GRBSOS#
- GRBSOS#
Gurobi SOS constraint object. SOS constraints are always associated with a particular model. You create an SOS object by adding an SOS constraint to a model (using
GRBModel.AddSOS
), rather than by using aGRBSOS
constructor. Similarly, SOS constraints are removed using theGRBModel.Remove
method.An SOS constraint can be of type 1 or 2 (
GRB.SOS_TYPE1
orGRB.SOS_TYPE2
). A type 1 SOS constraint is a set of variables where at most one variable in the set may take a value other than zero. A type 2 SOS constraint is an ordered set of variables where at most two variables in the set may take non-zero values. If two take non-zero values, they must be contiguous in the ordered set.SOS constraint objects have one attribute, IISSOS, which can be queried with the
GRBSOS.Get
method.- int Get(GRB.IntAttr attr)#
Query the value of an SOS attribute.
- Parameters:
attr – The attribute being queried.
- Returns:
The current value of the requested attribute.
- void Set(GRB.IntAttr attr, int newvalue)#
Set the value of an SOS attribute.
- Parameters:
attr – The attribute being modified.
newvalue – The desired new value of the attribute.