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duprow_action Class Reference

Detect and remove duplicate rows. More...

#include <CoinPresolveDupcol.hpp>

+ Inheritance diagram for duprow_action:
+ Collaboration diagram for duprow_action:


struct  action

Public Member Functions

const char * name () const
 A name for debug printing. More...
void postsolve (CoinPostsolveMatrix *prob) const
 Apply the postsolve transformation for this particular presolve action. More...
- Public Member Functions inherited from CoinPresolveAction
 CoinPresolveAction (const CoinPresolveAction *next)
 Construct a postsolve object and add it to the transformation list. More...
void setNext (const CoinPresolveAction *nextAction)
 modify next (when building rather than passing) More...
virtual ~CoinPresolveAction ()
 Virtual destructor. More...

Static Public Member Functions

static const CoinPresolveActionpresolve (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. More...

Private Member Functions

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

Private Attributes

const int nactions_
const action *const actions_

Additional Inherited Members

- Public Attributes inherited from CoinPresolveAction
const CoinPresolveActionnext
 The next presolve transformation. More...

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::duprow_action ( )

Definition at line 97 of file CoinPresolveDupcol.hpp.

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

Definition at line 103 of file CoinPresolveDupcol.hpp.

Member Function Documentation

const char* duprow_action::name ( ) const

A name for debug printing.

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

Implements CoinPresolveAction.

static const CoinPresolveAction* duprow_action::presolve ( CoinPresolveMatrix prob,
const CoinPresolveAction next 
void duprow_action::postsolve ( CoinPostsolveMatrix prob) const

Apply the postsolve transformation for this particular presolve action.

Implements CoinPresolveAction.

Member Data Documentation

const int duprow_action::nactions_

Definition at line 94 of file CoinPresolveDupcol.hpp.

const action* const duprow_action::actions_

Definition at line 95 of file CoinPresolveDupcol.hpp.

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