Column methods

Detailed Description

Functions
void	SCIPcolSort (SCIP_COL *col)
SCIP_Real	SCIPcolGetObj (SCIP_COL *col)
SCIP_Real	SCIPcolGetLb (SCIP_COL *col)
SCIP_Real	SCIPcolGetUb (SCIP_COL *col)
SCIP_Real	SCIPcolGetBestBound (SCIP_COL *col)
SCIP_Real	SCIPcolGetPrimsol (SCIP_COL *col)
SCIP_Real	SCIPcolGetMinPrimsol (SCIP_COL *col)
SCIP_Real	SCIPcolGetMaxPrimsol (SCIP_COL *col)
SCIP_BASESTAT	SCIPcolGetBasisStatus (SCIP_COL *col)
SCIP_VAR *	SCIPcolGetVar (SCIP_COL *col)
int	SCIPcolGetIndex (SCIP_COL *col)
SCIP_Bool	SCIPcolIsIntegral (SCIP_COL *col)
SCIP_Bool	SCIPcolIsRemovable (SCIP_COL *col)
int	SCIPcolGetLPPos (SCIP_COL *col)
int	SCIPcolGetLPDepth (SCIP_COL *col)
SCIP_Bool	SCIPcolIsInLP (SCIP_COL *col)
int	SCIPcolGetNNonz (SCIP_COL *col)
int	SCIPcolGetNLPNonz (SCIP_COL *col)
SCIP_ROW **	SCIPcolGetRows (SCIP_COL *col)
SCIP_Real *	SCIPcolGetVals (SCIP_COL *col)
SCIP_Longint	SCIPcolGetStrongbranchNode (SCIP_COL *col)
int	SCIPcolGetNStrongbranchs (SCIP_COL *col)
SCIP_BOUNDTYPE	SCIPboundtypeOpposite (SCIP_BOUNDTYPE boundtype)

Function Documentation

void SCIPcolSort

(

SCIP_COL *

col

)

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

Parameters

col	column to be sorted

SCIP_Real SCIPcolGetObj

(

SCIP_COL *

col

)

gets objective value of column

Parameters

col

LP column

SCIP_Real SCIPcolGetLb

(

SCIP_COL *

col

)

gets lower bound of column

Parameters

col

LP column

SCIP_Real SCIPcolGetUb

(

SCIP_COL *

col

)

gets upper bound of column

Parameters

col

LP column

SCIP_Real SCIPcolGetBestBound

(

SCIP_COL *

col

)

gets best bound of column with respect to the objective function

Parameters

col

LP column

SCIP_Real SCIPcolGetPrimsol

(

SCIP_COL *

col

)

gets the primal LP solution of a column

Parameters

col

LP column

SCIP_Real SCIPcolGetMinPrimsol

(

SCIP_COL *

col

)

gets the minimal LP solution value, this column ever assumed

Parameters

col

LP column

SCIP_Real SCIPcolGetMaxPrimsol

(

SCIP_COL *

col

)

gets the maximal LP solution value, this column ever assumed

Parameters

col

LP column

SCIP_BASESTAT SCIPcolGetBasisStatus

(

SCIP_COL *

col

)

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

Parameters

col

LP column

SCIP_VAR* SCIPcolGetVar

(

SCIP_COL *

col

)

gets variable this column represents

Parameters

col

LP column

int SCIPcolGetIndex

(

SCIP_COL *

col

)

gets unique index of col

Parameters

col

LP col

SCIP_Bool SCIPcolIsIntegral

(

SCIP_COL *

col

)

returns whether the associated variable is of integral type (binary, integer, implicit integer)

Parameters

col

LP column

SCIP_Bool SCIPcolIsRemovable

(

SCIP_COL *

col

)

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

Parameters

col

LP column

int SCIPcolGetLPPos

(

SCIP_COL *

col

)

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

Parameters

col

LP column

int SCIPcolGetLPDepth

(

SCIP_COL *

col

)

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

Parameters

col

LP column

SCIP_Bool SCIPcolIsInLP

(

SCIP_COL *

col

)

returns TRUE iff column is member of current LP

Parameters

col

LP column

int SCIPcolGetNNonz

(

SCIP_COL *

col

)

get number of nonzero entries in column vector

Parameters

col

LP column

int SCIPcolGetNLPNonz

(

SCIP_COL *

col

)

get number of nonzero entries in column vector, that correspond to rows currently in the SCIP_LP;

Warning

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

Parameters

col

LP column

SCIP_ROW** SCIPcolGetRows

(

SCIP_COL *

col

)

gets array with rows of nonzero entries

Parameters

col

LP column

SCIP_Real* SCIPcolGetVals

(

SCIP_COL *

col

)

gets array with coefficients of nonzero entries

Parameters

col

LP column

SCIP_Longint SCIPcolGetStrongbranchNode

(

SCIP_COL *

col

)

gets node number of the last node in current branch and bound run, where strong branching was used on the given column, or -1 if strong branching was never applied to the column in current run

Parameters

col

LP column

int SCIPcolGetNStrongbranchs

(

SCIP_COL *

col

)

gets number of times, strong branching was applied in current run on the given column

Parameters

col

LP column

SCIP_BOUNDTYPE SCIPboundtypeOpposite

(

SCIP_BOUNDTYPE

boundtype

)

gets opposite bound type of given bound type

Parameters

boundtype

type of bound (lower or upper)