CglTwomir Class Reference

Twostep MIR Cut Generator Class. More...

#include <CglTwomir.hpp>

Inheritance diagram for CglTwomir:

[legend]Collaboration diagram for CglTwomir:


Public Member Functions
Generate Cuts
virtual void	generateCuts (const OsiSolverInterface &si, OsiCuts &cs, const CglTreeInfo info=CglTreeInfo()) const
	Generate Two step MIR cuts either from the tableau rows or from the formulation rows.
virtual bool	needsOptimalBasis () const
	Return true if needs optimal basis to do cuts (will return true).
Change criterion on which scalings to use (default = 1,1,1,1)
void	setMirScale (int tmin, int tmax)
	Set.
void	setTwomirScale (int qmin, int qmax)
	Set.
void	setAMax (int a)
	Set.
void	setMaxElements (int n)
	Set.
void	setCutTypes (bool mir, bool twomir, bool tab, bool form)
	Set.
void	setFormulationRows (int n)
	Set.
int	getTmin () const
	Get.
int	getTmax () const
	Set.
int	getQmin () const
	Set.
int	getQmax () const
	Set.
int	getAmax () const
	Set.
int	getMaxElements () const
	Set.
int	getIfMir () const
	Set.
int	getIfTwomir () const
	Set.
int	getIfTableau () const
	Set.
int	getIfFormulation () const
	Set.
Constructors and destructors
	CglTwomir ()
	Default constructor.
	CglTwomir (const CglTwomir &)
	Copy constructor.
virtual CglCutGenerator *	clone () const
	Clone.
CglTwomir &	operator= (const CglTwomir &rhs)
	Assignment operator.
virtual	~CglTwomir ()
	Destructor.
virtual std::string	generateCpp (FILE *fp)
	Create C++ lines to get to current state.
Public Attributes
std::string	probname_
	Problem name.
Private Attributes
Private member data
bool	do_mir_
bool	do_2mir_
bool	do_tab_
bool	do_form_
int	t_min_
int	t_max_
	t_min - first value of t to use for tMIR inequalities
int	q_min_
	t_max - last value of t to use for tMIR inequalities
int	q_max_
	q_min - first value of t to use for 2-Step tMIR inequalities
int	a_max_
	q_max - last value of t to use for 2-Step tMIR inequalities
int	max_elements_
	a_max - maximum value of bhat/alpha
int	form_nrows_
	Maximum number of elements in cut.
Friends
void	CglTwomirUnitTest (const OsiSolverInterface *siP, const std::string mpdDir)
	A function that tests the methods in the CglTwomir class.

Detailed Description

Twostep MIR Cut Generator Class.

Definition at line 88 of file CglTwomir.hpp.

Constructor & Destructor Documentation

CglTwomir::CglTwomir ( )

Default constructor.

CglTwomir::CglTwomir ( const CglTwomir & )

Copy constructor.

virtual CglTwomir::~CglTwomir ( ) [virtual]

Destructor.

Member Function Documentation

virtual void CglTwomir::generateCuts	(	const OsiSolverInterface &	si,
		OsiCuts &	cs,
		const CglTreeInfo	info = `CglTreeInfo()`
	)			const `[virtual]`

Generate Two step MIR cuts either from the tableau rows or from the formulation rows.

Implements CglCutGenerator.

virtual bool CglTwomir::needsOptimalBasis ( ) const [virtual]

Return true if needs optimal basis to do cuts (will return true).

Reimplemented from CglCutGenerator.

void CglTwomir::setMirScale	(	int	tmin,
		int	tmax
	)			`[inline]`

Set.

Definition at line 112 of file CglTwomir.hpp.

References t_max_, and t_min_.

void CglTwomir::setTwomirScale	(	int	qmin,
		int	qmax
	)			`[inline]`

Set.

Definition at line 113 of file CglTwomir.hpp.

References q_max_, and q_min_.

void CglTwomir::setAMax ( int a ) [inline]

Set.

Definition at line 114 of file CglTwomir.hpp.

References a_max_.

void CglTwomir::setMaxElements ( int n ) [inline]

Set.

Definition at line 115 of file CglTwomir.hpp.

References max_elements_.

void CglTwomir::setCutTypes	(	bool	mir,
		bool	twomir,
		bool	tab,
		bool	form
	)			`[inline]`

Set.

Definition at line 116 of file CglTwomir.hpp.

References do_2mir_, do_form_, do_mir_, and do_tab_.

void CglTwomir::setFormulationRows ( int n ) [inline]

Set.

Definition at line 118 of file CglTwomir.hpp.

References form_nrows_.

int CglTwomir::getTmin ( ) const [inline]

Get.

Definition at line 121 of file CglTwomir.hpp.

References t_min_.

int CglTwomir::getTmax ( ) const [inline]

Set.

Definition at line 122 of file CglTwomir.hpp.

References t_max_.

int CglTwomir::getQmin ( ) const [inline]

Set.

Definition at line 123 of file CglTwomir.hpp.

References q_min_.

int CglTwomir::getQmax ( ) const [inline]

Set.

Definition at line 124 of file CglTwomir.hpp.

References q_max_.

int CglTwomir::getAmax ( ) const [inline]

Set.

Definition at line 125 of file CglTwomir.hpp.

References a_max_.

int CglTwomir::getMaxElements ( ) const [inline]

Set.

Definition at line 126 of file CglTwomir.hpp.

References max_elements_.

int CglTwomir::getIfMir ( ) const [inline]

Set.

Definition at line 127 of file CglTwomir.hpp.

References do_mir_.

int CglTwomir::getIfTwomir ( ) const [inline]

Set.

Definition at line 128 of file CglTwomir.hpp.

References do_2mir_.

int CglTwomir::getIfTableau ( ) const [inline]

Set.

Definition at line 129 of file CglTwomir.hpp.

References do_tab_.

int CglTwomir::getIfFormulation ( ) const [inline]

Set.

Definition at line 130 of file CglTwomir.hpp.

References do_form_.

virtual CglCutGenerator* CglTwomir::clone ( ) const [virtual]

Clone.

Implements CglCutGenerator.

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

Assignment operator.

virtual std::string CglTwomir::generateCpp ( FILE * fp ) [virtual]

Create C++ lines to get to current state.

Reimplemented from CglCutGenerator.

Friends And Related Function Documentation

void CglTwomirUnitTest	(	const OsiSolverInterface *	siP,
		const std::string	mpdDir
	)			`[friend]`

A function that tests the methods in the CglTwomir class.

The only reason for it not to be a member method is that this way it doesn't have to be compiled into the library. And that's a gain, because the library should be compiled with optimization on, but this method should be compiled with debugging.