Cbc  2.9.9
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CbcIdiotBranch Class Reference

Define an idiotic idea class. More...

#include <CbcFollowOn.hpp>

+ Inheritance diagram for CbcIdiotBranch:
+ Collaboration diagram for CbcIdiotBranch:

Public Member Functions

 CbcIdiotBranch ()
 
 CbcIdiotBranch (CbcModel *model)
 Useful constructor. More...
 
 CbcIdiotBranch (const CbcIdiotBranch &)
 
virtual CbcObjectclone () const
 Clone. More...
 
CbcIdiotBranchoperator= (const CbcIdiotBranch &rhs)
 
 ~CbcIdiotBranch ()
 
virtual double infeasibility (const OsiBranchingInformation *info, int &preferredWay) const
 Infeasibility - large is 0.5. More...
 
virtual void feasibleRegion ()
 This looks at solution and sets bounds to contain solution. More...
 
virtual CbcBranchingObjectcreateCbcBranch (OsiSolverInterface *solver, const OsiBranchingInformation *info, int way)
 Creates a branching object. More...
 
virtual void initializeForBranching (CbcModel *)
 Initialize for branching. More...
 
- Public Member Functions inherited from CbcObject
 CbcObject ()
 
 CbcObject (CbcModel *model)
 
 CbcObject (const CbcObject &)
 
CbcObjectoperator= (const CbcObject &rhs)
 
virtual ~CbcObject ()
 Destructor. More...
 
virtual double infeasibility (int &) const
 
virtual double feasibleRegion (OsiSolverInterface *solver, const OsiBranchingInformation *info) const
 Dummy one for compatibility. More...
 
virtual double feasibleRegion (OsiSolverInterface *solver) const
 For the variable(s) referenced by the object, look at the current solution and set bounds to match the solution. More...
 
virtual OsiBranchingObjectcreateBranch (OsiSolverInterface *, const OsiBranchingInformation *, int) const
 Create a branching object and indicate which way to branch first. More...
 
virtual OsiBranchingObjectcreateOsiBranch (OsiSolverInterface *solver, const OsiBranchingInformation *info, int way) const
 Create an Osibranching object and indicate which way to branch first. More...
 
virtual OsiSolverBranchsolverBranch () const
 Create an OsiSolverBranch object. More...
 
virtual CbcBranchingObjectpreferredNewFeasible () const
 Given a valid solution (with reduced costs, etc.), return a branching object which would give a new feasible point in a good direction. More...
 
virtual CbcBranchingObjectnotPreferredNewFeasible () const
 Given a valid solution (with reduced costs, etc.), return a branching object which would give a new feasible point in a bad direction. More...
 
virtual void resetBounds (const OsiSolverInterface *)
 Reset variable bounds to their original values. More...
 
virtual void floorCeiling (double &floorValue, double &ceilingValue, double value, double tolerance) const
 Returns floor and ceiling i.e. More...
 
virtual CbcObjectUpdateData createUpdateInformation (const OsiSolverInterface *solver, const CbcNode *node, const CbcBranchingObject *branchingObject)
 Pass in information on branch just done and create CbcObjectUpdateData instance. More...
 
virtual void updateInformation (const CbcObjectUpdateData &)
 Update object by CbcObjectUpdateData. More...
 
int id () const
 Identifier (normally column number in matrix) More...
 
void setId (int value)
 Set identifier (normally column number in matrix) but 1000000000 to 1100000000 means optional branching object i.e. More...
 
bool optionalObject () const
 Return true if optional branching object i.e. More...
 
int position () const
 Get position in object_ list. More...
 
void setPosition (int position)
 Set position in object_ list. More...
 
void setModel (CbcModel *model)
 update model More...
 
CbcModelmodel () const
 Return model. More...
 
int preferredWay () const
 If -1 down always chosen first, +1 up always, 0 normal. More...
 
void setPreferredWay (int value)
 Set -1 down always chosen first, +1 up always, 0 normal. More...
 
virtual void redoSequenceEtc (CbcModel *, int, const int *)
 Redoes data when sequence numbers change. More...
 
- Public Member Functions inherited from OsiObject
 OsiObject ()
 Default Constructor. More...
 
 OsiObject (const OsiObject &)
 Copy constructor. More...
 
OsiObjectoperator= (const OsiObject &rhs)
 Assignment operator. More...
 
virtual ~OsiObject ()
 Destructor. More...
 
double infeasibility (const OsiSolverInterface *solver, int &whichWay) const
 Infeasibility of the object. More...
 
virtual double checkInfeasibility (const OsiBranchingInformation *info) const
 
virtual bool canDoHeuristics () const
 Return true if object can take part in normal heuristics. More...
 
virtual bool canMoveToNearest () const
 Return true if object can take part in move to nearest heuristic. More...
 
virtual int columnNumber () const
 Column number if single column object -1 otherwise, Used by heuristics. More...
 
int priority () const
 Return Priority - note 1 is highest priority. More...
 
void setPriority (int priority)
 Set priority. More...
 
virtual bool boundBranch () const
 Return true if branch should only bound variables. More...
 
virtual bool canHandleShadowPrices () const
 Return true if knows how to deal with Pseudo Shadow Prices. More...
 
int numberWays () const
 Return maximum number of ways branch may have. More...
 
void setNumberWays (int numberWays)
 Set maximum number of ways branch may have. More...
 
void setWhichWay (int way)
 Return preferred way to branch. More...
 
int whichWay () const
 Return current preferred way to branch. More...
 
double infeasibility () const
 Return infeasibility. More...
 
virtual double upEstimate () const
 Return "up" estimate (default 1.0e-5) More...
 
virtual double downEstimate () const
 Return "down" estimate (default 1.0e-5) More...
 
virtual void resetSequenceEtc (int, const int *)
 Change column numbers after preprocessing. More...
 
virtual void updateBefore (const OsiObject *)
 Updates stuff like pseudocosts before threads. More...
 
virtual void updateAfter (const OsiObject *, const OsiObject *)
 Updates stuff like pseudocosts after threads finished. More...
 

Protected Member Functions

OsiRowCut buildCut (const OsiBranchingInformation *info, int type, int &preferredWay) const
 Build "cut". More...
 

Protected Attributes

CoinThreadRandom randomNumberGenerator_
 data Thread specific random number generator More...
 
CoinThreadRandom savedRandomNumberGenerator_
 Saved version of thread specific random number generator. More...
 
- Protected Attributes inherited from CbcObject
CbcModelmodel_
 data More...
 
int id_
 Identifier (normally column number in matrix) More...
 
int position_
 Position in object list. More...
 
int preferredWay_
 If -1 down always chosen first, +1 up always, 0 normal. More...
 
- Protected Attributes inherited from OsiObject
double infeasibility_
 data More...
 
short whichWay_
 Computed preferred way to branch. More...
 
short numberWays_
 Maximum number of ways on branch. More...
 
int priority_
 Priority. More...
 

Detailed Description

Define an idiotic idea class.

The idea of this is that we take some integer variables away from integer and sum them with some randomness to get signed sum close to 0.5. We then can branch to exclude that gap.

This branching rule should be in addition to normal rules and have a high priority.

Definition at line 161 of file CbcFollowOn.hpp.

Constructor & Destructor Documentation

CbcIdiotBranch::CbcIdiotBranch ( )
CbcIdiotBranch::CbcIdiotBranch ( CbcModel model)

Useful constructor.

CbcIdiotBranch::CbcIdiotBranch ( const CbcIdiotBranch )
CbcIdiotBranch::~CbcIdiotBranch ( )

Member Function Documentation

virtual CbcObject* CbcIdiotBranch::clone ( ) const
virtual

Clone.

Implements CbcObject.

CbcIdiotBranch& CbcIdiotBranch::operator= ( const CbcIdiotBranch rhs)
virtual double CbcIdiotBranch::infeasibility ( const OsiBranchingInformation info,
int &  preferredWay 
) const
virtual

Infeasibility - large is 0.5.

Reimplemented from CbcObject.

virtual void CbcIdiotBranch::feasibleRegion ( )
virtual

This looks at solution and sets bounds to contain solution.

Implements CbcObject.

virtual CbcBranchingObject* CbcIdiotBranch::createCbcBranch ( OsiSolverInterface solver,
const OsiBranchingInformation info,
int  way 
)
virtual

Creates a branching object.

Reimplemented from CbcObject.

virtual void CbcIdiotBranch::initializeForBranching ( CbcModel )
virtual

Initialize for branching.

Reimplemented from CbcObject.

OsiRowCut CbcIdiotBranch::buildCut ( const OsiBranchingInformation info,
int  type,
int &  preferredWay 
) const
protected

Build "cut".

Member Data Documentation

CoinThreadRandom CbcIdiotBranch::randomNumberGenerator_
mutableprotected

data Thread specific random number generator

Definition at line 201 of file CbcFollowOn.hpp.

CoinThreadRandom CbcIdiotBranch::savedRandomNumberGenerator_
mutableprotected

Saved version of thread specific random number generator.

Definition at line 203 of file CbcFollowOn.hpp.


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