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:

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Collaboration diagram for CbcBranchToFixLots:

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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)
	Assignment operator.
	~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_
	data
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.

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.

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 & )