CbcBranchToFixLots Class Reference

Define a branch class that branches so that one way variables are fixed while the other way cuts off that solution. More...

#include <CbcBranchCut.hpp>

Inheritance diagram for CbcBranchToFixLots:

[legend]Collaboration diagram for CbcBranchToFixLots:

[legend]List of all members.

Public Member Functions
	CbcBranchToFixLots ()
	CbcBranchToFixLots (CbcModel *model, double djTolerance, double fractionFixed, int depth, int numberClean=0, const char *mark=NULL, bool alwaysCreate=false)
	Useful constructor - passed reduced cost tolerance and fraction we would like fixed.
	CbcBranchToFixLots (const CbcBranchToFixLots &)
virtual CbcObject *	clone () const
	Clone.
CbcBranchToFixLots &	operator= (const CbcBranchToFixLots &rhs)
	~CbcBranchToFixLots ()
int	shallWe () const
	Does a lot of the work, Returns 0 if no good, 1 if dj, 2 if clean, 3 if both.
virtual double	infeasibility (int &preferredWay) const
	Infeasibility - large is 0.5.
virtual CbcBranchingObject *	createBranch (int way)
	Creates a branching object.
Protected Attributes
double	djTolerance_
	Reduced cost tolerance i.e. dj has to be >= this before fixed.
double	fractionFixed_
	We only need to make sure this fraction fixed.
char *	mark_
	Never fix ones marked here.
CoinPackedMatrix	matrixByRow_
	Matrix by row.
int	depth_
	Do if depth multiple of this.
int	numberClean_
	number of ==1 rows which need to be clean
bool	alwaysCreate_
	If true then always create branch.

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Detailed Description

Define a branch class that branches so that one way variables are fixed while the other way cuts off that solution.

a) On reduced cost b) When enough ==1 or <=1 rows have been satisfied (not fixed - satisfied)

Definition at line 198 of file CbcBranchCut.hpp.

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Constructor & Destructor Documentation

CbcBranchToFixLots::CbcBranchToFixLots

(

)

CbcBranchToFixLots::CbcBranchToFixLots	(	CbcModel *	model,
		double	djTolerance,
		double	fractionFixed,
		int	depth,
		int	numberClean = 0,
		const char *	mark = NULL,
		bool	alwaysCreate = false
	)

Useful constructor - passed reduced cost tolerance and fraction we would like fixed.

Also depth level to do at. Also passed number of 1 rows which when clean triggers fix Always does if all 1 rows cleaned up and number>0 or if fraction columns reached Also whether to create branch if can't reach fraction.

CbcBranchToFixLots::CbcBranchToFixLots

(

const CbcBranchToFixLots &

)

CbcBranchToFixLots::~CbcBranchToFixLots

(

)

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Member Function Documentation

virtual CbcObject* CbcBranchToFixLots::clone

(

)

const [virtual]

Clone.

Reimplemented from CbcBranchCut.

CbcBranchToFixLots& CbcBranchToFixLots::operator=

(

const CbcBranchToFixLots &

rhs

)

int CbcBranchToFixLots::shallWe

(

)

const

Does a lot of the work, Returns 0 if no good, 1 if dj, 2 if clean, 3 if both.

virtual double CbcBranchToFixLots::infeasibility

(

int &

preferredWay

)

const [virtual]

Infeasibility - large is 0.5.

Reimplemented from CbcBranchCut.

virtual CbcBranchingObject* CbcBranchToFixLots::createBranch

(

int

way

)

[virtual]

Creates a branching object.

Reimplemented from CbcBranchCut.

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Member Data Documentation

double CbcBranchToFixLots::djTolerance_ [protected]

Reduced cost tolerance i.e. dj has to be >= this before fixed.

Definition at line 247 of file CbcBranchCut.hpp.

double CbcBranchToFixLots::fractionFixed_ [protected]

We only need to make sure this fraction fixed.

Definition at line 249 of file CbcBranchCut.hpp.

char* CbcBranchToFixLots::mark_ [protected]

Never fix ones marked here.

Definition at line 251 of file CbcBranchCut.hpp.

CoinPackedMatrix CbcBranchToFixLots::matrixByRow_ [protected]

Matrix by row.

Definition at line 253 of file CbcBranchCut.hpp.

int CbcBranchToFixLots::depth_ [protected]

Do if depth multiple of this.

Definition at line 255 of file CbcBranchCut.hpp.

int CbcBranchToFixLots::numberClean_ [protected]

number of ==1 rows which need to be clean

Definition at line 257 of file CbcBranchCut.hpp.

bool CbcBranchToFixLots::alwaysCreate_ [protected]

If true then always create branch.

Definition at line 259 of file CbcBranchCut.hpp.

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

• /home/coin/SVN-release/CoinAll-1.1.0/Cbc/src/CbcBranchCut.hpp

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