Detailed Description

public methods for LP rows

Functions
	SCIP_DECL_SORTPTRCOMP (SCIProwComp)

void	SCIProwLock (SCIP_ROW *row)

void	SCIProwUnlock (SCIP_ROW *row)

SCIP_Real	SCIProwGetScalarProduct (SCIP_ROW row1, SCIP_ROW row2)

SCIP_Real	SCIProwGetParallelism (SCIP_ROW row1, SCIP_ROW row2, char orthofunc)

SCIP_Real	SCIProwGetOrthogonality (SCIP_ROW row1, SCIP_ROW row2, char orthofunc)

void	SCIProwSort (SCIP_ROW *row)

int	SCIProwGetNNonz (SCIP_ROW *row)

int	SCIProwGetNLPNonz (SCIP_ROW *row)

SCIP_COL **	SCIProwGetCols (SCIP_ROW *row)

SCIP_Real *	SCIProwGetVals (SCIP_ROW *row)

SCIP_Real	SCIProwGetConstant (SCIP_ROW *row)

SCIP_Real	SCIProwGetNorm (SCIP_ROW *row)

SCIP_Real	SCIProwGetSumNorm (SCIP_ROW *row)

SCIP_Real	SCIProwGetLhs (SCIP_ROW *row)

SCIP_Real	SCIProwGetRhs (SCIP_ROW *row)

SCIP_Real	SCIProwGetDualsol (SCIP_ROW *row)

SCIP_Real	SCIProwGetDualfarkas (SCIP_ROW *row)

SCIP_BASESTAT	SCIProwGetBasisStatus (SCIP_ROW *row)

const char *	SCIProwGetName (SCIP_ROW *row)

int	SCIProwGetIndex (SCIP_ROW *row)

int	SCIProwGetAge (SCIP_ROW *row)

int	SCIProwGetRank (SCIP_ROW *row)

SCIP_Bool	SCIProwIsIntegral (SCIP_ROW *row)

SCIP_Bool	SCIProwIsLocal (SCIP_ROW *row)

SCIP_Bool	SCIProwIsModifiable (SCIP_ROW *row)

SCIP_Bool	SCIProwIsRemovable (SCIP_ROW *row)

SCIP_ROWORIGINTYPE	SCIProwGetOrigintype (SCIP_ROW *row)

SCIP_CONSHDLR *	SCIProwGetOriginConshdlr (SCIP_ROW *row)

SCIP_CONS *	SCIProwGetOriginCons (SCIP_ROW *row)

SCIP_SEPA *	SCIProwGetOriginSepa (SCIP_ROW *row)

SCIP_Bool	SCIProwIsInGlobalCutpool (SCIP_ROW *row)

int	SCIProwGetLPPos (SCIP_ROW *row)

int	SCIProwGetLPDepth (SCIP_ROW *row)

SCIP_Bool	SCIProwIsInLP (SCIP_ROW *row)

SCIP_Longint	SCIProwGetActiveLPCount (SCIP_ROW *row)

SCIP_Longint	SCIProwGetNLPsAfterCreation (SCIP_ROW *row)

void	SCIProwChgRank (SCIP_ROW *row, int rank)

SCIP_RETCODE	SCIPcreateRowConshdlr (SCIP scip, SCIP_ROW row, SCIP_CONSHDLR conshdlr, const char name, int len, SCIP_COL cols, SCIP_Real vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcreateRowCons (SCIP scip, SCIP_ROW row, SCIP_CONS cons, const char name, int len, SCIP_COL cols, SCIP_Real vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcreateRowSepa (SCIP scip, SCIP_ROW row, SCIP_SEPA sepa, const char name, int len, SCIP_COL cols, SCIP_Real vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcreateRowUnspec (SCIP scip, SCIP_ROW row, const char name, int len, SCIP_COL *cols, SCIP_Real vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcreateRow (SCIP scip, SCIP_ROW row, const char name, int len, SCIP_COL *cols, SCIP_Real vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcreateEmptyRowConshdlr (SCIP scip, SCIP_ROW row, SCIP_CONSHDLR conshdlr, const char *name, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcreateEmptyRowCons (SCIP scip, SCIP_ROW row, SCIP_CONS cons, const char *name, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcreateEmptyRowSepa (SCIP scip, SCIP_ROW row, SCIP_SEPA sepa, const char *name, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcreateEmptyRowUnspec (SCIP scip, SCIP_ROW row, const char name, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcreateEmptyRow (SCIP scip, SCIP_ROW row, const char name, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool removable)

SCIP_RETCODE	SCIPcaptureRow (SCIP scip, SCIP_ROW row)

SCIP_RETCODE	SCIPreleaseRow (SCIP scip, SCIP_ROW *row)

SCIP_RETCODE	SCIPchgRowLhs (SCIP scip, SCIP_ROW row, SCIP_Real lhs)

SCIP_RETCODE	SCIPchgRowRhs (SCIP scip, SCIP_ROW row, SCIP_Real rhs)

SCIP_RETCODE	SCIPcacheRowExtensions (SCIP scip, SCIP_ROW row)

SCIP_RETCODE	SCIPflushRowExtensions (SCIP scip, SCIP_ROW row)

SCIP_RETCODE	SCIPaddVarToRow (SCIP scip, SCIP_ROW row, SCIP_VAR *var, SCIP_Real val)

SCIP_RETCODE	SCIPaddVarsToRow (SCIP scip, SCIP_ROW row, int nvars, SCIP_VAR *vars, SCIP_Real vals)

SCIP_RETCODE	SCIPaddVarsToRowSameCoef (SCIP scip, SCIP_ROW row, int nvars, SCIP_VAR **vars, SCIP_Real val)

SCIP_RETCODE	SCIPcalcRowIntegralScalar (SCIP scip, SCIP_ROW row, SCIP_Real mindelta, SCIP_Real maxdelta, SCIP_Longint maxdnom, SCIP_Real maxscale, SCIP_Bool usecontvars, SCIP_Real intscalar, SCIP_Bool success)

SCIP_RETCODE	SCIPmakeRowIntegral (SCIP scip, SCIP_ROW row, SCIP_Real mindelta, SCIP_Real maxdelta, SCIP_Longint maxdnom, SCIP_Real maxscale, SCIP_Bool usecontvars, SCIP_Bool *success)

void	SCIPmarkRowNotRemovableLocal (SCIP scip, SCIP_ROW row)

int	SCIPgetRowNumIntCols (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowMinCoef (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowMaxCoef (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowMinActivity (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowMaxActivity (SCIP scip, SCIP_ROW row)

SCIP_RETCODE	SCIPrecalcRowLPActivity (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowLPActivity (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowLPFeasibility (SCIP scip, SCIP_ROW row)

SCIP_RETCODE	SCIPrecalcRowPseudoActivity (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowPseudoActivity (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowPseudoFeasibility (SCIP scip, SCIP_ROW row)

SCIP_RETCODE	SCIPrecalcRowActivity (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowActivity (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowFeasibility (SCIP scip, SCIP_ROW row)

SCIP_Real	SCIPgetRowSolActivity (SCIP scip, SCIP_ROW row, SCIP_SOL *sol)

SCIP_Real	SCIPgetRowSolFeasibility (SCIP scip, SCIP_ROW row, SCIP_SOL *sol)

SCIP_Real	SCIPgetRowObjParallelism (SCIP scip, SCIP_ROW row)

SCIP_RETCODE	SCIPprintRow (SCIP scip, SCIP_ROW row, FILE *file)

Function Documentation

◆ SCIP_DECL_SORTPTRCOMP()

SCIP_DECL_SORTPTRCOMP ( SCIProwComp )

comparison method for sorting rows by non-decreasing index

Definition at line 950 of file lp.c.

References NULL, and SCIProwGetIndex().

◆ SCIProwLock()

void SCIProwLock ( SCIP_ROW * row )

locks an unmodifiable row, which forbids further changes; has no effect on modifiable rows

Parameters

row LP row

Definition at line 5378 of file lp.c.

References SCIP_Row::modifiable, SCIP_Row::name, SCIP_Row::nlocks, NULL, SCIP_Row::nuses, and SCIPdebugMessage.

Referenced by SCIPcutpoolAddNewRow(), and SCIPlpAddRow().

◆ SCIProwUnlock()

void SCIProwUnlock ( SCIP_ROW * row )

unlocks a lock of an unmodifiable row; a row with no sealed lock may be modified; has no effect on modifiable rows

Parameters

row LP row

Definition at line 5393 of file lp.c.

References SCIP_Row::modifiable, SCIP_Row::name, SCIP_Row::nlocks, NULL, SCIP_Row::nuses, and SCIPdebugMessage.

Referenced by cutpoolDelCut(), lpDelRowset(), SCIPcutpoolClear(), and SCIPlpShrinkRows().

◆ SCIProwGetScalarProduct()

SCIP_Real SCIProwGetScalarProduct	(	SCIP_ROW *	row1,
		SCIP_ROW *	row2
	)

returns the scalar product of the coefficient vectors of the two given rows

Note: the scalar product is computed w.r.t. the current LP columns only

Parameters

row1	first LP row
row2	second LP row

Definition at line 7008 of file lp.c.

References SCIP_Row::cols, SCIP_Row::cols_index, FALSE, SCIP_Col::index, SCIP_Row::len, SCIP_Row::lpcolssorted, SCIP_Col::lppos, MAX, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, NULL, SCIP_Row::nunlinked, SCIP_Bool, SCIP_Real, SCIProwSort(), SCIPswapPointers(), TRUE, and SCIP_Row::vals.

Referenced by SCIProwGetParallelism().

◆ SCIProwGetParallelism()

SCIP_Real SCIProwGetParallelism	(	SCIP_ROW *	row1,
		SCIP_ROW *	row2,
		char	orthofunc
	)

returns the degree of parallelism between the hyperplanes defined by the two row vectors v, w: p = |v*w|/(|v|*|w|); the hyperplanes are parallel, iff p = 1, they are orthogonal, iff p = 0

Parameters

row1	first LP row
row2	second LP row
orthofunc	function used for calc. scalar prod. ('e'uclidean, 'd'iscrete)

Definition at line 7724 of file lp.c.

References SCIP_Row::cols, SCIP_Row::len, SCIP_Col::lppos, REALABS, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetDiscreteScalarProduct(), SCIProwGetNNonz(), SCIProwGetNorm(), SCIProwGetScalarProduct(), SQR, SCIP_Row::sqrnorm, and SCIP_Row::vals.

Referenced by aggregation(), computeProjectionScore(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), filterWithDynamicParallelism(), filterWithParallelism(), penaliseWithParallelism(), and SCIProwGetOrthogonality().

◆ SCIProwGetOrthogonality()

SCIP_Real SCIProwGetOrthogonality	(	SCIP_ROW *	row1,
		SCIP_ROW *	row2,
		char	orthofunc
	)

returns the degree of orthogonality between the hyperplanes defined by the two row vectors v, w: o = 1 - |v*w|/(|v|*|w|); the hyperplanes are orthogonal, iff p = 1, they are parallel, iff p = 0

Parameters

row1	first LP row
row2	second LP row
orthofunc	function used for calc. scalar prod. ('e'uclidean, 'd'iscrete)

Definition at line 7788 of file lp.c.

References SCIProwGetParallelism().

◆ SCIProwSort()

void SCIProwSort ( SCIP_ROW * row )

sorts row entries such that LP columns precede non-LP columns and inside both parts lower column indices precede higher ones

Parameters

row	row to be sorted

Definition at line 6016 of file lp.c.

References SCIP_Row::cols, SCIP_Row::delaysort, SCIP_Col::index, SCIP_Row::nlpcols, NULL, rowSortLP(), and rowSortNonLP().

Referenced by rowMerge(), SCIP_DECL_HASHKEYEQ(), SCIProwGetDiscreteScalarProduct(), and SCIProwGetScalarProduct().

◆ SCIProwGetNNonz()

int SCIProwGetNNonz ( SCIP_ROW * row )

get number of nonzero entries in row vector

Parameters

row LP row

Definition at line 17213 of file lp.c.

References SCIP_Row::len, and NULL.

Referenced by addAltLPRow(), addCut(), addCuts(), addOrigRow(), aggregateGeneratedCuts(), applyRepair(), buildMod2Matrix(), computeRltCut(), constructCutRow(), copyCuts(), createLPWithHardCuts(), createProjRow(), createRows(), detectHiddenProducts(), detectProductsUnconditional(), evaluateCutNumerics(), fillRelationTables(), filterWithDensity(), generateAverageNBRay(), generateDisjCutSOS1(), isAcceptableRow(), mod2MatrixAddOrigRow(), mod2MatrixTransformContRows(), rowCalculateGauss(), rowFindSlackVar(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_HEUREXEC(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPaddRow(), SCIPaddVarsToRow(), SCIPaddVarsToRowSameCoef(), SCIPapplyLockFixings(), SCIPcutpoolSeparate(), SCIPnlrowCreateFromRow(), SCIProwGetParallelism(), SCIPselectCutsEnsemble(), SCIPsepastoreAddCut(), SCIPsepastoreApplyCuts(), SCIPsepastoreIsCutApplicable(), scoring(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), storeSuitableRows(), and updateObjectiveVector().

◆ SCIProwGetNLPNonz()

int SCIProwGetNLPNonz ( SCIP_ROW * row )

get number of nonzero entries in row vector, that correspond to columns currently in the SCIP_LP;

Warning: This method is only applicable on rows, that are completely linked to their columns (e.g. a row that is in the current LP and the LP was solved, or a row that was in a solved LP and didn't change afterwards

Parameters

row LP row

Definition at line 17227 of file lp.c.

References SCIP_Row::nlpcols, NULL, and SCIP_Row::nunlinked.

Referenced by addFlowrowToCommodity(), addRowToCut(), cleanupNetwork(), collectIncidentFlowCols(), computeCut(), createCGMIPprimalsols(), createLPWithHardCuts(), createSubscip(), deleteCommodity(), extractCapacities(), extractCapacityRows(), extractFlowRows(), extractNodes(), findUncapacitatedArcs(), generateClusterCuts(), getFlowrowFit(), getGMIFromRow(), getNodeSimilarityScore(), getRowFracActivity(), identifySourcesTargets(), initMatrix(), mcfnetworkFill(), mod2MatrixTransformContRows(), nodepairqueueCreate(), selectRounding(), selectShifting(), separateCuts(), and storeCuts().

◆ SCIProwGetCols()

SCIP_COL ** SCIProwGetCols ( SCIP_ROW * row )

gets array with columns of nonzero entries

Parameters

row LP row

Definition at line 17238 of file lp.c.

References SCIP_Row::cols, and NULL.

Referenced by addAltLPRow(), addFlowrowToCommodity(), addOrigRow(), addRowToCut(), aggregateGeneratedCuts(), applyRepair(), cleanupNetwork(), collectIncidentFlowCols(), computeCut(), computeRltCut(), copyCuts(), createCGMIPprimalsols(), createLPWithHardCuts(), createProjRow(), createRows(), deleteCommodity(), detectHiddenProducts(), detectProductsUnconditional(), extractCapacities(), extractCapacityRows(), extractFlowRows(), extractNodes(), fillRelationTables(), findUncapacitatedArcs(), generateAverageNBRay(), generateClusterCuts(), generateDisjCutSOS1(), getFlowrowFit(), getGMIFromRow(), getNodeSimilarityScore(), getRowFracActivity(), identifySourcesTargets(), initMatrix(), isAcceptableRow(), mcfnetworkFill(), mod2MatrixAddOrigRow(), mod2MatrixTransformContRows(), nodepairqueueCreate(), rowCalculateGauss(), rowFindSlackVar(), SCIP_DECL_HEUREXEC(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPapplyLockFixings(), SCIPnlrowCreateFromRow(), scoring(), selectRounding(), selectShifting(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), storeCuts(), storeSuitableRows(), and updateObjectiveVector().

◆ SCIProwGetVals()

SCIP_Real * SCIProwGetVals ( SCIP_ROW * row )

gets array with coefficients of nonzero entries

Parameters

row LP row

Definition at line 17248 of file lp.c.

References NULL, and SCIP_Row::vals.

Referenced by addAltLPRow(), addFlowrowToCommodity(), addOrigRow(), addRowToCut(), aggregateGeneratedCuts(), applyRepair(), computeCut(), computeRltCut(), copyCuts(), createCGMIPprimalsols(), createLPWithHardCuts(), createProjRow(), createRows(), detectHiddenProducts(), detectProductsUnconditional(), extractCapacityRows(), extractFlowRows(), extractNodes(), generateAverageNBRay(), generateClusterCuts(), generateDisjCutSOS1(), getFlowrowFit(), getGMIFromRow(), getNodeSimilarityScore(), getRowFracActivity(), initMatrix(), mcfnetworkFill(), mod2MatrixAddOrigRow(), mod2MatrixTransformContRows(), rowCalculateGauss(), rowFindSlackVar(), SCIP_DECL_HEUREXEC(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPapplyLockFixings(), SCIPnlrowCreateFromRow(), scoring(), selectRounding(), selectShifting(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), storeCuts(), and updateObjectiveVector().

◆ SCIProwGetConstant()

SCIP_Real SCIProwGetConstant ( SCIP_ROW * row )

gets constant shift of row

Parameters

row LP row

Definition at line 17258 of file lp.c.

References SCIP_Row::constant, and NULL.

Referenced by addAltLPRow(), addFlowrowToCommodity(), addOrigRow(), addRowToCut(), addSideRemoval(), aggregateGeneratedCuts(), applyRepair(), buildMod2Matrix(), computeCut(), computeRltCut(), copyCuts(), createLPWithHardCuts(), createProjRow(), createRows(), createSubscip(), detectHiddenProducts(), detectProductsUnconditional(), extractCapacityRows(), extractFlowRows(), generateClusterCuts(), generateDisjCutSOS1(), getGMIFromRow(), initMatrix(), mod2MatrixTransformContRows(), nodepairqueueCreate(), rowCalculateGauss(), SCIP_DECL_HEUREXEC(), SCIPaddNlpiProblemRows(), SCIPnlrowCreateFromRow(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), storeCuts(), updateLagrangianValue(), and updateSubgradient().

◆ SCIProwGetNorm()

SCIP_Real SCIProwGetNorm ( SCIP_ROW * row )

gets Euclidean norm of row vector

Parameters

row LP row

Definition at line 17268 of file lp.c.

References checkRowSqrnorm, NULL, and SCIP_Row::sqrnorm.

Referenced by addCut(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), getNActiveConsScore(), SCIP_DECL_SEPAEXECLP(), SCIProwGetLPEfficacy(), SCIProwGetNLPEfficacy(), SCIProwGetParallelism(), SCIProwGetRelaxEfficacy(), SCIProwGetSolEfficacy(), scoring(), and separateCuts().

◆ SCIProwGetSumNorm()

SCIP_Real SCIProwGetSumNorm ( SCIP_ROW * row )

gets sum norm of row vector (sum of absolute values of coefficients)

Parameters

row LP row

Definition at line 17280 of file lp.c.

References checkRowSumnorm, NULL, and SCIP_Row::sumnorm.

Referenced by SCIProwGetLPEfficacy(), SCIProwGetNLPEfficacy(), SCIProwGetRelaxEfficacy(), and SCIProwGetSolEfficacy().

◆ SCIProwGetLhs()

SCIP_Real SCIProwGetLhs ( SCIP_ROW * row )

returns the left hand side of the row

Parameters

row LP row

Definition at line 17292 of file lp.c.

References SCIP_Row::lhs, and NULL.

Referenced by addAltLPRow(), addCut(), addFlowrowToCommodity(), addOneRow(), addOrigRow(), addRowToCut(), addSideRemoval(), aggregateGeneratedCuts(), aggregateNextRow(), aggregation(), applyRepair(), buildMod2Matrix(), calcShiftVal(), computeCut(), computeNogoodCut(), computeRltCut(), computeStandardIntegerOptCut(), computeStandardLPFeasibilityCut(), computeStandardLPOptimalityCut(), constructCutRow(), copyCuts(), createCGMIPprimalsols(), createLPWithHardCuts(), createProjRow(), createRows(), createSubscip(), detectHiddenProducts(), detectProductsUnconditional(), determineBound(), extractCapacityRows(), extractFlowRows(), generateAndApplyBendersIntegerCuts(), generateClusterCuts(), generateDisjCutSOS1(), getGMIFromRow(), getNActiveConsScore(), getSimplexCoefficients(), handleNewVariableSOS2(), initMatrix(), initsepaBoundInequalityFromCardinality(), invertCommodity(), mod2MatrixTransformContRows(), nodepairqueueCreate(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_HEUREXEC(), SCIP_DECL_NLHDLRINITSEPA(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPapplyLockFixings(), SCIPgenerateAndApplyBendersOptCut(), SCIPlpGetDualDegeneracy(), SCIPlpRemoveRedundantRows(), SCIPnlrowCreateFromRow(), SCIProwCalcProbability(), SCIPrunBoundHeuristic(), SCIPsepastoreAddCut(), SCIPsolAdjustImplicitSolVals(), scoring(), selectShifting(), separateCuts(), separateRltCuts(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), sepastoreIsCutRedundant(), sepastoreIsCutRedundantOrInfeasible(), setupAggregationData(), shiftValues(), storeCuts(), storeSuitableRows(), updateLagrangianValue(), updateObjectiveVector(), updateSlacks(), updateSubgradient(), and updateViolations().

◆ SCIProwGetRhs()

SCIP_Real SCIProwGetRhs ( SCIP_ROW * row )

returns the right hand side of the row

Parameters

row LP row

Definition at line 17302 of file lp.c.

References NULL, and SCIP_Row::rhs.

Referenced by addAltLPRow(), addCut(), addCuts(), addFlowrowToCommodity(), addOneRow(), addOrigRow(), addRowToCut(), addSideRemoval(), aggregateGeneratedCuts(), aggregateNextRow(), aggregation(), applyRepair(), buildMod2Matrix(), calcShiftVal(), computeCut(), computeRltCut(), computeStandardLPFeasibilityCut(), computeStandardLPOptimalityCut(), constructCutRow(), copyCuts(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createCGMIPprimalsols(), createLPWithHardCuts(), createProjRow(), createRows(), createSubscip(), detectHiddenProducts(), detectProductsUnconditional(), determineBound(), evaluateCutNumerics(), extractCapacityRows(), extractFlowRows(), generateClusterCuts(), generateDisjCutSOS1(), generateOddCycleCut(), getGMIFromRow(), getNActiveConsScore(), getSimplexCoefficients(), handleNewVariableSOS2(), initMatrix(), initsepaBoundInequalityFromCardinality(), invertCommodity(), mod2MatrixTransformContRows(), nodepairqueueCreate(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_HEUREXEC(), SCIP_DECL_NLHDLRINITSEPA(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPapplyLockFixings(), SCIPlpGetDualDegeneracy(), SCIPlpRemoveRedundantRows(), SCIPnlrowCreateFromRow(), SCIProwCalcProbability(), SCIPrunBoundHeuristic(), SCIPsepastoreAddCut(), SCIPsolAdjustImplicitSolVals(), scoring(), selectShifting(), separateCuts(), separateRltCuts(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), sepastoreIsCutRedundant(), sepastoreIsCutRedundantOrInfeasible(), setupAggregationData(), shiftValues(), storeCuts(), storeSuitableRows(), updateLagrangianValue(), updateObjectiveVector(), updateSlacks(), updateSubgradient(), and updateViolations().

◆ SCIProwGetDualsol()

SCIP_Real SCIProwGetDualsol ( SCIP_ROW * row )

gets the dual LP solution of a row

Parameters

row LP row

Definition at line 17312 of file lp.c.

References SCIP_Row::dualsol, SCIP_Row::lppos, and NULL.

Referenced by addFlowrowToCommodity(), computeStandardLPOptimalityCut(), createGenVBound(), createRows(), extractCapacityRows(), extractFlowRows(), generateAverageNBRay(), generateAverageRay(), generateClusterCuts(), getDualBranchscore(), getNActiveConsScore(), nodepairqueueCreate(), SCIP_DECL_BRANCHEXECLP(), SCIPgetDualsolKnapsack(), SCIPgetDualsolLinear(), SCIPgetDualsolLogicor(), SCIPgetDualsolSetppc(), SCIPgetDualsolVarbound(), SCIPlpGetDualDegeneracy(), separateCons(), separateCuts(), and solveBilinearLP().

◆ SCIProwGetDualfarkas()

SCIP_Real SCIProwGetDualfarkas ( SCIP_ROW * row )

gets the dual Farkas coefficient of a row in an infeasible LP

Parameters

row LP row

Definition at line 17325 of file lp.c.

References SCIP_Row::dualfarkas, SCIP_Row::lppos, and NULL.

Referenced by computeStandardLPFeasibilityCut(), SCIPgetDualfarkasKnapsack(), SCIPgetDualfarkasLinear(), SCIPgetDualfarkasLogicor(), SCIPgetDualfarkasSetppc(), and SCIPgetDualfarkasVarbound().

◆ SCIProwGetBasisStatus()

SCIP_BASESTAT SCIProwGetBasisStatus ( SCIP_ROW * row )

gets the basis status of a row in the LP solution; only valid for LPs with status SCIP_LPSOLSTAT_OPTIMAL and with SCIPisLPSolBasic(scip) == TRUE; returns SCIP_BASESTAT_BASIC for rows not in the current SCIP_LP

Parameters

row LP row

Definition at line 17340 of file lp.c.

References SCIP_Row::basisstatus, SCIP_Row::lppos, NULL, and SCIP_BASESTAT_BASIC.

Referenced by addOneRow(), addRows(), addRowToCut(), computeIntercut(), computeNegCutcoefs(), computeStrengthenedIntercut(), createAndStoreSparseRays(), createCGMIPprimalsols(), generateDisjCutSOS1(), getGMIFromRow(), getSimplexCoefficients(), SCIP_DECL_SEPAEXECLP(), SCIPlpGetDualDegeneracy(), and storeDenseTableauRow().

◆ SCIProwGetName()

const char * SCIProwGetName ( SCIP_ROW * row )

returns the name of the row

Parameters

row LP row

Definition at line 17351 of file lp.c.

References SCIP_Row::name, and NULL.

Referenced by addFlowrowToCommodity(), addRowToAggrRow(), aggregateGeneratedCuts(), aggregation(), applyRepair(), calcBranchScore(), calcShiftVal(), checkDualFeasibility(), computeCut(), computeProjectionScore(), computeRltCut(), constructCutRow(), copyCuts(), createProjRow(), createRows(), createSubscip(), deleteCommodity(), determineBound(), extractCapacities(), extractCapacityRows(), extractFlow(), extractFlowRows(), extractNodes(), fillRelationTables(), findUncapacitatedArcs(), generateClusterCuts(), getDualBranchscore(), getFlowrowFit(), getNodeSimilarityScore(), nodepairqueueCreate(), relaxVar(), rowCalculateGauss(), rowFindSlackVar(), SCIP_DECL_HEUREXEC(), SCIP_DECL_SEPAEXECLP(), SCIPaddNlpiProblemRows(), SCIPaddRowIndicator(), SCIPapplyLockFixings(), SCIPcutpoolAddNewRow(), SCIPcutpoolDelRow(), SCIPcutpoolSeparate(), SCIPlpGetDualfarkas(), SCIPlpRemoveRedundantRows(), SCIPnlrowCreateFromRow(), SCIProwCalcIntegralScalar(), SCIProwCalcProbability(), SCIPrunBoundHeuristic(), SCIPselectCutsDynamic(), SCIPsepastoreAddCut(), SCIPsepastoreApplyCuts(), separateCuts(), separateRltCuts(), sepastoreIsCutRedundant(), and sepastoreIsCutRedundantOrInfeasible().

◆ SCIProwGetIndex()

int SCIProwGetIndex ( SCIP_ROW * row )

gets unique index of row

Parameters

row LP row

Definition at line 17361 of file lp.c.

References SCIP_Row::index, and NULL.

Referenced by calcBranchScore(), checkConstraintMatching(), determineBound(), markRowsXj(), SCIP_DECL_SORTPTRCOMP(), separateRltCuts(), storeSuitableRows(), varColCompare(), and varProcessBoundChanges().

◆ SCIProwGetAge()

int SCIProwGetAge ( SCIP_ROW * row )

gets age of row

Parameters

row LP row

Definition at line 17371 of file lp.c.

References SCIP_Row::age, and NULL.

Referenced by createSubscip(), and storeCuts().

◆ SCIProwGetRank()

int SCIProwGetRank ( SCIP_ROW * row )

gets rank of row

Parameters

row LP row

Definition at line 17381 of file lp.c.

References NULL, and SCIP_Row::rank.

Referenced by addCut(), addOrigRow(), aggregateGeneratedCuts(), computeCut(), createCGCutCMIR(), createCGCutStrongCG(), evaluateCutNumerics(), getVarRank(), mod2MatrixTransformContRows(), and SCIPapplyLockFixings().

◆ SCIProwIsIntegral()

SCIP_Bool SCIProwIsIntegral ( SCIP_ROW * row )

returns TRUE iff the activity of the row (without the row's constant) is always integral in a feasible solution

Parameters

row LP row

Definition at line 17391 of file lp.c.

References SCIP_Row::integral, and NULL.

Referenced by buildMod2Matrix(), computeCut(), computeMonoidalStrengthCoef(), createCGMIPprimalsols(), createSubscip(), generateGMICuts(), getGMIFromRow(), mod2MatrixTransformContRows(), and SCIP_DECL_SEPAEXECLP().

◆ SCIProwIsLocal()

SCIP_Bool SCIProwIsLocal ( SCIP_ROW * row )

returns TRUE iff row is only valid locally

Parameters

row LP row

Definition at line 17401 of file lp.c.

References SCIP_Row::local, and NULL.

Referenced by addAltLPRow(), addCuts(), addFracCounter(), addOneRow(), addOrigRow(), aggregateGeneratedCuts(), buildMod2Matrix(), calcShiftVal(), computeCut(), copyCuts(), createCGCutCMIR(), createCGCutStrongCG(), createRows(), createSubscip(), determineBound(), doSeparation(), mod2MatrixTransformContRows(), SCIP_DECL_HEUREXEC(), SCIPaddRowIndicator(), SCIPcutpoolAddNewRow(), SCIPrunBoundHeuristic(), SCIPsepastoreAddCut(), SCIPsolAdjustImplicitSolVals(), scoring(), separateCuts(), separateRltCuts(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), setupAggregationData(), shiftValues(), storeSuitableRows(), transformColumn(), updateActivities(), and updateRowActivities().

◆ SCIProwIsModifiable()

SCIP_Bool SCIProwIsModifiable ( SCIP_ROW * row )

returns TRUE iff row is modifiable during node processing (subject to column generation)

Parameters

row LP row

Definition at line 17411 of file lp.c.

References SCIP_Row::modifiable, and NULL.

Referenced by addOneRow(), aggregateGeneratedCuts(), applyFixings(), buildMod2Matrix(), computeCut(), computeRelIntPoint(), constructCutRow(), copyCuts(), createCGCutCMIR(), createCGCutStrongCG(), createCGMIPprimalsols(), createSubscip(), extractCapacityRows(), extractFlowRows(), generateGMICuts(), getGMIFromRow(), mod2MatrixTransformContRows(), SCIP_DECL_SEPAEXECLP(), SCIPcutpoolAddNewRow(), SCIPcutpoolSeparate(), SCIPsepastoreAddCut(), SCIPsepastoreApplyCuts(), SCIPsepastoreIsCutApplicable(), separateCuts(), sepastoreApplyBdchg(), sepastoreIsBdchgApplicable(), sepastoreIsCutRedundant(), sepastoreIsCutRedundantOrInfeasible(), setupAggregationData(), and transformColumn().

◆ SCIProwIsRemovable()

SCIP_Bool SCIProwIsRemovable ( SCIP_ROW * row )

returns TRUE iff row is removable from the LP (due to aging or cleanup)

Parameters

row LP row

Definition at line 17421 of file lp.c.

References NULL, and SCIP_Row::removable.

Referenced by cutpoolDelCut(), SCIPcutpoolAddNewRow(), and SCIPlpWriteMip().

◆ SCIProwGetOrigintype()

SCIP_ROWORIGINTYPE SCIProwGetOrigintype ( SCIP_ROW * row )

returns type of origin that created the row

Parameters

row LP row

Definition at line 17431 of file lp.c.

References NULL, and SCIP_Row::origintype.

Referenced by storeCuts().

◆ SCIProwGetOriginConshdlr()

SCIP_CONSHDLR * SCIProwGetOriginConshdlr ( SCIP_ROW * row )

returns origin constraint handler that created the row (NULL if not available)

Parameters

row LP row

Definition at line 17456 of file lp.c.

References NULL, SCIP_Row::origin, SCIP_Row::origintype, SCIP_ROWORIGINTYPE_CONS, SCIP_ROWORIGINTYPE_CONSHDLR, and SCIPconsGetHdlr().

Referenced by getDualBranchscore(), and SCIPcutpoolSeparate().

◆ SCIProwGetOriginCons()

SCIP_CONS * SCIProwGetOriginCons ( SCIP_ROW * row )

returns origin constraint that created the row (NULL if not available)

Parameters

row LP row

Definition at line 17441 of file lp.c.

References NULL, SCIP_Row::origin, SCIP_Row::origintype, and SCIP_ROWORIGINTYPE_CONS.

◆ SCIProwGetOriginSepa()

SCIP_SEPA * SCIProwGetOriginSepa ( SCIP_ROW * row )

returns origin separator that created the row (NULL if not available)

Parameters

row LP row

Definition at line 17476 of file lp.c.

References NULL, SCIP_Row::origin, SCIP_Row::origintype, and SCIP_ROWORIGINTYPE_SEPA.

Referenced by computeCut(), createSubscip(), SCIPcutpoolSeparate(), SCIPsepastoreAddCut(), sepastoreDelCut(), and storeSuitableRows().

◆ SCIProwIsInGlobalCutpool()

SCIP_Bool SCIProwIsInGlobalCutpool ( SCIP_ROW * row )

returns TRUE iff row is member of the global cut pool

Parameters

row LP row

Definition at line 17491 of file lp.c.

References SCIP_Row::inglobalcutpool, and NULL.

Referenced by scoring().

◆ SCIProwGetLPPos()

int SCIProwGetLPPos ( SCIP_ROW * row )

gets position of row in current LP, or -1 if it is not in LP

Parameters

row LP row

Definition at line 17501 of file lp.c.

References SCIP_Row::lpdepth, SCIP_Row::lppos, and NULL.

Referenced by addFlowrowToCommodity(), addFracCounter(), addRowToCut(), addSideRemoval(), aggregateNextRow(), calcShiftVal(), calculateBounds(), cleanupNetwork(), createAndStoreSparseRays(), createSubscip(), deleteCommodity(), determineBound(), extractCapacityRows(), extractFlowRows(), extractNodes(), generateClusterCuts(), getFlowrowFit(), getGMIFromRow(), getIncidentNodes(), getNextFlowrow(), getNodeSimilarityScore(), identifySourcesTargets(), initMatrix(), invertCommodity(), mcfnetworkFill(), mod2MatrixAddOrigRow(), relaxVar(), SCIP_DECL_HEUREXEC(), SCIPaggrRowAddRow(), SCIPaggrRowHasRowBeenAdded(), SCIPapplyLockFixings(), SCIPrunBoundHeuristic(), separateCuts(), setupAggregationData(), shiftValues(), storeCuts(), transformColumn(), tryFixVar(), updateActivities(), updateRowActivities(), updateSlacks(), and updateViolations().

◆ SCIProwGetLPDepth()

int SCIProwGetLPDepth ( SCIP_ROW * row )

gets depth in the tree where the row entered the LP, or -1 if it is not in LP

Parameters

row LP row

Definition at line 17512 of file lp.c.

References SCIP_Row::lpdepth, SCIP_Row::lppos, and NULL.

Referenced by SCIPgetDualProof(), and SCIPgetFarkasProof().

◆ SCIProwIsInLP()

SCIP_Bool SCIProwIsInLP ( SCIP_ROW * row )

returns TRUE iff row is member of current LP

Parameters

row LP row

Definition at line 17523 of file lp.c.

References SCIP_Row::lpdepth, SCIP_Row::lppos, and NULL.

Referenced by addBoundCutSepa(), addCut(), addCuts(), addObjCutoff(), addRelaxation(), allRowsInLP(), applyFixings(), applyObbt(), applyObbtBilinear(), calcShiftVal(), checkCons(), createRow(), generateDisjCutSOS1(), initsepaBoundInequalityFromCardinality(), initsepaBoundInequalityFromSOS1Cons(), SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSINITLP(), SCIP_DECL_CONSSEPALP(), SCIP_DECL_CONSSEPASOL(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_SEPAEXECLP(), SCIPcutpoolSeparate(), SCIPlpGetDualDegeneracy(), SCIPsolAdjustImplicitSolVals(), SCIPupgradeConsLinear(), sepaImplBoundCutsSOS1(), separateCons(), separateConsBinaryRepresentation(), separateCoverCutsCons(), separateCuts(), sepastoreApplyCut(), takeCut(), and updateActivities().

◆ SCIProwGetActiveLPCount()

SCIP_Longint SCIProwGetActiveLPCount ( SCIP_ROW * row )

returns the number of times that this row has been sharp in an optimal LP solution

Parameters

row row

Definition at line 17545 of file lp.c.

References SCIP_Row::activeinlpcounter, and NULL.

Referenced by SCIPcutGetLPActivityQuot().

◆ SCIProwGetNLPsAfterCreation()

SCIP_Longint SCIProwGetNLPsAfterCreation ( SCIP_ROW * row )

returns the number of LPs since this row has been created

Parameters

row row

Definition at line 17555 of file lp.c.

References SCIP_Row::nlpsaftercreation, and NULL.

Referenced by SCIPcutGetLPActivityQuot().

◆ SCIProwChgRank()

void SCIProwChgRank	(	SCIP_ROW *	row,
		int	rank
	)

changes the rank of LP row

Parameters

row	LP row
rank	new value for rank

Definition at line 17534 of file lp.c.

References NULL, and SCIP_Row::rank.

Referenced by addCut(), aggregateGeneratedCuts(), constructCutRow(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), generateOddCycleCut(), generateZerohalfCut(), newsolCliqueAddRow(), and SCIP_DECL_SEPAEXECLP().

◆ SCIPcreateRowConshdlr()

SCIP_RETCODE SCIPcreateRowConshdlr	(	SCIP *	scip,
		SCIP_ROW **	row,
		SCIP_CONSHDLR *	conshdlr,
		const char *	name,
		int	len,
		SCIP_COL **	cols,
		SCIP_Real *	vals,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row from a constraint handler

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	pointer to row
conshdlr	constraint handler that creates the row
name	name of row
len	number of nonzeros in the row
cols	array with columns of row entries
vals	array with coefficients of row entries
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1225 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_CONSHDLR, SCIPcheckStage(), SCIProwCreate(), and TRUE.

◆ SCIPcreateRowCons()

SCIP_RETCODE SCIPcreateRowCons	(	SCIP *	scip,
		SCIP_ROW **	row,
		SCIP_CONS *	cons,
		const char *	name,
		int	len,
		SCIP_COL **	cols,
		SCIP_Real *	vals,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row from a constraint

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	pointer to row
cons	constraint that creates the row
name	name of row
len	number of nonzeros in the row
cols	array with columns of row entries
vals	array with coefficients of row entries
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1259 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_CONS, SCIPcheckStage(), SCIProwCreate(), and TRUE.

◆ SCIPcreateRowSepa()

SCIP_RETCODE SCIPcreateRowSepa	(	SCIP *	scip,
		SCIP_ROW **	row,
		SCIP_SEPA *	sepa,
		const char *	name,
		int	len,
		SCIP_COL **	cols,
		SCIP_Real *	vals,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row from a separator

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	pointer to row
sepa	separator that creates the row
name	name of row
len	number of nonzeros in the row
cols	array with columns of row entries
vals	array with coefficients of row entries
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1293 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_SEPA, SCIPcheckStage(), SCIProwCreate(), and TRUE.

◆ SCIPcreateRowUnspec()

SCIP_RETCODE SCIPcreateRowUnspec	(	SCIP *	scip,
		SCIP_ROW **	row,
		const char *	name,
		int	len,
		SCIP_COL **	cols,
		SCIP_Real *	vals,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row from an unspecified source

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	pointer to row
name	name of row
len	number of nonzeros in the row
cols	array with columns of row entries
vals	array with coefficients of row entries
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1327 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_UNSPEC, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by SCIPcreateRow().

◆ SCIPcreateRow()

SCIP_RETCODE SCIPcreateRow	(	SCIP *	scip,
		SCIP_ROW **	row,
		const char *	name,
		int	len,
		SCIP_COL **	cols,
		SCIP_Real *	vals,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Deprecated:: Please use SCIPcreateRowConshdlr() or SCIPcreateRowSepa() when calling from a constraint handler or separator in order to facilitate correct statistics. If the call is from neither a constraint handler or separator, use SCIPcreateRowUnspec().

creates and captures an LP row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Deprecated:: Please use SCIPcreateRowConshdlr() or SCIPcreateRowSepa() when calling from a constraint handler or separator in order to facilitate correct statistics. If the call is from neither a constraint handler or separator, use SCIPcreateRowUnspec().

Parameters

scip	SCIP data structure
row	pointer to row
name	name of row
len	number of nonzeros in the row
cols	array with columns of row entries
vals	array with coefficients of row entries
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1361 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIPcreateRowUnspec(), and TRUE.

◆ SCIPcreateEmptyRowConshdlr()

SCIP_RETCODE SCIPcreateEmptyRowConshdlr	(	SCIP *	scip,
		SCIP_ROW **	row,
		SCIP_CONSHDLR *	conshdlr,
		const char *	name,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row without any coefficients from a constraint handler

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	pointer to row
conshdlr	constraint handler that creates the row
name	name of row
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1391 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_CONSHDLR, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by addCut(), createAndAddTransferredCut(), createDisaggrRow(), createRow(), extendToCover(), generateAndApplyBendersIntegerCuts(), generateAndApplyBendersNogoodCut(), generateBoundInequalityFromSOS1Nodes(), LOPseparate(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSINITLP(), SCIPgenerateAndApplyBendersOptCut(), SCIPgetRowprepRowConshdlr(), sepaImplBoundCutsSOS1(), separateSCIs(), separateSequLiftedExtendedWeightInequality(), separateSupLiftedMinimalCoverInequality(), and sepaSubtour().

◆ SCIPcreateEmptyRowCons()

SCIP_RETCODE SCIPcreateEmptyRowCons	(	SCIP *	scip,
		SCIP_ROW **	row,
		SCIP_CONS *	cons,
		const char *	name,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row without any coefficients from a constraint

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	pointer to row
cons	constraint that creates the row
name	name of row
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1422 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_CONS, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by addOrbisackCover(), addOrbisackInequality(), addRelaxation(), addSymresackInequality(), createCapacityRestriction(), createCapacityRestrictionIntvars(), createCoverCutsTimepoint(), createRelaxation(), createRow(), createRows(), generateRowCardinality(), generateRowSOS2(), initLP(), SCIP_DECL_CONSINITLP(), SCIPgetRowprepRowCons(), separateCons(), separateCoversOrbisack(), separateIndicators(), separatePerspective(), and separateSequLiftedMinimalCoverInequality().

◆ SCIPcreateEmptyRowSepa()

SCIP_RETCODE SCIPcreateEmptyRowSepa	(	SCIP *	scip,
		SCIP_ROW **	row,
		SCIP_SEPA *	sepa,
		const char *	name,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row without any coefficients from a separator

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	pointer to row
sepa	separator that creates the row
name	name of row
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1453 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_SEPA, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by addCut(), addPathCuts(), addSubtourCuts(), addTourCuts(), aggregateGeneratedCuts(), computeCut(), computeRltCut(), constructCutRow(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createObjRow(), createPartitionCut(), generateCut(), generateDisjCutSOS1(), generateOddCycleCut(), generateZerohalfCut(), newsolCliqueAddRow(), SCIP_DECL_SEPAEXECLP(), SCIPgetRowprepRowSepa(), separateCuts(), separateMcCormickImplicit(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), and separateSupLiftedMinimalCoverInequality().

◆ SCIPcreateEmptyRowUnspec()

SCIP_RETCODE SCIPcreateEmptyRowUnspec	(	SCIP *	scip,
		SCIP_ROW **	row,
		const char *	name,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row without any coefficients from an unspecified source

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	pointer to row
name	name of row
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1482 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ROWORIGINTYPE_UNSPEC, SCIPcheckStage(), SCIProwCreate(), and TRUE.

Referenced by addObjCutoff(), SCIP_DECL_BRANCHEXECLP(), SCIPcreateEmptyRow(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), and solveBilinearLP().

◆ SCIPcreateEmptyRow()

SCIP_RETCODE SCIPcreateEmptyRow	(	SCIP *	scip,
		SCIP_ROW **	row,
		const char *	name,
		SCIP_Real	lhs,
		SCIP_Real	rhs,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	removable
	)

creates and captures an LP row without any coefficients

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Deprecated:: Please use SCIPcreateEmptyRowConshdlr() or SCIPcreateEmptyRowSepa() when calling from a constraint handler or separator in order to facilitate correct statistics. If the call is from neither a constraint handler or separator, use SCIPcreateEmptyRowUnspec().

creates and captures an LP row without any coefficients

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Deprecated:: Please use SCIPcreateEmptyRowConshdlr() or SCIPcreateEmptyRowSepa() when calling from a constraint handler or separator in order to facilitate correct statistics. If the call is from neither a constraint handler or separator, use SCIPcreateEmptyRowUnspec().

Parameters

scip	SCIP data structure
row	pointer to row
name	name of row
lhs	left hand side of row
rhs	right hand side of row
local	is row only valid locally?
modifiable	is row modifiable during node processing (subject to column generation)?
removable	should the row be removed from the LP due to aging or cleanup?

Definition at line 1513 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIPcreateEmptyRowUnspec(), and TRUE.

◆ SCIPcaptureRow()

SCIP_RETCODE SCIPcaptureRow	(	SCIP *	scip,
		SCIP_ROW *	row
	)

increases usage counter of LP row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	row to capture

Definition at line 1540 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwCapture(), and TRUE.

Referenced by mcfnetworkFill().

◆ SCIPreleaseRow()

SCIP_RETCODE SCIPreleaseRow	(	SCIP *	scip,
		SCIP_ROW **	row
	)

decreases usage counter of LP row, and frees memory if necessary

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	pointer to LP row

Definition at line 1562 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwRelease(), and TRUE.

Referenced by addCut(), addCutPool(), addOrbisackCover(), addOrbisackInequality(), addPathCuts(), addSubtourCuts(), addSymresackInequality(), addTourCuts(), aggregation(), applyObbt(), applyObbtBilinear(), computeCut(), consdataFree(), consdataFreeRows(), createAndAddTransferredCut(), createCapacityRestrictionIntvars(), createCGCutCMIR(), createCGCutDirect(), createCGCuts(), createCGCutStrongCG(), createRow(), doSeparation(), extendToCover(), generateAndApplyBendersIntegerCuts(), generateAndApplyBendersNogoodCut(), generateOddCycleCut(), generateZerohalfCut(), initLP(), initsepaBoundInequalityFromCardinality(), initsepaBoundInequalityFromSOS1Cons(), LOPseparate(), mcfnetworkFree(), newsolCliqueAddRow(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSDELETE(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSEXITSOL(), SCIP_DECL_CONSINITLP(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_NLHDLREXITSEPA(), SCIP_DECL_NLHDLRINITSEPA(), SCIP_DECL_NLHDLRSOLLINEARIZE(), SCIP_DECL_SEPAEXECLP(), SCIP_DECL_SEPAEXITSOL(), SCIPgenerateAndApplyBendersOptCut(), SCIPprocessRowprepNonlinear(), SCIPupgradeConsLinear(), sepaImplBoundCutsSOS1(), separateCons(), separateCoversOrbisack(), separateCuts(), separateDeterminant(), separateIndicators(), separateMcCormickImplicit(), separatePerspective(), separateRltCuts(), separateSCIs(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), sepaSubtour(), solveBilinearLP(), and TCLIQUE_NEWSOL().

◆ SCIPchgRowLhs()

SCIP_RETCODE SCIPchgRowLhs	(	SCIP *	scip,
		SCIP_ROW *	row,
		SCIP_Real	lhs
	)

changes left hand side of LP row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row
lhs	new left hand side

Definition at line 1583 of file scip_lp.c.

References FALSE, SCIP_Row::lppos, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIPlpDiving(), SCIProwChgLhs(), and TRUE.

Referenced by chgLhs(), computeNogoodCut(), computeRltCut(), computeStandardIntegerOptCut(), generateAndApplyBendersIntegerCuts(), generateCut(), handleNewVariableSOS2(), SCIP_DECL_NLHDLRINITSEPA(), and separateMcCormickImplicit().

◆ SCIPchgRowRhs()

SCIP_RETCODE SCIPchgRowRhs	(	SCIP *	scip,
		SCIP_ROW *	row,
		SCIP_Real	rhs
	)

changes right hand side of LP row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row
rhs	new right hand side

Definition at line 1607 of file scip_lp.c.

References FALSE, SCIP_Row::lppos, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIPlpDiving(), SCIProwChgRhs(), and TRUE.

Referenced by chgRhs(), computeCut(), computeRltCut(), generateCut(), generateOddCycleCut(), handleNewVariableSOS2(), SCIP_DECL_NLHDLRINITSEPA(), and separateMcCormickImplicit().

◆ SCIPcacheRowExtensions()

SCIP_RETCODE SCIPcacheRowExtensions	(	SCIP *	scip,
		SCIP_ROW *	row
	)

informs row, that all subsequent additions of variables to the row should be cached and not directly applied; after all additions were applied, SCIPflushRowExtensions() must be called; while the caching of row extensions is activated, information methods of the row give invalid results; caching should be used, if a row is build with SCIPaddVarToRow() calls variable by variable to increase the performance

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1635 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwDelaySort(), and TRUE.

Referenced by addCut(), addObjCutoff(), addOrbisackCover(), addOrbisackInequality(), addPathCuts(), addSubtourCuts(), addSymresackInequality(), addTourCuts(), aggregateGeneratedCuts(), computeCut(), computeRltCut(), constructCutRow(), createCapacityRestriction(), createCapacityRestrictionIntvars(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createCoverCutsTimepoint(), createObjRow(), createPartitionCut(), createRelaxation(), createRow(), extendToCover(), generateCut(), generateDisjCutSOS1(), generateOddCycleCut(), generateZerohalfCut(), LOPseparate(), newsolCliqueAddRow(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_SEPAEXECLP(), sepaImplBoundCutsSOS1(), separateCons(), separateCoversOrbisack(), separateIndicators(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), and sepaSubtour().

◆ SCIPflushRowExtensions()

SCIP_RETCODE SCIPflushRowExtensions	(	SCIP *	scip,
		SCIP_ROW *	row
	)

flushes all cached row extensions after a call of SCIPcacheRowExtensions() and merges coefficients with equal columns into a single coefficient

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1658 of file scip_lp.c.

References FALSE, rowLink(), SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwForceSort(), and TRUE.

Referenced by addCut(), addObjCutoff(), addOrbisackCover(), addOrbisackInequality(), addPathCuts(), addSubtourCuts(), addSymresackInequality(), addTourCuts(), aggregateGeneratedCuts(), computeCut(), computeRltCut(), constructCutRow(), createCapacityRestriction(), createCapacityRestrictionIntvars(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createCoverCutsTimepoint(), createObjRow(), createPartitionCut(), createRelaxation(), createRow(), extendToCover(), generateCut(), generateDisjCutSOS1(), generateOddCycleCut(), generateZerohalfCut(), LOPseparate(), newsolCliqueAddRow(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_SEPAEXECLP(), sepaImplBoundCutsSOS1(), separateCons(), separateCoversOrbisack(), separateIndicators(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), and sepaSubtour().

◆ SCIPaddVarToRow()

SCIP_RETCODE SCIPaddVarToRow	(	SCIP *	scip,
		SCIP_ROW *	row,
		SCIP_VAR *	var,
		SCIP_Real	val
	)

resolves variable to columns and adds them with the coefficient to the row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Attention: If the absolute value of val is below the SCIP epsilon tolerance, the variable will not added.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Note: In case calling this method in the enforcement process of an lp solution, it might be that some variables, that were not yet in the LP (e.g. dynamic columns) will change their lp solution value returned by SCIP. For example, a variable, which has a negative objective value, that has no column in the lp yet, is in the lp solution on its upper bound (variables with status SCIP_VARSTATUS_LOOSE are in an lp solution on it's best bound), but creating the column, changes the solution value (variable than has status SCIP_VARSTATUS_COLUMN, and the initialization sets the lp solution value) to 0.0. (This leads to the conclusion that, if a constraint was violated, the linear relaxation might not be violated anymore.); When several variables are added to a row with the use of this function, performance can be improved by calling SCIPcacheRowExtensions() before these additions and SCIPflushRowExtensions() after.

resolves variable to columns and adds them with the coefficient to the row

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Attention: If the absolute value of val is below the SCIP epsilon tolerance, the variable will not added.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Note: In case calling this method in the enforcement process of an lp solution, it might be that some variables, that were not yet in the LP (e.g. dynamic columns) will change their lp solution value returned by SCIP. For example, a variable, which has a negative objective value, that has no column in the lp yet, is in the lp solution on its upper bound (variables with status SCIP_VARSTATUS_LOOSE are in an lp solution on it's best bound), but creating the column, changes the solution value (variable than has status SCIP_VARSTATUS_COLUMN, and the initialization sets the lp solution value) to 0.0. (This leads to the conclusion that, if a constraint was violated, the linear relaxation might not be violated anymore.); If the variable being added is FIXED (as given by the status SCIP_VARSTATUS_FIXED), then the variable is not added to the row, but the corresponding constant is added. Similarly, if the input variable is aggregated (as given by the status SCIP_VARSTATUS_AGGREGATED), then the input variable is substituted with its aggregation. For other cases, and to better understand the function behavior, please check the code of SCIPvarAddToRow.; When several variables are added to a row with the use of this function, performance can be improved by calling SCIPcacheRowExtensions() before these additions and SCIPflushRowExtensions() after.

Parameters

scip	SCIP data structure
row	LP row
var	problem variable
val	value of coefficient

Definition at line 1701 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIPvarAddToRow(), and TRUE.

Referenced by addAuxiliaryVariableToCut(), addBilinearTermToCut(), addCoef(), addCut(), addFacetToCut(), addLinearTermToCut(), addObjCutoff(), addOrbisackCover(), addOrbisackInequality(), addPathCuts(), addRelaxation(), addRltTerm(), addSubtourCuts(), addSymresackInequality(), addTourCuts(), aggregateGeneratedCuts(), computeNogoodCut(), computeRltCut(), computeStandardIntegerOptCut(), constructCutRow(), createAndAddTransferredCut(), createCapacityRestriction(), createCapacityRestrictionIntvars(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createCoverCutsTimepoint(), createDisaggrRow(), createObjRow(), createPartitionCut(), createRelaxation(), createRow(), createRows(), delCoefPos(), extendToCover(), generateCut(), generateDisjCutSOS1(), generateOddCycleCut(), generateZerohalfCut(), handleNewVariableCardinality(), handleNewVariableSOS1(), handleNewVariableSOS2(), initLP(), LOPseparate(), newsolCliqueAddRow(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_EVENTEXEC(), SCIP_DECL_SEPAEXECLP(), SCIPgenerateAndApplyBendersOptCut(), sepaImplBoundCutsSOS1(), separateCons(), separateCoversOrbisack(), separateIndicators(), separateMcCormickImplicit(), separateSequLiftedExtendedWeightInequality(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), sepaSubtour(), and solveBilinearLP().

◆ SCIPaddVarsToRow()

SCIP_RETCODE SCIPaddVarsToRow	(	SCIP *	scip,
		SCIP_ROW *	row,
		int	nvars,
		SCIP_VAR **	vars,
		SCIP_Real *	vals
	)

resolves variables to columns and adds them with the coefficients to the row; this method caches the row extensions and flushes them afterwards to gain better performance

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Attention: If a coefficients absolute value is below the SCIP epsilon tolerance, the variable with its value is not added.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row
nvars	number of variables to add to the row
vars	problem variables to add
vals	values of coefficients

Definition at line 1727 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwDelaySort(), SCIProwEnsureSize(), SCIProwForceSort(), SCIProwGetNNonz(), SCIPvarAddToRow(), and TRUE.

Referenced by addCut(), createRow(), generateBoundInequalityFromSOS1Nodes(), generateRowCardinality(), initLP(), SCIPgenerateAndApplyBendersOptCut(), SCIPgetRowprepRowCons(), SCIPgetRowprepRowConshdlr(), SCIPgetRowprepRowSepa(), separatePerspective(), and separateSCIs().

◆ SCIPaddVarsToRowSameCoef()

SCIP_RETCODE SCIPaddVarsToRowSameCoef	(	SCIP *	scip,
		SCIP_ROW *	row,
		int	nvars,
		SCIP_VAR **	vars,
		SCIP_Real	val
	)

resolves variables to columns and adds them with the same single coefficient to the row; this method caches the row extensions and flushes them afterwards to gain better performance

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Attention: If the absolute value of val is below the SCIP epsilon tolerance, the variables will not added.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row
nvars	number of variables to add to the row
vars	problem variables to add
val	unique value of all coefficients

Definition at line 1773 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwDelaySort(), SCIProwEnsureSize(), SCIProwForceSort(), SCIProwGetNNonz(), SCIPvarAddToRow(), and TRUE.

Referenced by addRelaxation(), createRelaxation(), createRow(), createRows(), and generateRowSOS2().

◆ SCIPcalcRowIntegralScalar()

SCIP_RETCODE SCIPcalcRowIntegralScalar	(	SCIP *	scip,
		SCIP_ROW *	row,
		SCIP_Real	mindelta,
		SCIP_Real	maxdelta,
		SCIP_Longint	maxdnom,
		SCIP_Real	maxscale,
		SCIP_Bool	usecontvars,
		SCIP_Real *	intscalar,
		SCIP_Bool *	success
	)

tries to find a value, such that all row coefficients, if scaled with this value become integral

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row
mindelta	minimal relative allowed difference of scaled coefficient s*c and integral i
maxdelta	maximal relative allowed difference of scaled coefficient s*c and integral i
maxdnom	maximal denominator allowed in rational numbers
maxscale	maximal allowed scalar
usecontvars	should the coefficients of the continuous variables also be made integral?
intscalar	pointer to store scalar that would make the coefficients integral, or NULL
success	stores whether returned value is valid

Definition at line 1815 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwCalcIntegralScalar(), and TRUE.

◆ SCIPmakeRowIntegral()

SCIP_RETCODE SCIPmakeRowIntegral	(	SCIP *	scip,
		SCIP_ROW *	row,
		SCIP_Real	mindelta,
		SCIP_Real	maxdelta,
		SCIP_Longint	maxdnom,
		SCIP_Real	maxscale,
		SCIP_Bool	usecontvars,
		SCIP_Bool *	success
	)

tries to scale row, s.t. all coefficients (of integer variables) become integral

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row
mindelta	minimal relative allowed difference of scaled coefficient s*c and integral i
maxdelta	maximal relative allowed difference of scaled coefficient s*c and integral i
maxdnom	maximal denominator allowed in rational numbers
maxscale	maximal value to scale row with
usecontvars	should the coefficients of the continuous variables also be made integral?
success	stores whether row could be made rational

Definition at line 1844 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwMakeIntegral(), and TRUE.

Referenced by addCut(), addCuts(), createCGCutCMIR(), createCGCutStrongCG(), evaluateCutNumerics(), and generateDisjCutSOS1().

◆ SCIPmarkRowNotRemovableLocal()

void SCIPmarkRowNotRemovableLocal	(	SCIP *	scip,
		SCIP_ROW *	row
	)

marks a row to be not removable from the LP in the current node

Precondition

this method can be called in the following stage of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1868 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwMarkNotRemovableLocal(), and TRUE.

Referenced by addCut(), and SCIPprocessRowprepNonlinear().

◆ SCIPgetRowNumIntCols()

int SCIPgetRowNumIntCols	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns number of integral columns in the row

Returns: number of integral columns in the row

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1886 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetNumIntCols(), and TRUE.

Referenced by addCut(), addCuts(), evaluateCutNumerics(), SCIP_DECL_BRANCHEXECLP(), and scoring().

◆ SCIPgetRowMinCoef()

SCIP_Real SCIPgetRowMinCoef	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns minimal absolute value of row vector's non-zero coefficients

Returns: minimal absolute value of row vector's non-zero coefficients

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1904 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetMinval(), and TRUE.

Referenced by addCut(), computeCut(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_SEPAEXECLP(), and scoring().

◆ SCIPgetRowMaxCoef()

SCIP_Real SCIPgetRowMaxCoef	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns maximal absolute value of row vector's non-zero coefficients

Returns: maximal absolute value of row vector's non-zero coefficients

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1922 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetMaxval(), and TRUE.

Referenced by addCut(), addPathCuts(), addTourCuts(), computeCut(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), generateClusterCuts(), initMatrix(), nodepairqueueCreate(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_SEPAEXECLP(), and scoring().

◆ SCIPgetRowMinActivity()

SCIP_Real SCIPgetRowMinActivity	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns the minimal activity of a row w.r.t. the column's bounds

Returns: the minimal activity of a row w.r.t. the column's bounds

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1939 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetMinActivity(), and TRUE.

Referenced by aggregateGeneratedCuts(), constructCutRow(), generateLiftedFlowCoverCut(), and SCIPapplyLockFixings().

◆ SCIPgetRowMaxActivity()

SCIP_Real SCIPgetRowMaxActivity	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns the maximal activity of a row w.r.t. the column's bounds

Returns: the maximal activity of a row w.r.t. the column's bounds

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1956 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetMaxActivity(), and TRUE.

Referenced by aggregateGeneratedCuts(), constructCutRow(), generateLiftedFlowCoverCut(), and SCIPapplyLockFixings().

◆ SCIPrecalcRowLPActivity()

SCIP_RETCODE SCIPrecalcRowLPActivity	(	SCIP *	scip,
		SCIP_ROW *	row
	)

recalculates the activity of a row in the last LP solution

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1974 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwRecalcLPActivity(), and TRUE.

◆ SCIPgetRowLPActivity()

SCIP_Real SCIPgetRowLPActivity	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns the activity of a row in the last LP solution

Returns: activity of a row in the last LP solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 1993 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPActivity(), and TRUE.

Referenced by addCut(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createCGMIPprimalsols(), createSubscip(), generateDisjCutSOS1(), getGMIFromRow(), getSimplexCoefficients(), SCIP_DECL_SEPAEXECLP(), and separateCons().

◆ SCIPgetRowLPFeasibility()

SCIP_Real SCIPgetRowLPFeasibility	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns the feasibility of a row in the last LP solution

Returns: the feasibility of a row in the last LP solution: negative value means infeasibility

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 2010 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPFeasibility(), and TRUE.

Referenced by calcBranchScore(), separateCons(), separateConsBinaryRepresentation(), and separateCoverCutsCons().

◆ SCIPrecalcRowPseudoActivity()

SCIP_RETCODE SCIPrecalcRowPseudoActivity	(	SCIP *	scip,
		SCIP_ROW *	row
	)

recalculates the activity of a row for the current pseudo solution

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 2028 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwRecalcPseudoActivity(), and TRUE.

◆ SCIPgetRowPseudoActivity()

SCIP_Real SCIPgetRowPseudoActivity	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns the activity of a row for the current pseudo solution

Returns: the activity of a row for the current pseudo solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 2047 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetPseudoActivity(), and TRUE.

◆ SCIPgetRowPseudoFeasibility()

SCIP_Real SCIPgetRowPseudoFeasibility	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns the feasibility of a row for the current pseudo solution: negative value means infeasibility

Returns: the feasibility of a row for the current pseudo solution: negative value means infeasibility

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 2064 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetPseudoFeasibility(), and TRUE.

◆ SCIPrecalcRowActivity()

SCIP_RETCODE SCIPrecalcRowActivity	(	SCIP *	scip,
		SCIP_ROW *	row
	)

recalculates the activity of a row in the last LP or pseudo solution

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 2082 of file scip_lp.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwRecalcLPActivity(), SCIProwRecalcPseudoActivity(), SCIPtreeHasCurrentNodeLP(), and TRUE.

◆ SCIPgetRowActivity()

SCIP_Real SCIPgetRowActivity	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns the activity of a row in the last LP or pseudo solution

Returns: the activity of a row in the last LP or pseudo solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 2104 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPActivity(), SCIProwGetPseudoActivity(), SCIPtreeHasCurrentNodeLP(), and TRUE.

Referenced by addRowToCut(), createRows(), generateGMICuts(), getGMIFromRow(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_HEUREXEC(), and SCIP_DECL_SEPAEXECLP().

◆ SCIPgetRowFeasibility()

SCIP_Real SCIPgetRowFeasibility	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns the feasibility of a row in the last LP or pseudo solution

Returns: the feasibility of a row in the last LP or pseudo solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 2124 of file scip_lp.c.

References FALSE, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPFeasibility(), SCIProwGetPseudoFeasibility(), SCIPtreeHasCurrentNodeLP(), and TRUE.

Referenced by generateClusterCuts(), nodepairqueueCreate(), scoring(), separateMcCormickImplicit(), and separateRltCuts().

◆ SCIPgetRowSolActivity()

SCIP_Real SCIPgetRowSolActivity	(	SCIP *	scip,
		SCIP_ROW *	row,
		SCIP_SOL *	sol
	)

returns the activity of a row for the given primal solution

Returns: the activitiy of a row for the given primal solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row
sol	primal CIP solution

Definition at line 2144 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPActivity(), SCIProwGetPseudoActivity(), SCIProwGetSolActivity(), SCIPtreeHasCurrentNodeLP(), and TRUE.

Referenced by addCut(), aggregation(), applyRepair(), buildMod2Matrix(), checkCons(), computeCut(), computeNogoodCut(), computeStandardIntegerOptCut(), getNActiveConsScore(), mod2MatrixTransformContRows(), SCIP_DECL_HEUREXEC(), SCIPcutGenerationHeuristicCMIR(), SCIPgenerateAndApplyBendersOptCut(), SCIPgetActivityLinear(), separateCuts(), and updateSubgradient().

◆ SCIPgetRowSolFeasibility()

SCIP_Real SCIPgetRowSolFeasibility	(	SCIP *	scip,
		SCIP_ROW *	row,
		SCIP_SOL *	sol
	)

returns the feasibility of a row for the given primal solution

Returns: the feasibility of a row for the given primal solution

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row
sol	primal CIP solution

Definition at line 2167 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetLPFeasibility(), SCIProwGetPseudoFeasibility(), SCIProwGetSolFeasibility(), SCIPtreeHasCurrentNodeLP(), and TRUE.

Referenced by addCut(), extendToCover(), generateClusterCuts(), SCIP_DECL_NLHDLRENFO(), SCIPgetFeasibilityLinear(), separateCons(), separateConsBinaryRepresentation(), and separateCoverCutsCons().

◆ SCIPgetRowObjParallelism()

SCIP_Real SCIPgetRowObjParallelism	(	SCIP *	scip,
		SCIP_ROW *	row
	)

returns the parallelism of row with objective function

Returns: 1 is returned if the row is parallel to the objective function and 0 if it is orthogonal

Precondition

this method can be called in one of the following stages of the SCIP solving process:

SCIP_STAGE_SOLVING

Parameters

scip	SCIP data structure
row	LP row

Definition at line 2190 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL_ABORT, SCIPcheckStage(), SCIProwGetObjParallelism(), and TRUE.

Referenced by SCIP_DECL_BRANCHEXECLP(), and scoring().

◆ SCIPprintRow()

SCIP_RETCODE SCIPprintRow	(	SCIP *	scip,
		SCIP_ROW *	row,
		FILE *	file
	)

output row to file stream via the message handler system

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

output row to file stream via the message handler system

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

this method can be called in one of the following stages of the SCIP solving process:

Parameters

scip	SCIP data structure
row	LP row
file	output file (or NULL for standard output)

Definition at line 2212 of file scip_lp.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcheckStage(), SCIProwPrint(), and TRUE.

Referenced by addBoundCutSepa(), addCut(), addOrbisackCover(), addOrbisackInequality(), addPathCuts(), addRelaxation(), addSubtourCuts(), addTourCuts(), computeCut(), computeRltCut(), createCapacityRestriction(), createCapacityRestrictionIntvars(), createCGCutCMIR(), createCGCutDirect(), createCGCutStrongCG(), createObjRow(), createPartitionCut(), createRow(), extendToCover(), generateAndApplyBendersIntegerCuts(), generateAndApplyBendersNogoodCut(), generateBoundInequalityFromSOS1Nodes(), generateCut(), generateOddCycleCut(), generateRowCardinality(), generateRowSOS2(), initLP(), initMatrix(), initsepaBoundInequalityFromCardinality(), initsepaBoundInequalityFromSOS1Cons(), LOPseparate(), rowCalculateGauss(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSINITLP(), SCIP_DECL_CONSSEPALP(), SCIP_DECL_CONSSEPASOL(), SCIP_DECL_HEUREXEC(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_NLHDLRINITSEPA(), SCIP_DECL_SEPAEXECLP(), SCIPapplyLockFixings(), SCIPprocessRowprepNonlinear(), SCIProwCalcProbability(), sepaImplBoundCutsSOS1(), separateCons(), separateCoversOrbisack(), separateCuts(), separateIndicators(), separatePerspective(), and separateRltCuts().

SCIP

Detailed Description

Functions

Function Documentation

◆ SCIP_DECL_SORTPTRCOMP()

◆ SCIProwLock()

◆ SCIProwUnlock()

◆ SCIProwGetScalarProduct()

◆ SCIProwGetParallelism()

◆ SCIProwGetOrthogonality()

◆ SCIProwSort()

◆ SCIProwGetNNonz()

◆ SCIProwGetNLPNonz()

◆ SCIProwGetCols()

◆ SCIProwGetVals()

◆ SCIProwGetConstant()

◆ SCIProwGetNorm()

◆ SCIProwGetSumNorm()

◆ SCIProwGetLhs()

◆ SCIProwGetRhs()

◆ SCIProwGetDualsol()

◆ SCIProwGetDualfarkas()

◆ SCIProwGetBasisStatus()

◆ SCIProwGetName()

◆ SCIProwGetIndex()

◆ SCIProwGetAge()

◆ SCIProwGetRank()

◆ SCIProwIsIntegral()

◆ SCIProwIsLocal()

◆ SCIProwIsModifiable()

◆ SCIProwIsRemovable()

◆ SCIProwGetOrigintype()

◆ SCIProwGetOriginConshdlr()

◆ SCIProwGetOriginCons()

◆ SCIProwGetOriginSepa()

◆ SCIProwIsInGlobalCutpool()

◆ SCIProwGetLPPos()

◆ SCIProwGetLPDepth()

◆ SCIProwIsInLP()

◆ SCIProwGetActiveLPCount()

◆ SCIProwGetNLPsAfterCreation()

◆ SCIProwChgRank()

◆ SCIPcreateRowConshdlr()

◆ SCIPcreateRowCons()

◆ SCIPcreateRowSepa()

◆ SCIPcreateRowUnspec()

◆ SCIPcreateRow()

◆ SCIPcreateEmptyRowConshdlr()

◆ SCIPcreateEmptyRowCons()

◆ SCIPcreateEmptyRowSepa()

◆ SCIPcreateEmptyRowUnspec()

◆ SCIPcreateEmptyRow()

◆ SCIPcaptureRow()

◆ SCIPreleaseRow()

◆ SCIPchgRowLhs()

◆ SCIPchgRowRhs()

◆ SCIPcacheRowExtensions()

◆ SCIPflushRowExtensions()

◆ SCIPaddVarToRow()

◆ SCIPaddVarsToRow()

◆ SCIPaddVarsToRowSameCoef()

◆ SCIPcalcRowIntegralScalar()

◆ SCIPmakeRowIntegral()

◆ SCIPmarkRowNotRemovableLocal()

◆ SCIPgetRowNumIntCols()

◆ SCIPgetRowMinCoef()

◆ SCIPgetRowMaxCoef()

◆ SCIPgetRowMinActivity()

◆ SCIPgetRowMaxActivity()

◆ SCIPrecalcRowLPActivity()

◆ SCIPgetRowLPActivity()

◆ SCIPgetRowLPFeasibility()

◆ SCIPrecalcRowPseudoActivity()

◆ SCIPgetRowPseudoActivity()

◆ SCIPgetRowPseudoFeasibility()

◆ SCIPrecalcRowActivity()

◆ SCIPgetRowActivity()

◆ SCIPgetRowFeasibility()

◆ SCIPgetRowSolActivity()

◆ SCIPgetRowSolFeasibility()