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GRBaddconstr
| int | GRBaddconstr ( | GRBmodel | *model, |
| int | numnz, | ||
| int | *cind, | ||
| double | *cval, | ||
| char | sense, | ||
| double | rhs, | ||
| const char | *constrname ) |
Add a new constraint to an existing model. Note that the new constraint won't actually be added until the next call to GRBoptimize or GRBupdatemodel.
Return value:
A non-zero return value indicates that a problem occurred while adding the constraint. Refer to the Error Code table for a list of possible return values. Details on the error can be obtained by calling GRBgeterrormsg.
Arguments:
model: The model to which the new constraint should be added.
numnz: The number of non-zero coefficients in the new constraint.
cind: Variable indices for non-zero values in the new constraint.
cval: Numerical values for non-zero values in the new constraint.
sense: Sense for the new constraint. Options are GRB_LESS_EQUAL, GRB_EQUAL, or GRB_GREATER_EQUAL.
rhs: Right-hand-side value for the new constraint.
constrname: Name for the new constraint. This argument can be NULL, in which case the constraint is given a default name.
Example usage:
int ind[] = {1, 3, 4};
double val[] = {1.0, 2.0, 1.0};
/* x1 + 2 x3 + x4 = 1 */
error = GRBaddconstr(model, 3, ind, val, GRB_EQUAL, 1.0, "New");
