Try our new documentation site (beta).


Model.addGenConstrAbs()

addGenConstrAbs ( resvar, argvar, name="" )

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

An ABS constraint <span>$</span>r = \mbox{abs}\{x\}<span>$</span> states that the resultant variable <span>$</span>r<span>$</span> should be equal to the absolute value of the argument variable <span>$</span>x<span>$</span>.

You can also add an ABS constraint using the abs_ function.

Arguments:

resvar (Var): The variable whose value will be to equal the absolute value of the argument variable.

argvar (Var): The variable for which the absolute value will be taken.

name (string, optional): Name for the new general constraint. Note that name will be stored as an ASCII string. Thus, a name like 'A<span>$</span>{\rightarrow}<span>$</span>B' will produce an error, because '<span>$</span>{\rightarrow}<span>$</span>' can not be represented as an ASCII character. Note also that names that contain spaces are strongly discouraged, because they can't be written to LP format files.

Example usage:

  # x5 = abs(x1)
  model.addGenConstrAbs(x5, x1, "absconstr")

  # overloaded form
  model.addConstr(x5 == abs_(x1), name="absconstr")

Try Gurobi for Free

Choose the evaluation license that fits you best, and start working with our Expert Team for technical guidance and support.

Evaluation License
Get a free, full-featured license of the Gurobi Optimizer to experience the performance, support, benchmarking and tuning services we provide as part of our product offering.
Academic License
Gurobi supports the teaching and use of optimization within academic institutions. We offer free, full-featured copies of Gurobi for use in class, and for research.
Cloud Trial

Request free trial hours, so you can see how quickly and easily a model can be solved on the cloud.

Search

Gurobi Optimization