duprow_action Class Reference

Detect and remove duplicate rows. More...

#include <CoinPresolveDupcol.hpp>

Inheritance diagram for duprow_action:

Collaboration diagram for duprow_action:

Classes
struct	action

Public Member Functions
const char *	name () const
	Construct a postsolve object and add it to the transformation list.
void	postsolve (CoinPostsolveMatrix *prob) const
	Apply the postsolve transformation for this particular presolve action.
Public Member Functions inherited from CoinPresolveAction
virtual	~CoinPresolveAction ()
	Virtual destructor.

Static Public Member Functions
static const CoinPresolveAction *	presolve (CoinPresolveMatrix *prob, const CoinPresolveAction *next)
Static Public Member Functions inherited from CoinPresolveAction
static void	throwCoinError (const char *error, const char *ps_routine)
	Stub routine to throw exceptions.

Private Member Functions
	duprow_action ()
	duprow_action (int nactions, const action *actions, const CoinPresolveAction *next)

Additional Inherited Members
Public Attributes inherited from CoinPresolveAction
const CoinPresolveAction *	next
	The next presolve transformation.

Detailed Description

Detect and remove duplicate rows.

The algorithm to detect duplicate rows is as outlined for dupcol_action.

If the feasible interval for one constraint is strictly contained in the other, the tighter (contained) constraint is kept. If the feasible intervals are disjoint, the problem is infeasible. If the feasible intervals overlap, both constraints are kept.

duprow_action is definitely a work in progress; postsolve is unimplemented. This doesn't matter as it uses useless_constraint.

Definition at line 87 of file CoinPresolveDupcol.hpp.

Constructor & Destructor Documentation

duprow_action() [1/2]

duprow_action::duprow_action ( )

inlineprivate

Definition at line 97 of file CoinPresolveDupcol.hpp.

duprow_action() [2/2]

duprow_action::duprow_action ( int nactions, const action * actions, const CoinPresolveAction * next )

inlineprivate

Definition at line 103 of file CoinPresolveDupcol.hpp.

Member Function Documentation

name()

const char * duprow_action::name ( ) const

virtual

Construct a postsolve object and add it to the transformation list.

This is an `add to head' operation. This object will point to the one passed as the parameter. */ CoinPresolveAction(const CoinPresolveAction *next) : next(next) { } modify next (when building rather than passing) inline void setNext(const CoinPresolveAction *nextAction) { next = nextAction; }

/*! A name for debug printing.

It is expected that the name is not stored in the transform itself.

Implements CoinPresolveAction.

presolve()

const CoinPresolveAction * duprow_action::presolve ( CoinPresolveMatrix * prob, const CoinPresolveAction * next )

static

postsolve()

void duprow_action::postsolve ( CoinPostsolveMatrix * prob ) const

virtual

Apply the postsolve transformation for this particular presolve action.

Implements CoinPresolveAction.

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

• /builddir/build/BUILD/coin-or-CoinUtils-2.11.12-build/CoinUtils-releases-2.11.12/CoinUtils/src/CoinPresolveDupcol.hpp