# OsiSolverLink Class Reference

This is to allow the user to replace initialSolve and resolve This version changes coefficients. More...

`#include <CbcLinked.hpp>`

Collaboration diagram for OsiSolverLink:
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List of all members.

## Public Member Functions
Solve methods
virtual void | initialSolve ()
| Solve initial LP relaxation.
virtual void | resolve ()
| Resolve an LP relaxation after problem modification.
virtual int | fathom (bool allFixed)
| Problem specific Returns -1 if node fathomed and no solution 0 if did nothing 1 if node fathomed and solution allFixed is true if all LinkedBound variables are fixed.
double * | nonlinearSLP (int numberPasses, double deltaTolerance)
| Solves nonlinear problem from CoinModel using SLP - may be used as crash for other algorithms when number of iterations small.
double | linearizedBAB (CglStored *cut)
| Solve linearized quadratic objective branch and bound.
double * | heuristicSolution (int numberPasses, double deltaTolerance, int mode)
| Solves nonlinear problem from CoinModel using SLP - and then tries to get heuristic solution Returns solution array mode - 0 just get continuous 1 round and try normal bab 2 use defaultBound_ to bound integer variables near current solution.
int | doAOCuts (CglTemporary *cutGen, const double *solution, const double *solution2)
| Do OA cuts.
Constructors and destructors
| OsiSolverLink ()
| Default Constructor.
| OsiSolverLink (CoinModel &modelObject)
| This creates from a coinModel object.
void | load (CoinModel &modelObject, bool tightenBounds=false, int logLevel=1)
virtual OsiSolverInterface * | clone (bool copyData=true) const
| Clone.
| OsiSolverLink (const OsiSolverLink &)
| Copy constructor.
OsiSolverLink & | operator= (const OsiSolverLink &rhs)
| Assignment operator.
virtual | ~OsiSolverLink ()
| Destructor.
Sets and Gets
void | addBoundModifier (bool upperBoundAffected, bool useUpperBound, int whichVariable, int whichVariableAffected, double multiplier=1.0)
| Add a bound modifier.
int | updateCoefficients (ClpSimplex *solver, CoinPackedMatrix *matrix)
| Update coefficients - returns number updated if in updating mode.
void | analyzeObjects ()
| Analyze constraints to see which are convex (quadratic).
void | addTighterConstraints ()
| Add reformulated bilinear constraints.
double | bestObjectiveValue () const
| Objective value of best solution found internally.
void | setBestObjectiveValue (double value)
| Set objective value of best solution found internally.
const double * | bestSolution () const
| Best solution found internally.
void | setBestSolution (const double *solution, int numberColumns)
| Set best solution found internally.
void | setSpecialOptions2 (int value)
| Set special options.
void | sayConvex (bool convex)
| Say convex (should work it out) - if convex false then strictly concave.
int | specialOptions2 () const
| Get special options.
CoinPackedMatrix * | cleanMatrix () const
| Clean copy of matrix So we can add rows.
CoinPackedMatrix * | originalRowCopy () const
| Row copy of matrix Just genuine columns and rows Linear part.
ClpSimplex * | quadraticModel () const
| Copy of quadratic model if one.
CoinPackedMatrix * | quadraticRow (int rowNumber, double *linear) const
| Gets correct form for a quadratic row - user to delete.
double | defaultMeshSize () const
| Default meshSize.
void | setDefaultMeshSize (double value)
double | defaultBound () const
| Default maximumbound.
void | setDefaultBound (double value)
void | setIntegerPriority (int value)
| Set integer priority.
int | integerPriority () const
| Get integer priority.
int | objectiveVariable () const
| Objective transfer variable if one.
void | setBiLinearPriority (int value)
| Set biLinear priority.
int | biLinearPriority () const
| Get biLinear priority.
const CoinModel * | coinModel () const
| Return CoinModel.
void | setBiLinearPriorities (int value, double meshSize=1.0)
| Set all biLinear priorities on x-x variables.
void | setBranchingStrategyOnVariables (int strategyValue, int priorityValue=-1, int mode=7)
| Set options and priority on all or some biLinear variables 1 - on I-I 2 - on I-x 4 - on x-x or combinations.
void | setMeshSizes (double value)
| Set all mesh sizes on x-x variables.
void | setFixedPriority (int priorityValue)
| Two tier integer problem where when set of variables with priority less than this are fixed the problem becomes an easier integer problem.
## Protected Member Functions
functions
void | gutsOfDestructor (bool justNullify=false)
| Do real work of initialize.
void | gutsOfCopy (const OsiSolverLink &rhs)
| Do real work of copy.
## Protected Attributes
Private member data
CoinPackedMatrix * | matrix_
| Clean copy of matrix Marked coefficients will be multiplied by L or U.
CoinPackedMatrix * | originalRowCopy_
| Row copy of matrix Just genuine columns and rows.
ClpSimplex * | quadraticModel_
| Copy of quadratic model if one.
int | numberNonLinearRows_
| Number of rows with nonLinearities.
int * | startNonLinear_
| Starts of lists.
int * | rowNonLinear_
| Row number for a list.
int * | convex_
| Indicator whether is convex, concave or neither -1 concave, 0 neither, +1 convex.
int * | whichNonLinear_
| Indices in a list/row.
CoinModel | coinModel_
| Model in CoinModel format.
int | numberVariables_
| Number of variables in tightening phase.
OsiLinkedBound * | info_
| Information.
int | specialOptions2_
| 0 bit (1) - call fathom (may do mini B&B) 1 bit (2) - quadratic only in objective (add OA cuts) 2 bit (4) - convex 3 bit (8) - try adding OA cuts 4 bit (16) - add linearized constraints
int | objectiveRow_
| Objective transfer row if one.
int | objectiveVariable_
| Objective transfer variable if one.
double | bestObjectiveValue_
| Objective value of best solution found internally.
double | defaultMeshSize_
| Default mesh.
double | defaultBound_
| Default maximum bound.
double * | bestSolution_
| Best solution found internally.
int | integerPriority_
| Priority for integers.
int | biLinearPriority_
| Priority for bilinear.
int | numberFix_
| Number of variables which when fixed help.
int * | fixVariables_
| list of fixed variables

## Detailed Description

This is to allow the user to replace initialSolve and resolve This version changes coefficients.

Definition at line 29 of file CbcLinked.hpp.

## Constructor & Destructor Documentation

OsiSolverLink::OsiSolverLink | ( |  | ) |

Default Constructor.

OsiSolverLink::OsiSolverLink | ( | CoinModel & | modelObject | ) |

This creates from a coinModel object.

if errors.then number of sets is -1

This creates linked ordered sets information. It assumes -

for product terms syntax is yy*f(zz) also just f(zz) is allowed and even a constant

modelObject not const as may be changed as part of process.

OsiSolverLink::OsiSolverLink | ( | const OsiSolverLink & |  | ) |

Copy constructor.

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

Destructor.

## Member Function Documentation

virtual void OsiSolverLink::initialSolve | ( |  | ) | `[virtual]`

Solve initial LP relaxation.

virtual void OsiSolverLink::resolve | ( |  | ) | `[virtual]`

Resolve an LP relaxation after problem modification.

virtual int OsiSolverLink::fathom | ( | bool | allFixed | ) | `[virtual]`

Problem specific Returns -1 if node fathomed and no solution 0 if did nothing 1 if node fathomed and solution allFixed is true if all LinkedBound variables are fixed.

double* OsiSolverLink::nonlinearSLP | ( | int | numberPasses,
|  | double | deltaTolerance |
| ) |  |  |

Solves nonlinear problem from CoinModel using SLP - may be used as crash for other algorithms when number of iterations small.

Also exits if all problematical variables are changing less than deltaTolerance Returns solution array

double OsiSolverLink::linearizedBAB | ( | CglStored * | cut | ) |

Solve linearized quadratic objective branch and bound.

Return cutoff and OA cut

double* OsiSolverLink::heuristicSolution | ( | int | numberPasses,
|  | double | deltaTolerance,
|  | int | mode |
| ) |  |  |

Solves nonlinear problem from CoinModel using SLP - and then tries to get heuristic solution Returns solution array mode - 0 just get continuous 1 round and try normal bab 2 use defaultBound_ to bound integer variables near current solution.

int OsiSolverLink::doAOCuts | ( | CglTemporary * | cutGen,
|  | const double * | solution,
|  | const double * | solution2 |
| ) |  |  |

Do OA cuts.

void OsiSolverLink::load | ( | CoinModel & | modelObject,
|  | bool | tightenBounds = `false`,
|  | int | logLevel = `1` |
| ) |  |  |

virtual OsiSolverInterface* OsiSolverLink::clone | ( | bool | copyData = `true` | ) | const`[virtual]`

Clone.

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

Assignment operator.

void OsiSolverLink::addBoundModifier | ( | bool | upperBoundAffected,
|  | bool | useUpperBound,
|  | int | whichVariable,
|  | int | whichVariableAffected,
|  | double | multiplier = `1.0` |
| ) |  |  |

Add a bound modifier.

int OsiSolverLink::updateCoefficients | ( | ClpSimplex * | solver,
|  | CoinPackedMatrix * | matrix |
| ) |  |  |

Update coefficients - returns number updated if in updating mode.

void OsiSolverLink::analyzeObjects | ( |  | ) |

Analyze constraints to see which are convex (quadratic).

void OsiSolverLink::addTighterConstraints | ( |  | ) |

Add reformulated bilinear constraints.

double OsiSolverLink::bestObjectiveValue | ( |  | ) | const`[inline]`

Objective value of best solution found internally.

Definition at line 122 of file CbcLinked.hpp.

void OsiSolverLink::setBestObjectiveValue | ( | double | value | ) | `[inline]`

Set objective value of best solution found internally.

Definition at line 126 of file CbcLinked.hpp.

const double* OsiSolverLink::bestSolution | ( |  | ) | const`[inline]`

Best solution found internally.

Definition at line 130 of file CbcLinked.hpp.

void OsiSolverLink::setBestSolution | ( | const double * | solution,
|  | int | numberColumns |
| ) |  |  |

Set best solution found internally.

void OsiSolverLink::setSpecialOptions2 | ( | int | value | ) | `[inline]`

Set special options.

Definition at line 136 of file CbcLinked.hpp.

void OsiSolverLink::sayConvex | ( | bool | convex | ) |

Say convex (should work it out) - if convex false then strictly concave.

int OsiSolverLink::specialOptions2 | ( |  | ) | const`[inline]`

Get special options.

Definition at line 142 of file CbcLinked.hpp.

CoinPackedMatrix* OsiSolverLink::cleanMatrix | ( |  | ) | const`[inline]`

Clean copy of matrix So we can add rows.

Definition at line 148 of file CbcLinked.hpp.

CoinPackedMatrix* OsiSolverLink::originalRowCopy | ( |  | ) | const`[inline]`

Row copy of matrix Just genuine columns and rows Linear part.

Definition at line 155 of file CbcLinked.hpp.

ClpSimplex* OsiSolverLink::quadraticModel | ( |  | ) | const`[inline]`

Copy of quadratic model if one.

Definition at line 159 of file CbcLinked.hpp.

CoinPackedMatrix* OsiSolverLink::quadraticRow | ( | int | rowNumber,
|  | double * | linear |
| ) |  |  | const

Gets correct form for a quadratic row - user to delete.

double OsiSolverLink::defaultMeshSize | ( |  | ) | const`[inline]`

Default meshSize.

Definition at line 165 of file CbcLinked.hpp.

void OsiSolverLink::setDefaultMeshSize | ( | double | value | ) | `[inline]`

Definition at line 168 of file CbcLinked.hpp.

double OsiSolverLink::defaultBound | ( |  | ) | const`[inline]`

Default maximumbound.

Definition at line 172 of file CbcLinked.hpp.

void OsiSolverLink::setDefaultBound | ( | double | value | ) | `[inline]`

Definition at line 175 of file CbcLinked.hpp.

void OsiSolverLink::setIntegerPriority | ( | int | value | ) | `[inline]`

Set integer priority.

Definition at line 179 of file CbcLinked.hpp.

int OsiSolverLink::integerPriority | ( |  | ) | const`[inline]`

Get integer priority.

Definition at line 183 of file CbcLinked.hpp.

int OsiSolverLink::objectiveVariable | ( |  | ) | const`[inline]`

Objective transfer variable if one.

Definition at line 187 of file CbcLinked.hpp.

void OsiSolverLink::setBiLinearPriority | ( | int | value | ) | `[inline]`

Set biLinear priority.

Definition at line 191 of file CbcLinked.hpp.

int OsiSolverLink::biLinearPriority | ( |  | ) | const`[inline]`

Get biLinear priority.

Definition at line 195 of file CbcLinked.hpp.

const CoinModel* OsiSolverLink::coinModel | ( |  | ) | const`[inline]`

Return CoinModel.

Definition at line 199 of file CbcLinked.hpp.

void OsiSolverLink::setBiLinearPriorities | ( | int | value,
|  | double | meshSize = `1.0` |
| ) |  |  |

Set all biLinear priorities on x-x variables.

void OsiSolverLink::setBranchingStrategyOnVariables | ( | int | strategyValue,
|  | int | priorityValue = `-1`,
|  | int | mode = `7` |
| ) |  |  |

Set options and priority on all or some biLinear variables 1 - on I-I 2 - on I-x 4 - on x-x or combinations.

-1 means leave (for priority value and strategy value)

void OsiSolverLink::setMeshSizes | ( | double | value | ) |

Set all mesh sizes on x-x variables.

void OsiSolverLink::setFixedPriority | ( | int | priorityValue | ) |

Two tier integer problem where when set of variables with priority less than this are fixed the problem becomes an easier integer problem.

void OsiSolverLink::gutsOfDestructor | ( | bool | justNullify = `false` | ) | `[protected]`

Do real work of initialize.

Do real work of delete

void OsiSolverLink::gutsOfCopy | ( | const OsiSolverLink & | rhs | ) | `[protected]`

Do real work of copy.

## Member Data Documentation

CoinPackedMatrix* OsiSolverLink::matrix_`[protected]`

Clean copy of matrix Marked coefficients will be multiplied by L or U.

Definition at line 241 of file CbcLinked.hpp.

CoinPackedMatrix* OsiSolverLink::originalRowCopy_`[protected]`

Row copy of matrix Just genuine columns and rows.

Definition at line 245 of file CbcLinked.hpp.

ClpSimplex* OsiSolverLink::quadraticModel_`[protected]`

Copy of quadratic model if one.

Definition at line 247 of file CbcLinked.hpp.

int OsiSolverLink::numberNonLinearRows_`[protected]`

Number of rows with nonLinearities.

Definition at line 249 of file CbcLinked.hpp.

int* OsiSolverLink::startNonLinear_`[protected]`

Starts of lists.

Definition at line 251 of file CbcLinked.hpp.

int* OsiSolverLink::rowNonLinear_`[protected]`

Row number for a list.

Definition at line 253 of file CbcLinked.hpp.

int* OsiSolverLink::convex_`[protected]`

Indicator whether is convex, concave or neither -1 concave, 0 neither, +1 convex.

Definition at line 257 of file CbcLinked.hpp.

int* OsiSolverLink::whichNonLinear_`[protected]`

Indices in a list/row.

Definition at line 259 of file CbcLinked.hpp.

CoinModel OsiSolverLink::coinModel_`[protected]`

Model in CoinModel format.

Definition at line 261 of file CbcLinked.hpp.

int OsiSolverLink::numberVariables_`[protected]`

Number of variables in tightening phase.

Definition at line 263 of file CbcLinked.hpp.

OsiLinkedBound* OsiSolverLink::info_`[protected]`

Information.

Definition at line 265 of file CbcLinked.hpp.

int OsiSolverLink::specialOptions2_`[protected]`

0 bit (1) - call fathom (may do mini B&B) 1 bit (2) - quadratic only in objective (add OA cuts) 2 bit (4) - convex 3 bit (8) - try adding OA cuts 4 bit (16) - add linearized constraints

Definition at line 273 of file CbcLinked.hpp.

int OsiSolverLink::objectiveRow_`[protected]`

Objective transfer row if one.

Definition at line 275 of file CbcLinked.hpp.

int OsiSolverLink::objectiveVariable_`[protected]`

Objective transfer variable if one.

Definition at line 277 of file CbcLinked.hpp.

double OsiSolverLink::bestObjectiveValue_`[protected]`

Objective value of best solution found internally.

Definition at line 279 of file CbcLinked.hpp.

double OsiSolverLink::defaultMeshSize_`[protected]`

Default mesh.

Definition at line 281 of file CbcLinked.hpp.

double OsiSolverLink::defaultBound_`[protected]`

Default maximum bound.

Definition at line 283 of file CbcLinked.hpp.

double* OsiSolverLink::bestSolution_`[protected]`

Best solution found internally.

Definition at line 285 of file CbcLinked.hpp.

int OsiSolverLink::integerPriority_`[protected]`

Priority for integers.

Definition at line 287 of file CbcLinked.hpp.

int OsiSolverLink::biLinearPriority_`[protected]`

Priority for bilinear.

Definition at line 289 of file CbcLinked.hpp.

int OsiSolverLink::numberFix_`[protected]`

Number of variables which when fixed help.

Definition at line 291 of file CbcLinked.hpp.

int* OsiSolverLink::fixVariables_`[protected]`

list of fixed variables

Definition at line 293 of file CbcLinked.hpp.

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

- /home/coin/svn-release/Cbc-2.7.8/Cbc/src/CbcLinked.hpp

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