CbcFollowOn2 Class Reference
Define a follow on class. More...
#include <CbcBranchFollow2.hpp>
Public Member Functions | |
| CbcFollowOn2 () | |
| CbcFollowOn2 (CbcModel *model) | |
| Useful constructor. | |
| CbcFollowOn2 (const CbcFollowOn2 &) | |
| virtual CbcObject * | clone () const |
| Clone. | |
| CbcFollowOn2 & | operator= (const CbcFollowOn2 &rhs) |
| Assignment operator. | |
| ~CbcFollowOn2 () | |
| virtual double | infeasibility (int &preferredWay) const |
| Infeasibility - large is 0.5. | |
| virtual void | feasibleRegion () |
| This looks at solution and sets bounds to contain solution. | |
| virtual CbcBranchingObject * | createBranch (int way) |
| Creates a branching object. | |
| virtual int | gutsOfFollowOn2 (int &otherRow, int &preferredWay, int &effectiveRhs) const |
| As some computation is needed in more than one place - returns row. | |
| int | maximumRhs () const |
| get and set for maximum rhws (affects cuts as branch) | |
| void | setMaximumRhs (int value) |
Protected Attributes | |
| CoinPackedMatrix | matrix_ |
| data Matrix | |
| CoinPackedMatrix | matrixByRow_ |
| Matrix by row. | |
| int * | rhs_ |
| Possible rhs (if 0 then not possible). | |
| int | maximumRhs_ |
| If >1 then allow cuts if effective rhs <= this. | |
Detailed Description
Define a follow on class.
The idea of this is that in air-crew scheduling problems crew may fly in on flight A and out on flight B or on some other flight. A useful branch is one which on one side fixes all which go out on flight B to 0, while the other branch fixes all those that do NOT go out on flight B to 0.
This tries to generalize so that cuts are produced with sum aij xj <= bi on each side. It should be intelligent enough to fix if things can be fixed. We also need to make sure branch cuts work properly (i.e. persistence).
This branching rule should be in addition to normal rules and have a high priority.
Definition at line 23 of file CbcBranchFollow2.hpp.
Constructor & Destructor Documentation
| CbcFollowOn2::CbcFollowOn2 | ( | ) |
| CbcFollowOn2::CbcFollowOn2 | ( | CbcModel * | model | ) |
Useful constructor.
| CbcFollowOn2::CbcFollowOn2 | ( | const CbcFollowOn2 & | ) |
| CbcFollowOn2::~CbcFollowOn2 | ( | ) |
Member Function Documentation
| CbcFollowOn2& CbcFollowOn2::operator= | ( | const CbcFollowOn2 & | rhs | ) |
Assignment operator.
Reimplemented from CbcObject.
| virtual double CbcFollowOn2::infeasibility | ( | int & | preferredWay | ) | const [virtual] |
Infeasibility - large is 0.5.
Implements CbcObject.
| virtual void CbcFollowOn2::feasibleRegion | ( | ) | [virtual] |
This looks at solution and sets bounds to contain solution.
Implements CbcObject.
| virtual CbcBranchingObject* CbcFollowOn2::createBranch | ( | int | way | ) | [virtual] |
Creates a branching object.
Implements CbcObject.
| virtual int CbcFollowOn2::gutsOfFollowOn2 | ( | int & | otherRow, | |
| int & | preferredWay, | |||
| int & | effectiveRhs | |||
| ) | const [virtual] |
As some computation is needed in more than one place - returns row.
Also returns other row and effective rhs (so we can know if cut)
| int CbcFollowOn2::maximumRhs | ( | ) | const [inline] |
get and set for maximum rhws (affects cuts as branch)
Definition at line 60 of file CbcBranchFollow2.hpp.
| void CbcFollowOn2::setMaximumRhs | ( | int | value | ) | [inline] |
Definition at line 62 of file CbcBranchFollow2.hpp.
Member Data Documentation
CoinPackedMatrix CbcFollowOn2::matrix_ [protected] |
data Matrix
Definition at line 67 of file CbcBranchFollow2.hpp.
CoinPackedMatrix CbcFollowOn2::matrixByRow_ [protected] |
Matrix by row.
Definition at line 69 of file CbcBranchFollow2.hpp.
int* CbcFollowOn2::rhs_ [protected] |
Possible rhs (if 0 then not possible).
Definition at line 71 of file CbcBranchFollow2.hpp.
int CbcFollowOn2::maximumRhs_ [protected] |
If >1 then allow cuts if effective rhs <= this.
Definition at line 73 of file CbcBranchFollow2.hpp.
The documentation for this class was generated from the following file:
- /home/coin/svn-release/OptimizationSuite-1.1.0/Cbc/examples/CbcBranchFollow2.hpp
