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duprow_action Class Reference

Detect and remove duplicate rows. More...

`#include <CoinPresolveDupcol.hpp>`

Inheritance diagram for duprow_action:
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Collaboration diagram for duprow_action:
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## Classes
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 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. 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 CoinPresolveAction * | next
| 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 | ( |  | ) |
| inline private

Definition at line 97 of file CoinPresolveDupcol.hpp.

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

Definition at line 103 of file CoinPresolveDupcol.hpp.

## Member Function Documentation

const char* duprow_action::name | ( |  | ) | const
| virtual

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
| ) |  |
| static

void duprow_action::postsolve | ( | CoinPostsolveMatrix * | prob | ) | const
| virtual

Apply the postsolve transformation for this particular presolve action.

Implements CoinPresolveAction.

## Member Data Documentation

const int duprow_action::nactions_
| private

Definition at line 94 of file CoinPresolveDupcol.hpp.

const action* const duprow_action::actions_
| private

Definition at line 95 of file CoinPresolveDupcol.hpp.

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

- /tmp/Clp-1.17.6/CoinUtils/src/CoinPresolveDupcol.hpp