Cbc  2.8.12
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CbcBranchDynamicDecision Class Reference

Branching decision dynamic class. More...

#include <CbcBranchDynamic.hpp>

+ Inheritance diagram for CbcBranchDynamicDecision:
+ Collaboration diagram for CbcBranchDynamicDecision:

Public Member Functions

 CbcBranchDynamicDecision ()
 
 CbcBranchDynamicDecision (const CbcBranchDynamicDecision &)
 
virtual ~CbcBranchDynamicDecision ()
 
virtual CbcBranchDecisionclone () const
 Clone. More...
 
virtual void initialize (CbcModel *model)
 Initialize, e.g. before the start of branch selection at a node. More...
 
virtual int betterBranch (CbcBranchingObject *thisOne, CbcBranchingObject *bestSoFar, double changeUp, int numInfUp, double changeDn, int numInfDn)
 Compare two branching objects. More...
 
virtual void setBestCriterion (double value)
 Sets or gets best criterion so far. More...
 
virtual double getBestCriterion () const
 
virtual int whichMethod ()
 Says whether this method can handle both methods - 1 better, 2 best, 3 both. More...
 
virtual void saveBranchingObject (OsiBranchingObject *object)
 Saves a clone of current branching object. More...
 
virtual void updateInformation (OsiSolverInterface *solver, const CbcNode *node)
 Pass in information on branch just done. More...
 
- Public Member Functions inherited from CbcBranchDecision
 CbcBranchDecision ()
 Default Constructor. More...
 
 CbcBranchDecision (const CbcBranchDecision &)
 
virtual ~CbcBranchDecision ()
 Destructor. More...
 
virtual int bestBranch (CbcBranchingObject **objects, int numberObjects, int numberUnsatisfied, double *changeUp, int *numberInfeasibilitiesUp, double *changeDown, int *numberInfeasibilitiesDown, double objectiveValue)
 Compare N branching objects. More...
 
virtual void generateCpp (FILE *)
 Create C++ lines to get to current state. More...
 
CbcModelcbcModel () const
 Model. More...
 
OsiChooseVariable * chooseMethod () const
 
void setChooseMethod (const OsiChooseVariable &method)
 Set (clone) chooseMethod. More...
 

Additional Inherited Members

- Protected Attributes inherited from CbcBranchDecision
CbcBranchingObjectobject_
 
CbcModelmodel_
 Pointer to model. More...
 
OsiChooseVariable * chooseMethod_
 

Detailed Description

Branching decision dynamic class.

This class implements a simple algorithm (betterBranch()) for choosing a branching variable when dynamic pseudo costs.

Definition at line 19 of file CbcBranchDynamic.hpp.

Constructor & Destructor Documentation

CbcBranchDynamicDecision::CbcBranchDynamicDecision ( )
CbcBranchDynamicDecision::CbcBranchDynamicDecision ( const CbcBranchDynamicDecision )
virtual CbcBranchDynamicDecision::~CbcBranchDynamicDecision ( )
virtual

Member Function Documentation

virtual CbcBranchDecision* CbcBranchDynamicDecision::clone ( ) const
virtual

Clone.

Implements CbcBranchDecision.

virtual void CbcBranchDynamicDecision::initialize ( CbcModel model)
virtual

Initialize, e.g. before the start of branch selection at a node.

Implements CbcBranchDecision.

virtual int CbcBranchDynamicDecision::betterBranch ( CbcBranchingObject thisOne,
CbcBranchingObject bestSoFar,
double  changeUp,
int  numInfUp,
double  changeDn,
int  numInfDn 
)
virtual

Compare two branching objects.

Return nonzero if thisOne is better than bestSoFar.

The routine compares branches using the values supplied in numInfUp and numInfDn until a solution is found by search, after which it uses the values supplied in changeUp and changeDn. The best branching object seen so far and the associated parameter values are remembered in the CbcBranchDynamicDecision object. The nonzero return value is +1 if the up branch is preferred, -1 if the down branch is preferred.

As the names imply, the assumption is that the values supplied for numInfUp and numInfDn will be the number of infeasibilities reported by the branching object, and changeUp and changeDn will be the estimated change in objective. Other measures can be used if desired.

Because an CbcBranchDynamicDecision object remembers the current best branching candidate (#bestObject_) as well as the values used in the comparison, the parameter bestSoFar is redundant, hence unused.

Implements CbcBranchDecision.

virtual void CbcBranchDynamicDecision::setBestCriterion ( double  value)
virtual

Sets or gets best criterion so far.

Reimplemented from CbcBranchDecision.

virtual double CbcBranchDynamicDecision::getBestCriterion ( ) const
virtual

Reimplemented from CbcBranchDecision.

virtual int CbcBranchDynamicDecision::whichMethod ( )
inlinevirtual

Says whether this method can handle both methods - 1 better, 2 best, 3 both.

Reimplemented from CbcBranchDecision.

Definition at line 63 of file CbcBranchDynamic.hpp.

virtual void CbcBranchDynamicDecision::saveBranchingObject ( OsiBranchingObject *  object)
virtual

Saves a clone of current branching object.

Can be used to update information on object causing branch - after branch

Reimplemented from CbcBranchDecision.

virtual void CbcBranchDynamicDecision::updateInformation ( OsiSolverInterface *  solver,
const CbcNode node 
)
virtual

Pass in information on branch just done.

assumes object can get information from solver

Reimplemented from CbcBranchDecision.


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