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AbcPrimalColumnDantzig Class Reference

Primal Column Pivot Dantzig Algorithm Class. More...

#include <AbcPrimalColumnDantzig.hpp>

+ Inheritance diagram for AbcPrimalColumnDantzig:
+ Collaboration diagram for AbcPrimalColumnDantzig:

Public Member Functions

Algorithmic methods
virtual int pivotColumn (CoinPartitionedVector *updates, CoinPartitionedVector *spareRow2, CoinPartitionedVector *spareColumn1)
 Returns pivot column, -1 if none. More...
 
virtual void saveWeights (AbcSimplex *model, int)
 Just sets model. More...
 
Constructors and destructors
 AbcPrimalColumnDantzig ()
 Default Constructor. More...
 
 AbcPrimalColumnDantzig (const AbcPrimalColumnDantzig &)
 Copy constructor. More...
 
AbcPrimalColumnDantzigoperator= (const AbcPrimalColumnDantzig &rhs)
 Assignment operator. More...
 
virtual ~AbcPrimalColumnDantzig ()
 Destructor. More...
 
virtual AbcPrimalColumnPivotclone (bool copyData=true) const
 Clone. More...
 
- Public Member Functions inherited from AbcPrimalColumnPivot
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...
 
 AbcPrimalColumnPivot ()
 Default Constructor. More...
 
 AbcPrimalColumnPivot (const AbcPrimalColumnPivot &)
 Copy constructor. More...
 
AbcPrimalColumnPivotoperator= (const AbcPrimalColumnPivot &rhs)
 Assignment operator. More...
 
virtual ~AbcPrimalColumnPivot ()
 Destructor. More...
 
AbcSimplexmodel ()
 Returns model. More...
 
void setModel (AbcSimplex *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 AbcPrimalColumnPivot
AbcSimplexmodel_
 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 AbcPrimalColumnDantzig.hpp.

Constructor & Destructor Documentation

AbcPrimalColumnDantzig::AbcPrimalColumnDantzig ( )

Default Constructor.

AbcPrimalColumnDantzig::AbcPrimalColumnDantzig ( const AbcPrimalColumnDantzig )

Copy constructor.

virtual AbcPrimalColumnDantzig::~AbcPrimalColumnDantzig ( )
virtual

Destructor.

Member Function Documentation

virtual int AbcPrimalColumnDantzig::pivotColumn ( CoinPartitionedVector updates,
CoinPartitionedVector spareRow2,
CoinPartitionedVector spareColumn1 
)
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 AbcPrimalColumnPivot.

virtual void AbcPrimalColumnDantzig::saveWeights ( AbcSimplex model,
int   
)
inlinevirtual

Just sets model.

Implements AbcPrimalColumnPivot.

Definition at line 38 of file AbcPrimalColumnDantzig.hpp.

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

Assignment operator.

virtual AbcPrimalColumnPivot* AbcPrimalColumnDantzig::clone ( bool  copyData = true) const
virtual

Clone.

Implements AbcPrimalColumnPivot.


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