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GRBaddvar
| int | GRBaddvar ( | GRBmodel | *model, |
| int | numnz, | ||
| int | *vind, | ||
| double | *vval, | ||
| double | obj, | ||
| double | lb, | ||
| double | ub, | ||
| char | vtype, | ||
| const char | *varname ) |
Add a new variable to an existing model. Note that the new variable 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 variable. 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 variable should be added.
numnz: The number of non-zero coefficients in the new column.
vind: Constraint indices associated with non-zero values for the new variable.
vval: Numerical values associated with non-zero values for the new variable.
obj: Objective coefficient for the new variable.
lb: Lower bound for the new variable.
ub: Upper bound for the new variable.
vtype: Type for the new variable. Options are GRB_CONTINUOUS, GRB_BINARY, GRB_INTEGER, GRB_SEMICONT, or GRB_SEMIINT.
varname: Name for the new variable. This argument can be NULL, in which case the variable is given a default name.
Example usage:
int ind[] = {1, 3, 4};
double val[] = {1.0, 1.0, 1.0};
error = GRBaddvar(model, 3, ind, val, 1.0, 0.0, GRB_INFINITY,
GRB_CONTINUOUS, "New");
