CbcHeuristicDive Class Reference

Dive class. More...

#include <CbcHeuristicDive.hpp>

Inheritance diagram for CbcHeuristicDive:
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List of all members.

Classes

struct  PriorityType
 Array of priorities. More...

Public Member Functions

 CbcHeuristicDive ()
 CbcHeuristicDive (CbcModel &model)
 CbcHeuristicDive (const CbcHeuristicDive &)
 ~CbcHeuristicDive ()
virtual CbcHeuristicDiveclone () const =0
 Clone.
CbcHeuristicDiveoperator= (const CbcHeuristicDive &rhs)
 Assignment operator.
virtual void generateCpp (FILE *)
 Create C++ lines to get to current state.
void generateCpp (FILE *fp, const char *heuristic)
 Create C++ lines to get to current state - does work for base class.
virtual void resetModel (CbcModel *model)
 Resets stuff if model changes.
virtual void setModel (CbcModel *model)
 update model (This is needed if cliques update matrix etc)
virtual int solution (double &objectiveValue, double *newSolution)
 returns 0 if no solution, 1 if valid solution with better objective value than one passed in Sets solution values if good, sets objective value (only if good) This is called after cuts have been added - so can not add cuts This does Fractional Diving
int solution (double &objectiveValue, int &numberNodes, int &numberCuts, OsiRowCut **cuts, CbcSubProblem **&nodes, double *newSolution)
 inner part of dive
int fathom (CbcModel *model, int &numberNodes, CbcSubProblem **&nodes)
 returns 0 if no solution, 1 if valid solution with better objective value than one passed in also returns list of nodes This does Fractional Diving
virtual void validate ()
 Validate model i.e. sets when_ to 0 if necessary (may be NULL).
void setPriorities ()
 Sets priorities if any.
void selectBinaryVariables ()
 Select candidate binary variables for fixing.
void setPercentageToFix (double value)
 Set percentage of integer variables to fix at bounds.
void setMaxIterations (int value)
 Set maximum number of iterations.
void setMaxSimplexIterations (int value)
 Set maximum number of simplex iterations.
int maxSimplexIterations () const
 Get maximum number of simplex iterations.
void setMaxSimplexIterationsAtRoot (int value)
 Set maximum number of simplex iterations at root node.
void setMaxTime (double value)
 Set maximum time allowed.
virtual bool canHeuristicRun ()
 Tests if the heuristic can run.
virtual bool selectVariableToBranch (OsiSolverInterface *solver, const double *newSolution, int &bestColumn, int &bestRound)=0
 Selects the next variable to branch on Returns true if all the fractional variables can be trivially rounded.
virtual void initializeData ()
 Initializes any data which is going to be used repeatedly in selectVariableToBranch.
int reducedCostFix (OsiSolverInterface *solver)
 Perform reduced cost fixing on integer variables.
virtual int fixOtherVariables (OsiSolverInterface *solver, const double *solution, PseudoReducedCost *candidate, const double *random)
 Fix other variables at bounds.

Protected Attributes

CoinPackedMatrix matrix_
CoinPackedMatrix matrixByRow_
unsigned short * downLocks_
unsigned short * upLocks_
double * downArray_
 Extra down array (number Integers long).
double * upArray_
 Extra up array (number Integers long).
PriorityTypepriority_
std::vector< int > binVarIndex_
std::vector< int > vbRowIndex_
double percentageToFix_
double maxTime_
double smallObjective_
int maxIterations_
int maxSimplexIterations_
int maxSimplexIterationsAtRoot_

Detailed Description

Dive class.

Definition at line 21 of file CbcHeuristicDive.hpp.


Constructor & Destructor Documentation

CbcHeuristicDive::CbcHeuristicDive (  ) 
CbcHeuristicDive::CbcHeuristicDive ( CbcModel model  ) 
CbcHeuristicDive::CbcHeuristicDive ( const CbcHeuristicDive  ) 
CbcHeuristicDive::~CbcHeuristicDive (  ) 

Member Function Documentation

virtual CbcHeuristicDive* CbcHeuristicDive::clone (  )  const [pure virtual]
CbcHeuristicDive& CbcHeuristicDive::operator= ( const CbcHeuristicDive rhs  ) 
virtual void CbcHeuristicDive::generateCpp ( FILE *   )  [inline, virtual]

Create C++ lines to get to current state.

Reimplemented from CbcHeuristic.

Reimplemented in CbcHeuristicDiveCoefficient, CbcHeuristicDiveFractional, CbcHeuristicDiveGuided, CbcHeuristicDiveLineSearch, CbcHeuristicDivePseudoCost, and CbcHeuristicDiveVectorLength.

Definition at line 43 of file CbcHeuristicDive.hpp.

void CbcHeuristicDive::generateCpp ( FILE *  fp,
const char *  heuristic 
)

Create C++ lines to get to current state - does work for base class.

Reimplemented from CbcHeuristic.

virtual void CbcHeuristicDive::resetModel ( CbcModel model  )  [virtual]

Resets stuff if model changes.

Implements CbcHeuristic.

virtual void CbcHeuristicDive::setModel ( CbcModel model  )  [virtual]

update model (This is needed if cliques update matrix etc)

Reimplemented from CbcHeuristic.

virtual int CbcHeuristicDive::solution ( double &  objectiveValue,
double *  newSolution 
) [virtual]

returns 0 if no solution, 1 if valid solution with better objective value than one passed in Sets solution values if good, sets objective value (only if good) This is called after cuts have been added - so can not add cuts This does Fractional Diving

Implements CbcHeuristic.

int CbcHeuristicDive::solution ( double &  objectiveValue,
int &  numberNodes,
int &  numberCuts,
OsiRowCut **  cuts,
CbcSubProblem **&  nodes,
double *  newSolution 
)

inner part of dive

int CbcHeuristicDive::fathom ( CbcModel model,
int &  numberNodes,
CbcSubProblem **&  nodes 
)

returns 0 if no solution, 1 if valid solution with better objective value than one passed in also returns list of nodes This does Fractional Diving

virtual void CbcHeuristicDive::validate (  )  [virtual]

Validate model i.e. sets when_ to 0 if necessary (may be NULL).

Reimplemented from CbcHeuristic.

void CbcHeuristicDive::setPriorities (  ) 

Sets priorities if any.

void CbcHeuristicDive::selectBinaryVariables (  ) 

Select candidate binary variables for fixing.

void CbcHeuristicDive::setPercentageToFix ( double  value  )  [inline]

Set percentage of integer variables to fix at bounds.

Definition at line 85 of file CbcHeuristicDive.hpp.

void CbcHeuristicDive::setMaxIterations ( int  value  )  [inline]

Set maximum number of iterations.

Definition at line 90 of file CbcHeuristicDive.hpp.

void CbcHeuristicDive::setMaxSimplexIterations ( int  value  )  [inline]

Set maximum number of simplex iterations.

Definition at line 95 of file CbcHeuristicDive.hpp.

int CbcHeuristicDive::maxSimplexIterations (  )  const [inline]

Get maximum number of simplex iterations.

Definition at line 99 of file CbcHeuristicDive.hpp.

void CbcHeuristicDive::setMaxSimplexIterationsAtRoot ( int  value  )  [inline]

Set maximum number of simplex iterations at root node.

Definition at line 104 of file CbcHeuristicDive.hpp.

void CbcHeuristicDive::setMaxTime ( double  value  )  [inline]

Set maximum time allowed.

Definition at line 109 of file CbcHeuristicDive.hpp.

virtual bool CbcHeuristicDive::canHeuristicRun (  )  [virtual]

Tests if the heuristic can run.

Reimplemented in CbcHeuristicDiveGuided.

virtual bool CbcHeuristicDive::selectVariableToBranch ( OsiSolverInterface solver,
const double *  newSolution,
int &  bestColumn,
int &  bestRound 
) [pure virtual]

Selects the next variable to branch on Returns true if all the fractional variables can be trivially rounded.

Returns false, if there is at least one fractional variable that is not trivially roundable. In this case, the bestColumn returned will not be trivially roundable.

Implemented in CbcHeuristicDiveCoefficient, CbcHeuristicDiveFractional, CbcHeuristicDiveGuided, CbcHeuristicDiveLineSearch, CbcHeuristicDivePseudoCost, and CbcHeuristicDiveVectorLength.

virtual void CbcHeuristicDive::initializeData (  )  [inline, virtual]

Initializes any data which is going to be used repeatedly in selectVariableToBranch.

Reimplemented in CbcHeuristicDivePseudoCost.

Definition at line 128 of file CbcHeuristicDive.hpp.

int CbcHeuristicDive::reducedCostFix ( OsiSolverInterface solver  ) 

Perform reduced cost fixing on integer variables.

virtual int CbcHeuristicDive::fixOtherVariables ( OsiSolverInterface solver,
const double *  solution,
PseudoReducedCost candidate,
const double *  random 
) [virtual]

Fix other variables at bounds.

Reimplemented in CbcHeuristicDivePseudoCost.


Member Data Documentation

Definition at line 142 of file CbcHeuristicDive.hpp.

Definition at line 145 of file CbcHeuristicDive.hpp.

unsigned short* CbcHeuristicDive::downLocks_ [protected]

Definition at line 148 of file CbcHeuristicDive.hpp.

unsigned short* CbcHeuristicDive::upLocks_ [protected]

Definition at line 151 of file CbcHeuristicDive.hpp.

double* CbcHeuristicDive::downArray_ [protected]

Extra down array (number Integers long).

Definition at line 154 of file CbcHeuristicDive.hpp.

double* CbcHeuristicDive::upArray_ [protected]

Extra up array (number Integers long).

Definition at line 157 of file CbcHeuristicDive.hpp.

Definition at line 164 of file CbcHeuristicDive.hpp.

std::vector<int> CbcHeuristicDive::binVarIndex_ [protected]

Definition at line 167 of file CbcHeuristicDive.hpp.

std::vector<int> CbcHeuristicDive::vbRowIndex_ [protected]

Definition at line 170 of file CbcHeuristicDive.hpp.

Definition at line 173 of file CbcHeuristicDive.hpp.

double CbcHeuristicDive::maxTime_ [protected]

Definition at line 176 of file CbcHeuristicDive.hpp.

Definition at line 179 of file CbcHeuristicDive.hpp.

Definition at line 182 of file CbcHeuristicDive.hpp.

Definition at line 185 of file CbcHeuristicDive.hpp.

Definition at line 188 of file CbcHeuristicDive.hpp.


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