11 #ifndef ClpSimplexDual_H
12 #define ClpSimplexDual_H
117 int dual(
int ifValuesPass,
int startFinishOptions = 0);
127 double *newLower,
double *newUpper,
128 double **outputSolution,
129 int *outputStatus,
int *outputIterations,
130 bool stopOnFirstInfeasible =
true,
131 bool alwaysFinish =
false,
132 int startFinishOptions = 0);
167 double &objectiveChange,
195 double accpetablePivot,
201 double acceptablePivot,
202 double &upperReturn,
double &badFree);
211 double acceptablePivot);
220 double acceptablePivot);
235 void dualRow(
int alreadyChosen);
278 int fastDual(
bool alwaysFinish =
false);
292 int startupSolve(
int ifValuesPass,
double *saveDuals,
int startFinishOptions);
294 void gutsOfDual(
int ifValuesPass,
double *&saveDuals,
int initialStatus,
double * ray() const
For advanced users - no need to delete - sign not changed.
int numberAtFakeBound()
Checks number of variables at fake bounds.
int checkUnbounded(CoinIndexedVector *ray, CoinIndexedVector *spare, double changeCost)
Checks if tentative optimal actually means unbounded in dual Returns -3 if not, 2 if is unbounded...
int fastDual(bool alwaysFinish=false)
Fast iterations.
int startupSolve(int ifValuesPass, double *saveDuals, int startFinishOptions)
Startup part of dual (may be extended to other algorithms) returns 0 if good, 1 if bad...
ClpFactorization * setupForStrongBranching(char *arrays, int numberRows, int numberColumns, bool solveLp=false)
This does first part of StrongBranching.
bool changeBound(int iSequence)
As changeBounds but just changes new bounds for a single variable.
double theta() const
Theta (pivot change)
int changeBounds(int initialize, CoinIndexedVector *outputArray, double &changeCost)
Checks if any fake bounds active - if so returns number and modifies updatedDualBound_ and everything...
void gutsOfDual(int ifValuesPass, double *&saveDuals, int initialStatus, ClpDataSave &saveData)
void statusOfProblemInDual(int &lastCleaned, int type, double *givenDjs, ClpDataSave &saveData, int ifValuesPass)
Refactorizes if necessary Checks if finished.
void cleanupAfterStrongBranching(ClpFactorization *factorization)
This cleans up after strong branching.
This just implements CoinFactorization when an ClpMatrixBase object is passed.
void checkPossibleCleanup(CoinIndexedVector *rowArray, CoinIndexedVector *columnArray, double acceptablePivot)
Row array has row part of pivot row Column array has column part.
int pivotResultPart1()
Pivot in a variable and choose an outgoing one.
int numberColumns() const
void dualRow(int alreadyChosen)
Chooses dual pivot row Would be faster with separate region to scan and will have this (with square o...
int strongBranching(int numberVariables, const int *variables, double *newLower, double *newUpper, double **outputSolution, int *outputStatus, int *outputIterations, bool stopOnFirstInfeasible=true, bool alwaysFinish=false, int startFinishOptions=0)
For strong branching.
double dualColumn(CoinIndexedVector *rowArray, CoinIndexedVector *columnArray, CoinIndexedVector *spareArray, CoinIndexedVector *spareArray2, double accpetablePivot, CoinBigIndex *dubiousWeights)
Row array has row part of pivot row Column array has column part.
int perturb()
Perturbs problem (method depends on perturbation()) returns nonzero if should go to dual...
int dual(int ifValuesPass, int startFinishOptions=0)
Dual algorithm.
This solves LPs using the simplex method.
int updateDualsInDual(CoinIndexedVector *rowArray, CoinIndexedVector *columnArray, CoinIndexedVector *outputArray, double theta, double &objectiveChange, bool fullRecompute)
The duals are updated by the given arrays.
void checkPossibleValuesMove(CoinIndexedVector *rowArray, CoinIndexedVector *columnArray, double acceptablePivot)
Row array has row part of pivot row Column array has column part.
void doEasyOnesInValuesPass(double *givenReducedCosts)
This sees if we can move duals in dual values pass.
void finishSolve(int startFinishOptions)
void flipBounds(CoinIndexedVector *rowArray, CoinIndexedVector *columnArray)
While updateDualsInDual sees what effect is of flip this does actual flipping.
This is a tiny class where data can be saved round calls.
CoinIndexedVector * columnArray(int index) const
Useful column length arrays (0,1,2,3,4,5)
int dualColumn0(const CoinIndexedVector *rowArray, const CoinIndexedVector *columnArray, CoinIndexedVector *spareArray, double acceptablePivot, double &upperReturn, double &badFree)
Does first bit of dualColumn.
void originalBound(int iSequence)
Restores bound to original bound.
void resetFakeBounds(int type)
int checkFakeBounds() const
Just checks if any fake bounds active - if so returns number.
int numberRows() const
Number of rows.
void updateDualsInValuesPass(CoinIndexedVector *rowArray, CoinIndexedVector *columnArray, double theta)
The duals are updated by the given arrays.
ClpFactorization * factorization() const
factorization
int nextSuperBasic()
Get next free , -1 if none.
CoinIndexedVector * rowArray(int index) const
Useful row length arrays (0,1,2,3,4,5)
ClpDataSave saveData()
Save data.
This solves LPs using the dual simplex method.
int whileIterating(double *&givenPi, int ifValuesPass)
This has the flow between re-factorizations Broken out for clarity and will be used by strong branchi...