OsiChooseStrongSubset Class Reference

This class chooses a variable to branch on. More...

#include <CbcLinked.hpp>

Inheritance diagram for OsiChooseStrongSubset:

[legend]Collaboration diagram for OsiChooseStrongSubset:


Public Member Functions
	OsiChooseStrongSubset ()
	Default Constructor.
	OsiChooseStrongSubset (const OsiSolverInterface *solver)
	Constructor from solver (so we can set up arrays etc).
	OsiChooseStrongSubset (const OsiChooseStrongSubset &)
	Copy constructor.
OsiChooseStrongSubset &	operator= (const OsiChooseStrongSubset &rhs)
	Assignment operator.
virtual OsiChooseVariable *	clone () const
	Clone.
virtual	~OsiChooseStrongSubset ()
	Destructor.
virtual int	setupList (OsiBranchingInformation *info, bool initialize)
	Sets up strong list and clears all if initialize is true.
virtual int	chooseVariable (OsiSolverInterface solver, OsiBranchingInformation info, bool fixVariables)
	Choose a variable Returns - -1 Node is infeasible 0 Normal termination - we have a candidate 1 All looks satisfied - no candidate 2 We can change the bound on a variable - but we also have a strong branching candidate 3 We can change the bound on a variable - but we have a non-strong branching candidate 4 We can change the bound on a variable - no other candidates We can pick up branch from bestObjectIndex() and bestWhichWay() We can pick up a forced branch (can change bound) from firstForcedObjectIndex() and firstForcedWhichWay() If we have a solution then we can pick up from goodObjectiveValue() and goodSolution() If fixVariables is true then 2,3,4 are all really same as problem changed.
int	numberObjectsToUse () const
	Number of objects to use.
void	setNumberObjectsToUse (int value)
	Set number of objects to use.
Protected Attributes
int	numberObjectsToUse_
	Number of objects to be used (and set in solver).

Detailed Description

This class chooses a variable to branch on.

This is just as OsiChooseStrong but it fakes it so only first so many are looked at in this phase

Definition at line 1144 of file CbcLinked.hpp.

Constructor & Destructor Documentation

OsiChooseStrongSubset::OsiChooseStrongSubset ( )

Default Constructor.

OsiChooseStrongSubset::OsiChooseStrongSubset ( const OsiSolverInterface * solver )

Constructor from solver (so we can set up arrays etc).

OsiChooseStrongSubset::OsiChooseStrongSubset ( const OsiChooseStrongSubset & )

Copy constructor.

virtual OsiChooseStrongSubset::~OsiChooseStrongSubset ( ) [virtual]

Destructor.

Member Function Documentation

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

Assignment operator.

virtual OsiChooseVariable* OsiChooseStrongSubset::clone ( ) const [virtual]

Clone.

Reimplemented from OsiChooseStrong.

virtual int OsiChooseStrongSubset::setupList	(	OsiBranchingInformation *	info,
		bool	initialize
	)			`[virtual]`

Sets up strong list and clears all if initialize is true.

Returns number of infeasibilities. If returns -1 then has worked out node is infeasible!

Reimplemented from OsiChooseStrong.

virtual int OsiChooseStrongSubset::chooseVariable	(	OsiSolverInterface *	solver,
		OsiBranchingInformation *	info,
		bool	fixVariables
	)			`[virtual]`

Choose a variable Returns - -1 Node is infeasible 0 Normal termination - we have a candidate 1 All looks satisfied - no candidate 2 We can change the bound on a variable - but we also have a strong branching candidate 3 We can change the bound on a variable - but we have a non-strong branching candidate 4 We can change the bound on a variable - no other candidates We can pick up branch from bestObjectIndex() and bestWhichWay() We can pick up a forced branch (can change bound) from firstForcedObjectIndex() and firstForcedWhichWay() If we have a solution then we can pick up from goodObjectiveValue() and goodSolution() If fixVariables is true then 2,3,4 are all really same as problem changed.

Reimplemented from OsiChooseStrong.

int OsiChooseStrongSubset::numberObjectsToUse ( ) const [inline]

Number of objects to use.

Definition at line 1187 of file CbcLinked.hpp.

References numberObjectsToUse_.

void OsiChooseStrongSubset::setNumberObjectsToUse ( int value ) [inline]

Set number of objects to use.

Definition at line 1190 of file CbcLinked.hpp.

References numberObjectsToUse_.