Eli Towle

Hi Robert, I'll assume you have defined A and B to be the respective index sets, and have a tupledict x that maps those indices to the respective Var objects, e.g., x = model.addVars(A, B) Then you...

Hi Han, You can simply create a new list that stores the variable's values, then add that list to the zip() function. Building on your code, this looks like: var_names = []var_values = []for var in...

Hi Bradley, As you noticed, you need to use the X attributes of Var objects to retrieve their values after optimizing. If you don't use this attribute, you are instead comparing the Python objects ...

Hi Fan, The MIPNODE callback is called once for each cut pass that occurs at the root node. This is described in more detail in the callback codes documentation. I hope this helps. Thanks! Eli

Hi Suhas, The scipy.optimize.newton method finds a zero of the given function. This is different from what is meant by the optimization problem in your code. As written, the goal of your optimizati...

Hi Vaibhav, Okay, thanks for the clarification. With (1), there are still variables in the constraint, because the Vpredicted linear expression includes the Rl, Rm, and Rh variables. It seems that ...

Hi Vaibhav, First, I'll clarify a few general concepts related to optimization. The line vulvar=m.addVars(len(Vul), vtype=GRB.CONTINUOUS, obj=Vul,name="vul") adds a number of nonnegative continuous...

The norm general constraint was not added until Gurobi version 9.5. Please upgrade your Python version (3.6 is end-of-life and not supported by recent versions of Gurobi), then upgrade to the lates...

Gurobi does not modify the model as defined by the user. Variables that are added to the model but are not used in the constraints/objective appear in the objective function of the LP file with a \...

Hi Lin, You can disable console output by setting the LogToConsole parameter to 0. To additionally disable output to a logfile, use the LogFile or OutputFlag parameters. Thanks, Eli