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Next: GRBModel.AddGenConstrPWL() Up: GRBModel.AddGenConstrXxx() Previous: GRBModel.AddGenConstrNorm()


GRBModel.AddGenConstrIndicator()

Add a new general constraint of type GRB.GENCONSTR_INDICATOR to a model.

An INDICATOR constraint <span>$</span>z = f \rightarrow a^Tx \leq b<span>$</span> states that if the binary indicator variable <span>$</span>z<span>$</span> is equal to <span>$</span>f<span>$</span>, where <span>$</span>f \in \{0,1\}<span>$</span>, then the linear constraint <span>$</span>a^Tx \leq b<span>$</span> should hold. On the other hand, if <span>$</span>z = 1-f<span>$</span>, the linear constraint may be violated. The sense of the linear constraint can also be specified to be <span>$</span>=<span>$</span> or <span>$</span>\geq<span>$</span>.

Note that the indicator variable <span>$</span>z<span>$</span> of a constraint will be forced to be binary, independent of how it was created.

Multiple signatures are available.

GRBGenConstr AddGenConstrIndicator ( GRBVar binvar,
int binval,
GRBLinExpr expr,
char sense,
double rhs,
string name )

Arguments:

binvar: The binary indicator variable.

binval: The value for the binary indicator variable that would force the linear constraint to be satisfied (<span>$</span>0<span>$</span> or <span>$</span>1<span>$</span>).

expr: Left-hand side expression for the linear constraint triggered by the indicator.

sense: Sense for the linear constraint. Options are GRB.LESS_EQUAL, GRB.EQUAL, or GRB.GREATER_EQUAL.

rhs: Right-hand side value for the linear constraint.

name: Name for the new general constraint.

Return value:

New general constraint.

GRBGenConstr AddGenConstrIndicator ( GRBVar binvar,
int binval,
GRBTempConstr constr,
string name )

Arguments:

binvar: The binary indicator variable.

binval: The value for the binary indicator variable that would force the linear constraint to be satisfied (<span>$</span>0<span>$</span> or <span>$</span>1<span>$</span>).

constr: Temporary constraint object defining the linear constraint that is triggered by the indicator. The temporary constraint object is created using an overloaded comparison operator. See GRBTempConstr for more information.

name: Name for the new general constraint.

Return value:

New general constraint.


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Next: GRBModel.AddGenConstrPWL() Up: GRBModel.AddGenConstrXxx() Previous: GRBModel.AddGenConstrNorm()