepest::~ClpPEDualRowSteepest ( )

virtual

Destructor.

Member Function Documentation

◆ operator=()

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

Assignment operator.

◆ clone()

virtual ClpDualRowPivot* ClpPEDualRowSteepest::clone ( bool copyData = true ) const

virtual

Clone.

Reimplemented from ClpDualRowSteepest.

◆ pivotRow()

virtual int ClpPEDualRowSteepest::pivotRow ( )

virtual

Returns pivot row, -1 if none.

Reimplemented from ClpDualRowSteepest.

◆ saveWeights()

virtual void ClpPEDualRowSteepest::saveWeights	(	ClpSimplex *	model,
		int	mode
	)

virtual

Save weights - this may initialize weights as well This is as parent but may initialize ClpPESimplex.

Reimplemented from ClpDualRowSteepest.

◆ updatePrimalSolution()

virtual void ClpPEDualRowSteepest::updatePrimalSolution	(	CoinIndexedVector *	input,
		double	theta,
		double &	changeInObjective
	)

virtual

Updates primal solution (and maybe list of candidates) Uses input vector which it deletes Computes change in objective function As ordinary steepest but checks for zero moves.

Reimplemented from ClpDualRowSteepest.

◆ psi()

double ClpPEDualRowSteepest::psi ( ) const

inline

Definition at line 73 of file ClpPEDualRowSteepest.hpp.

Member Data Documentation

◆ modelPE_

ClpPESimplex* ClpPEDualRowSteepest::modelPE_

private

Definition at line 82 of file ClpPEDualRowSteepest.hpp.

◆ psi_

double ClpPEDualRowSteepest::psi_

private

Definition at line 86 of file ClpPEDualRowSteepest.hpp.

◆ iCurrent_

int ClpPEDualRowSteepest::iCurrent_

private

Definition at line 89 of file ClpPEDualRowSteepest.hpp.

◆ iInterval_

int ClpPEDualRowSteepest::iInterval_

private

Definition at line 90 of file ClpPEDualRowSteepest.hpp.

◆ updateCompatibles_

bool ClpPEDualRowSteepest::updateCompatibles_

private

Definition at line 93 of file ClpPEDualRowSteepest.hpp.

◆ coDegenCompatibles_

int ClpPEDualRowSteepest::coDegenCompatibles_

private

Definition at line 94 of file ClpPEDualRowSteepest.hpp.

◆ coConsecutiveCompatibles_

int ClpPEDualRowSteepest::coConsecutiveCompatibles_

private

Definition at line 94 of file ClpPEDualRowSteepest.hpp.

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

/home/ted/tmp/tmp/Clp/Clp/src/ClpPEDualRowSteepest.hpp

Public Member Functions

Algorithmic methods

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ClpPEDualRowSteepest() [1/2]

◆ ClpPEDualRowSteepest() [2/2]

◆ ~ClpPEDualRowSteepest()

Member Function Documentation

◆ operator=()

◆ clone()

◆ pivotRow()

◆ saveWeights()

◆ updatePrimalSolution()

◆ psi()

Member Data Documentation

◆ modelPE_

◆ psi_

◆ iCurrent_

◆ iInterval_

◆ updateCompatibles_

◆ coDegenCompatibles_

◆ coConsecutiveCompatibles_