Primal Column Pivot Dantzig Algorithm Class. More...

#include <ClpPrimalColumnDantzig.hpp>

Inheritance diagram for ClpPrimalColumnDantzig:

Collaboration diagram for ClpPrimalColumnDantzig:

Public Member Functions
Algorithmic methods
virtual int	pivotColumn (CoinIndexedVector updates, CoinIndexedVector spareRow1, CoinIndexedVector spareRow2, CoinIndexedVector spareColumn1, CoinIndexedVector *spareColumn2)
	Returns pivot column, -1 if none. More...

virtual void	saveWeights (ClpSimplex *model, int)
	Just sets model. More...

Constructors and destructors
	ClpPrimalColumnDantzig ()
	Default Constructor. More...

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

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

virtual	~ClpPrimalColumnDantzig ()
	Destructor. More...

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

Public Member Functions inherited from ClpPrimalColumnPivot
virtual void	updateWeights (CoinIndexedVector *input)
	Updates weights - part 1 (may be empty) More...

virtual int	pivotRow (double &way)
	Signals pivot row choice: -2 (default) - use normal pivot row choice -1 to numberRows-1 - use this (will be checked) way should be -1 to go to lower bound, +1 to upper bound. More...

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

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

virtual void	setLooksOptimal (bool flag)
	Sets optimality flag (for advanced use) More...

	ClpPrimalColumnPivot ()
	Default Constructor. More...

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

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

virtual	~ClpPrimalColumnPivot ()
	Destructor. More...

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

void	setModel (ClpSimplex *newmodel)
	Sets model. More...

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

virtual int	numberSprintColumns (int &numberIterations) const
	Returns number of extra columns for sprint algorithm - 0 means off. More...

virtual void	switchOffSprint ()
	Switch off sprint idea. More...

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

Additional Inherited Members
Protected Attributes inherited from ClpPrimalColumnPivot
ClpSimplex *	model_
	Pointer to model. More...

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

bool	looksOptimal_
	Says if looks optimal (normally computed) More...

Detailed Description

Primal Column Pivot Dantzig Algorithm Class.

This is simplest choice - choose largest infeasibility

Definition at line 19 of file ClpPrimalColumnDantzig.hpp.

Constructor & Destructor Documentation

◆ ClpPrimalColumnDantzig() [1/2]

ClpPrimalColumnDantzig::ClpPrimalColumnDantzig ( )

Default Constructor.

◆ ClpPrimalColumnDantzig() [2/2]

ClpPrimalColumnDantzig::ClpPrimalColumnDantzig ( const ClpPrimalColumnDantzig & )

Copy constructor.

◆ ~ClpPrimalColumnDantzig()

virtual ClpPrimalColumnDantzig::~ClpPrimalColumnDantzig ( )

virtual

Destructor.

Member Function Documentation

◆ pivotColumn()

virtual int ClpPrimalColumnDantzig::pivotColumn	(	CoinIndexedVector *	updates,
		CoinIndexedVector *	spareRow1,
		CoinIndexedVector *	spareRow2,
		CoinIndexedVector *	spareColumn1,
		CoinIndexedVector *	spareColumn2
	)

virtual

Returns pivot column, -1 if none.

Lumbers over all columns - slow The Packed CoinIndexedVector updates has cost updates - for normal LP that is just +-weight where a feasibility changed. It also has reduced cost from last iteration in pivot row Can just do full price if you really want to be slow

Implements ClpPrimalColumnPivot.

Reimplemented in ClpPEPrimalColumnDantzig.