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# CglMixedIntegerRounding2 Class Reference

Mixed Integer Rounding Cut Generator Class. More...

`#include <CglMixedIntegerRounding2.hpp>`

Inheritance diagram for CglMixedIntegerRounding2:

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Collaboration diagram for CglMixedIntegerRounding2:

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List of all members.

## Public Member Functions
Generate Cuts
virtual void | generateCuts (const OsiSolverInterface &si, OsiCuts &cs, const CglTreeInfo info=CglTreeInfo()) const
| Generate Mixed Integer Rounding cuts for the model data contained in si.
Constructors and destructors
| CglMixedIntegerRounding2 ()
| Default constructor.
| CglMixedIntegerRounding2 (const int maxaggr, const bool multiply, const int criterion, const int preproc=-1)
| Alternate Constructor.
| CglMixedIntegerRounding2 (const CglMixedIntegerRounding2 &)
| Copy constructor.
virtual CglCutGenerator * | clone () const
| Clone.
CglMixedIntegerRounding2 & | operator= (const CglMixedIntegerRounding2 &rhs)
| Assignment operator.
virtual | ~CglMixedIntegerRounding2 ()
| Destructor.
virtual void | refreshSolver (OsiSolverInterface *solver)
| This can be used to refresh any inforamtion.
virtual std::string | generateCpp (FILE *fp)
| Create C++ lines to get to current state.
Set and get methods
void | setMAXAGGR_ (int maxaggr)
| Set MAXAGGR_.
int | getMAXAGGR_ () const
| Get MAXAGGR_.
void | setMULTIPLY_ (bool multiply)
| Set MULTIPLY_.
bool | getMULTIPLY_ () const
| Get MULTIPLY_.
void | setCRITERION_ (int criterion)
| Set CRITERION_.
int | getCRITERION_ () const
| Get CRITERION_.
void | setDoPreproc (int value)
| Set doPreproc.
bool | getDoPreproc () const
| Get doPreproc.
## Private Types
| ROW_UNDEFINED
| ROW_VARUB
| After the row is flipped to 'L', the row has exactly two variables: one is negative binary and the other is a continous, and the RHS is zero.
| ROW_VARLB
| After the row is flipped to 'L', the row has exactly two variables: one is positive binary and the other is a continous, and the RHS is zero.
| ROW_VAREQ
| The row sense is 'E', the row has exactly two variables: one is binary and the other is a continous, and the RHS is zero.
| ROW_MIX
| ROW_CONT
| ROW_INT
| ROW_OTHER
enum | RowType { ROW_UNDEFINED, ROW_VARUB, ROW_VARLB, ROW_VAREQ, ROW_MIX, ROW_CONT, ROW_INT, ROW_OTHER }
## Private Member Functions
void | gutsOfConstruct (const int maxaggr, const bool multiply, const int criterion, const int preproc)
void | gutsOfDelete ()
void | gutsOfCopy (const CglMixedIntegerRounding2 &rhs)
void | mixIntRoundPreprocess (const OsiSolverInterface &si) const
RowType | determineRowType (const OsiSolverInterface &si, const int rowLen, const int *ind, const double *coef, const char sense, const double rhs) const
void | generateMirCuts (const OsiSolverInterface &si, const double *xlp, const double *colUpperBound, const double *colLowerBound, const CoinPackedMatrix &matrixByRow, const double *LHS, const double *coefByRow, const int *colInds, const int *rowStarts, const int *rowLengths, const CoinPackedMatrix &matrixByCol, const double *coefByCol, const int *rowInds, const int *colStarts, const int *colLengths, OsiCuts &cs) const
void | copyRowSelected (const int iAggregate, const int rowSelected, CoinIndexedVector &setRowsAggregated, int *listRowsAggregated, double *xlpExtra, const char sen, const double rhs, const double lhs, const CoinPackedMatrix &matrixByRow, CoinIndexedVector &rowToAggregate, double &rhsToAggregate) const
bool | selectRowToAggregate (const OsiSolverInterface &si, const CoinIndexedVector &rowAggregated, const double *colUpperBound, const double *colLowerBound, const CoinIndexedVector &setRowsAggregated, const double *xlp, const double *coefByCol, const int *rowInds, const int *colStarts, const int *colLengths, int &rowSelected, int &colSelected) const
void | aggregateRow (const int colSelected, CoinIndexedVector &rowToAggregate, double rhs, CoinIndexedVector &rowAggregated, double &rhsAggregated) const
bool | isLowerSubst (const double inf, const double aj, const double xlp, const double LB, const double UB) const
bool | boundSubstitution (const OsiSolverInterface &si, const CoinIndexedVector &rowAggregated, const double *xlp, const double *xlpExtra, const double *colUpperBound, const double *colLowerBound, CoinIndexedVector &mixedKnapsack, double &rhsMixedKnapsack, double &sStar, CoinIndexedVector &contVariablesInS) const
bool | cMirSeparation (const OsiSolverInterface &si, const CoinPackedMatrix &matrixByRow, const CoinIndexedVector &rowAggregated, const int *listRowsAggregated, const char *sense, const double *RHS, const double *coefByRow, const int *colInds, const int *rowStarts, const int *rowLengths, const double *xlp, const double sStar, const double *colUpperBound, const double *colLowerBound, const CoinIndexedVector &mixedKnapsack, const double &rhsMixedKnapsack, const CoinIndexedVector &contVariablesInS, CoinIndexedVector *workVector, OsiRowCut &flowCut) const
void | cMirInequality (const int numInt, const double delta, const double numeratorBeta, const int *knapsackIndices, const double *knapsackElements, const double *xlp, const double sStar, const double *colUpperBound, const CoinIndexedVector &setC, CoinIndexedVector &cMIR, double &rhscMIR, double &sCoef, double &violation) const
double | functionG (const double d, const double f) const
void | printStats (std::ofstream &fout, const bool hasCut, const OsiSolverInterface &si, const CoinIndexedVector &rowAggregated, const double &rhsAggregated, const double *xlp, const double *xlpExtra, const int *listRowsAggregated, const int *listColsSelected, const int level, const double *colUpperBound, const double *colLowerBound) const
## Private Attributes
int | MAXAGGR_
bool | MULTIPLY_
int | CRITERION_
double | EPSILON_
int | UNDEFINED_
| There is no variable upper bound or variable lower bound defined.
double | TOLERANCE_
int | doPreproc_
| Controls the preprocessing of the matrix to identify rows suitable for cut generation.
int | numRows_
int | numCols_
bool | doneInitPre_
CglMixIntRoundVUB2 * | vubs_
CglMixIntRoundVLB2 * | vlbs_
RowType * | rowTypes_
int * | indRows_
int | numRowMix_
int * | indRowMix_
int | numRowCont_
int * | indRowCont_
int | numRowInt_
int * | indRowInt_
int | numRowContVB_
int * | indRowContVB_
char * | integerType_
char * | sense_
double * | RHS_
## Friends
void | CglMixedIntegerRounding2UnitTest (const OsiSolverInterface *siP, const std::string mpdDir)

## Detailed Description

Mixed Integer Rounding Cut Generator Class.

Definition at line 87 of file CglMixedIntegerRounding2.hpp.

## Member Enumeration Documentation

enum CglMixedIntegerRounding2::RowType`[private]`

Enumerator:

  ROW_UNDEFINED |
  ROW_VARUB | After the row is flipped to 'L', the row has exactly two variables: one is negative binary and the other is a continous, and the RHS is zero.
  ROW_VARLB | After the row is flipped to 'L', the row has exactly two variables: one is positive binary and the other is a continous, and the RHS is zero.
  ROW_VAREQ | The row sense is 'E', the row has exactly two variables: one is binary and the other is a continous, and the RHS is zero.
  ROW_MIX |
  ROW_CONT |
  ROW_INT |
  ROW_OTHER |

Definition at line 96 of file CglMixedIntegerRounding2.hpp.

## Constructor & Destructor Documentation

CglMixedIntegerRounding2::CglMixedIntegerRounding2 | ( |  | ) |

Default constructor.

CglMixedIntegerRounding2::CglMixedIntegerRounding2 | ( | const int | maxaggr,
|  | const bool | multiply,
|  | const int | criterion,
|  | const int | preproc = `-1` |
| ) |  |  |

Alternate Constructor.

CglMixedIntegerRounding2::CglMixedIntegerRounding2 | ( | const CglMixedIntegerRounding2 & |  | ) |

Copy constructor.

virtual CglMixedIntegerRounding2::~CglMixedIntegerRounding2 | ( |  | ) | `[virtual]`

Destructor.

## Member Function Documentation

virtual void CglMixedIntegerRounding2::generateCuts | ( | const OsiSolverInterface & | si,
|  | OsiCuts & | cs,
|  | const CglTreeInfo | info = `CglTreeInfo()` |
| ) |  |  | const`[virtual]`

Generate Mixed Integer Rounding cuts for the model data contained in si.

The generated cuts are inserted in the collection of cuts cs.

Implements CglCutGenerator.

virtual CglCutGenerator* CglMixedIntegerRounding2::clone | ( |  | ) | const`[virtual]`

Clone.

Implements CglCutGenerator.

CglMixedIntegerRounding2& CglMixedIntegerRounding2::operator= | ( | const CglMixedIntegerRounding2 & | rhs | ) |

Assignment operator.

virtual void CglMixedIntegerRounding2::refreshSolver | ( | OsiSolverInterface * | solver | ) | `[virtual]`

This can be used to refresh any inforamtion.

Reimplemented from CglCutGenerator.

virtual std::string CglMixedIntegerRounding2::generateCpp | ( | FILE * | fp | ) | `[virtual]`

Create C++ lines to get to current state.

Reimplemented from CglCutGenerator.

void CglMixedIntegerRounding2::setMAXAGGR_ | ( | int | maxaggr | ) | `[inline]`

Set MAXAGGR_.

Definition at line 171 of file CglMixedIntegerRounding2.hpp.

References MAXAGGR_.

int CglMixedIntegerRounding2::getMAXAGGR_ | ( |  | ) | const`[inline]`

Get MAXAGGR_.

Definition at line 182 of file CglMixedIntegerRounding2.hpp.

References MAXAGGR_.

void CglMixedIntegerRounding2::setMULTIPLY_ | ( | bool | multiply | ) | `[inline]`

Set MULTIPLY_.

Definition at line 185 of file CglMixedIntegerRounding2.hpp.

References MULTIPLY_.

bool CglMixedIntegerRounding2::getMULTIPLY_ | ( |  | ) | const`[inline]`

Get MULTIPLY_.

Definition at line 188 of file CglMixedIntegerRounding2.hpp.

References MULTIPLY_.

void CglMixedIntegerRounding2::setCRITERION_ | ( | int | criterion | ) | `[inline]`

Set CRITERION_.

Definition at line 191 of file CglMixedIntegerRounding2.hpp.

References CRITERION_.

int CglMixedIntegerRounding2::getCRITERION_ | ( |  | ) | const`[inline]`

Get CRITERION_.

Definition at line 202 of file CglMixedIntegerRounding2.hpp.

References CRITERION_.

void CglMixedIntegerRounding2::setDoPreproc | ( | int | value | ) |

Set doPreproc.

bool CglMixedIntegerRounding2::getDoPreproc | ( |  | ) | const

Get doPreproc.

void CglMixedIntegerRounding2::gutsOfConstruct | ( | const int | maxaggr,
|  | const bool | multiply,
|  | const int | criterion,
|  | const int | preproc |
| ) |  |  | `[private]`

void CglMixedIntegerRounding2::gutsOfDelete | ( |  | ) | `[private]`

void CglMixedIntegerRounding2::gutsOfCopy | ( | const CglMixedIntegerRounding2 & | rhs | ) | `[private]`

void CglMixedIntegerRounding2::mixIntRoundPreprocess | ( | const OsiSolverInterface & | si | ) | const`[private]`

RowType CglMixedIntegerRounding2::determineRowType | ( | const OsiSolverInterface & | si,
|  | const int | rowLen,
|  | const int * | ind,
|  | const double * | coef,
|  | const char | sense,
|  | const double | rhs |
| ) |  |  | const`[private]`

void CglMixedIntegerRounding2::generateMirCuts | ( | const OsiSolverInterface & | si,
|  | const double * | xlp,
|  | const double * | colUpperBound,
|  | const double * | colLowerBound,
|  | const CoinPackedMatrix & | matrixByRow,
|  | const double * | LHS,
|  | const double * | coefByRow,
|  | const int * | colInds,
|  | const int * | rowStarts,
|  | const int * | rowLengths,
|  | const CoinPackedMatrix & | matrixByCol,
|  | const double * | coefByCol,
|  | const int * | rowInds,
|  | const int * | colStarts,
|  | const int * | colLengths,
|  | OsiCuts & | cs |
| ) |  |  | const`[private]`

void CglMixedIntegerRounding2::copyRowSelected | ( | const int | iAggregate,
|  | const int | rowSelected,
|  | CoinIndexedVector & | setRowsAggregated,
|  | int * | listRowsAggregated,
|  | double * | xlpExtra,
|  | const char | sen,
|  | const double | rhs,
|  | const double | lhs,
|  | const CoinPackedMatrix & | matrixByRow,
|  | CoinIndexedVector & | rowToAggregate,
|  | double & | rhsToAggregate |
| ) |  |  | const`[private]`

bool CglMixedIntegerRounding2::selectRowToAggregate | ( | const OsiSolverInterface & | si,
|  | const CoinIndexedVector & | rowAggregated,
|  | const double * | colUpperBound,
|  | const double * | colLowerBound,
|  | const CoinIndexedVector & | setRowsAggregated,
|  | const double * | xlp,
|  | const double * | coefByCol,
|  | const int * | rowInds,
|  | const int * | colStarts,
|  | const int * | colLengths,
|  | int & | rowSelected,
|  | int & | colSelected |
| ) |  |  | const`[private]`

void CglMixedIntegerRounding2::aggregateRow | ( | const int | colSelected,
|  | CoinIndexedVector & | rowToAggregate,
|  | double | rhs,
|  | CoinIndexedVector & | rowAggregated,
|  | double & | rhsAggregated |
| ) |  |  | const`[private]`

bool CglMixedIntegerRounding2::isLowerSubst | ( | const double | inf,
|  | const double | aj,
|  | const double | xlp,
|  | const double | LB,
|  | const double | UB |
| ) |  |  | const`[inline, private]`

bool CglMixedIntegerRounding2::boundSubstitution | ( | const OsiSolverInterface & | si,
|  | const CoinIndexedVector & | rowAggregated,
|  | const double * | xlp,
|  | const double * | xlpExtra,
|  | const double * | colUpperBound,
|  | const double * | colLowerBound,
|  | CoinIndexedVector & | mixedKnapsack,
|  | double & | rhsMixedKnapsack,
|  | double & | sStar,
|  | CoinIndexedVector & | contVariablesInS |
| ) |  |  | const`[private]`

bool CglMixedIntegerRounding2::cMirSeparation | ( | const OsiSolverInterface & | si,
|  | const CoinPackedMatrix & | matrixByRow,
|  | const CoinIndexedVector & | rowAggregated,
|  | const int * | listRowsAggregated,
|  | const char * | sense,
|  | const double * | RHS,
|  | const double * | coefByRow,
|  | const int * | colInds,
|  | const int * | rowStarts,
|  | const int * | rowLengths,
|  | const double * | xlp,
|  | const double | sStar,
|  | const double * | colUpperBound,
|  | const double * | colLowerBound,
|  | const CoinIndexedVector & | mixedKnapsack,
|  | const double & | rhsMixedKnapsack,
|  | const CoinIndexedVector & | contVariablesInS,
|  | CoinIndexedVector * | workVector,
|  | OsiRowCut & | flowCut |
| ) |  |  | const`[private]`

void CglMixedIntegerRounding2::cMirInequality | ( | const int | numInt,
|  | const double | delta,
|  | const double | numeratorBeta,
|  | const int * | knapsackIndices,
|  | const double * | knapsackElements,
|  | const double * | xlp,
|  | const double | sStar,
|  | const double * | colUpperBound,
|  | const CoinIndexedVector & | setC,
|  | CoinIndexedVector & | cMIR,
|  | double & | rhscMIR,
|  | double & | sCoef,
|  | double & | violation |
| ) |  |  | const`[private]`

double CglMixedIntegerRounding2::functionG | ( | const double | d,
|  | const double | f |
| ) |  |  | const`[inline, private]`

void CglMixedIntegerRounding2::printStats | ( | std::ofstream & | fout,
|  | const bool | hasCut,
|  | const OsiSolverInterface & | si,
|  | const CoinIndexedVector & | rowAggregated,
|  | const double & | rhsAggregated,
|  | const double * | xlp,
|  | const double * | xlpExtra,
|  | const int * | listRowsAggregated,
|  | const int * | listColsSelected,
|  | const int | level,
|  | const double * | colUpperBound,
|  | const double * | colLowerBound |
| ) |  |  | const`[private]`

## Friends And Related Function Documentation

void CglMixedIntegerRounding2UnitTest | ( | const OsiSolverInterface * | siP,
|  | const std::string | mpdDir |
| ) |  |  | `[friend]`

## Member Data Documentation

int CglMixedIntegerRounding2::MAXAGGR_`[private]`

Definition at line 362 of file CglMixedIntegerRounding2.hpp.

Referenced by getMAXAGGR_(), and setMAXAGGR_().

bool CglMixedIntegerRounding2::MULTIPLY_`[private]`

Definition at line 364 of file CglMixedIntegerRounding2.hpp.

Referenced by getMULTIPLY_(), and setMULTIPLY_().

int CglMixedIntegerRounding2::CRITERION_`[private]`

Definition at line 366 of file CglMixedIntegerRounding2.hpp.

Referenced by getCRITERION_(), and setCRITERION_().

double CglMixedIntegerRounding2::EPSILON_`[private]`

Definition at line 368 of file CglMixedIntegerRounding2.hpp.

int CglMixedIntegerRounding2::UNDEFINED_`[private]`

There is no variable upper bound or variable lower bound defined.

Definition at line 370 of file CglMixedIntegerRounding2.hpp.

double CglMixedIntegerRounding2::TOLERANCE_`[private]`

Definition at line 372 of file CglMixedIntegerRounding2.hpp.

int CglMixedIntegerRounding2::doPreproc_`[private]`

Controls the preprocessing of the matrix to identify rows suitable for cut generation.

- -1: preprocess according to solver settings;
- 0: Do preprocessing only if it has not yet been done;
- 1: Do preprocessing.

Default value: -1

Definition at line 380 of file CglMixedIntegerRounding2.hpp.

int CglMixedIntegerRounding2::numRows_`[mutable, private]`

Definition at line 382 of file CglMixedIntegerRounding2.hpp.

int CglMixedIntegerRounding2::numCols_`[mutable, private]`

Definition at line 384 of file CglMixedIntegerRounding2.hpp.

bool CglMixedIntegerRounding2::doneInitPre_`[mutable, private]`

Definition at line 386 of file CglMixedIntegerRounding2.hpp.

CglMixIntRoundVUB2* CglMixedIntegerRounding2::vubs_`[mutable, private]`

Definition at line 388 of file CglMixedIntegerRounding2.hpp.

CglMixIntRoundVLB2* CglMixedIntegerRounding2::vlbs_`[mutable, private]`

Definition at line 390 of file CglMixedIntegerRounding2.hpp.

RowType* CglMixedIntegerRounding2::rowTypes_`[mutable, private]`

Definition at line 392 of file CglMixedIntegerRounding2.hpp.

int* CglMixedIntegerRounding2::indRows_`[mutable, private]`

Definition at line 394 of file CglMixedIntegerRounding2.hpp.

int CglMixedIntegerRounding2::numRowMix_`[mutable, private]`

Definition at line 396 of file CglMixedIntegerRounding2.hpp.

int* CglMixedIntegerRounding2::indRowMix_`[mutable, private]`

Definition at line 398 of file CglMixedIntegerRounding2.hpp.

int CglMixedIntegerRounding2::numRowCont_`[mutable, private]`

Definition at line 400 of file CglMixedIntegerRounding2.hpp.

int* CglMixedIntegerRounding2::indRowCont_`[mutable, private]`

Definition at line 402 of file CglMixedIntegerRounding2.hpp.

int CglMixedIntegerRounding2::numRowInt_`[mutable, private]`

Definition at line 404 of file CglMixedIntegerRounding2.hpp.

int* CglMixedIntegerRounding2::indRowInt_`[mutable, private]`

Definition at line 406 of file CglMixedIntegerRounding2.hpp.

int CglMixedIntegerRounding2::numRowContVB_`[mutable, private]`

Definition at line 409 of file CglMixedIntegerRounding2.hpp.

int* CglMixedIntegerRounding2::indRowContVB_`[mutable, private]`

Definition at line 412 of file CglMixedIntegerRounding2.hpp.

char* CglMixedIntegerRounding2::integerType_`[mutable, private]`

Definition at line 414 of file CglMixedIntegerRounding2.hpp.

char* CglMixedIntegerRounding2::sense_`[mutable, private]`

Definition at line 416 of file CglMixedIntegerRounding2.hpp.

double* CglMixedIntegerRounding2::RHS_`[mutable, private]`

Definition at line 418 of file CglMixedIntegerRounding2.hpp.

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

- /home/coin/SVN-release/Cgl-0.52.0/Cgl/src/CglMixedIntegerRounding2/CglMixedIntegerRounding2.hpp