twoxtwo_action Class Reference
Detect interesting 2 by 2 blocks. More...
#include <CoinPresolveDupcol.hpp>
Classes | |
| struct | action |
Public Member Functions | |
| const char * | name () const |
| A name for debug printing. | |
| void | postsolve (CoinPostsolveMatrix *prob) const |
| Apply the postsolve transformation for this particular presolve action. | |
| ~twoxtwo_action () | |
Static Public Member Functions | |
| static const CoinPresolveAction * | presolve (CoinPresolveMatrix *prob, const CoinPresolveAction *next) |
Private Member Functions | |
| twoxtwo_action () | |
| twoxtwo_action (int nactions, const action *actions, const CoinPresolveAction *next) | |
Private Attributes | |
| const int | nactions_ |
| const action *const | actions_ |
Detailed Description
Detect interesting 2 by 2 blocks.
If a variable has two entries and for each row there are only two entries with same other variable then we can get rid of one constraint and modify costs.
This is a work in progress - I need more examples
Definition at line 163 of file CoinPresolveDupcol.hpp.
Constructor & Destructor Documentation
| twoxtwo_action::twoxtwo_action | ( | ) | [inline, private] |
Definition at line 179 of file CoinPresolveDupcol.hpp.
| twoxtwo_action::twoxtwo_action | ( | int | nactions, | |
| const action * | actions, | |||
| const CoinPresolveAction * | next | |||
| ) | [inline, private] |
Definition at line 180 of file CoinPresolveDupcol.hpp.
| twoxtwo_action::~twoxtwo_action | ( | ) | [inline] |
Definition at line 194 of file CoinPresolveDupcol.hpp.
References actions_.
Member Function Documentation
| const char* twoxtwo_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* twoxtwo_action::presolve | ( | CoinPresolveMatrix * | prob, | |
| const CoinPresolveAction * | next | |||
| ) | [static] |
| void twoxtwo_action::postsolve | ( | CoinPostsolveMatrix * | prob | ) | const [virtual] |
Apply the postsolve transformation for this particular presolve action.
Implements CoinPresolveAction.
Member Data Documentation
const int twoxtwo_action::nactions_ [private] |
Definition at line 176 of file CoinPresolveDupcol.hpp.
const action* const twoxtwo_action::actions_ [private] |
Definition at line 177 of file CoinPresolveDupcol.hpp.
Referenced by ~twoxtwo_action().
The documentation for this class was generated from the following file:
- /home/coin/svn-release/Bcp-1.3.8/CoinUtils/src/CoinPresolveDupcol.hpp
