GRBQConstr#
-
class GRBQConstr#
Gurobi quadratic constraint object. Quadratic constraints are always associated with a particular model. You create a quadratic constraint object by adding a constraint to a model (using
GRBModel::addQConstr
), rather than by using aGRBQConstr
constructor.The methods on quadratic constraint objects are used to get and set quadratic constraint attributes. For example, quadratic constraint right-hand sides can be queried by calling
get
(GRB_DoubleAttr_QCRHS
). Note, however, that it is generally more efficient to query attributes for a set of constraints at once. This is done using the attribute query method on theGRBModel
object (GRBModel::get
).-
char get(GRB_CharAttr attr)#
Query the value of a char-valued quadratic constraint attribute.
- Parameters:
attr – The attribute being queried.
- Returns:
The current value of the requested attribute.
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double get(GRB_DoubleAttr attr)#
Query the value of a double-valued quadratic constraint attribute.
- Parameters:
attr – The attribute being queried.
- Returns:
The current value of the requested attribute.
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int get(GRB_IntAttr attr)#
Query the value of an int-valued quadratic constraint attribute.
- Parameters:
attr – The attribute being queried.
- Returns:
The current value of the requested attribute.
-
string get(GRB_StringAttr attr)#
Query the value of a string-valued quadratic constraint attribute.
- Parameters:
attr – The attribute being queried.
- Returns:
The current value of the requested attribute.
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void set(GRB_CharAttr attr, char newvalue)#
Set the value of a char-valued quadratic constraint attribute.
- Parameters:
attr – The attribute being modified.
newvalue – The desired new value of the attribute.
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void set(GRB_DoubleAttr attr, double newvalue)#
Set the value of a double-valued quadratic constraint attribute.
- Parameters:
attr – The attribute being modified.
newvalue – The desired new value of the attribute.
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void set(GRB_IntAttr attr, int newvalue)#
Set the value of an int-valued quadratic constraint attribute.
- Parameters:
attr – The attribute being modified.
newvalue – The desired new value of the attribute.
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void set(GRB_StringAttr attr, const string &newvalue)#
Set the value of a string-valued quadratic constraint attribute.
- Parameters:
attr – The attribute being modified.
newvalue – The desired new value of the attribute.
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char get(GRB_CharAttr attr)#