GRBQConstr#

classGRBQConstr#

Gurobi quadratic constraint object. Quadratic constraints are alwaysassociated with a particular model. You create a quadratic constraintobject by adding a constraint to a model (usingGRBModel::addQConstr), rather than by using aGRBQConstrconstructor.

The methods on quadratic constraint objects are used to get and setquadratic constraint attributes. For example, quadratic constraintright-hand sides can be queried by callingget(GRB_DoubleAttr_QCRHS). Note, however, that it is generally moreefficient to query attributes for a set of constraints at once. This isdone using the attribute query method on theGRBModel object(GRBModel::get).

The full list of attributescan be found in theAttributes section of thisdocument. Examples of how to query and set attributes can also be foundinthis section.

charget(GRB_CharAttrattr)#

doubleget(GRB_DoubleAttrattr)#

intget(GRB_IntAttrattr)#

stringget(GRB_StringAttrattr)#

Query the value of a quadratic constraint attribute.

Parameters:

attr – The attribute being queried.

Returns:

The current value of the requested attribute.

voidset(GRB_CharAttrattr,charnewvalue)#

voidset(GRB_DoubleAttrattr,doublenewvalue)#

voidset(GRB_IntAttrattr,intnewvalue)#

voidset(GRB_StringAttrattr,conststring&newvalue)#

Set the value of a quadratic constraint attribute.

Parameters:

• attr – The attribute being modified.

• newvalue – The desired new value of the attribute.