Multi-Objective Function

Answered

Aziz Ammar

• April 30, 2019 14:53

Hello,

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I'm currently trying to implement a dynamic optimization code (with Multi-Objective function) with Gurobi, except that it unfortunately works!​

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No concrete examples can be found in Gurobi's documentation. I don't know who to contact since I didn't find anything on google.​

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Please enlighten me further on this subject!​

 

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Thank you very much.​

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• Official comment

  

  Simranjit Kaur

  Gurobi Staff

  • December 06, 2024 00:59

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
• 

  Gwyneth Butera

  Gurobi Staff

  • April 30, 2019 15:12

  Have you had a chance to look at the example http://www.gurobi.com/documentation/8.1/examples/multiobj_py.html ?

      # Set and configure i-th objective
      for i in Subsets:
          objn = sum(Elem[k]*Set[i][k] for k in range(len(Elem)))
          model.setObjectiveN(objn, i, SetObjPriority[i], SetObjWeight[i],
                              1.0 + i, 0.01, 'Set' + str(i))
  

   

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• 

  Aziz Ammar

  • April 30, 2019 15:36

  

  

  

  I don't know how to introduce "setObjectiveN(____)" in my code.

  I tried as much as I did in the capture I shared but without result.

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• 

  Jakob Schelbert

  • May 02, 2019 14:27

  

  

  Hi Aziz,

  See the documentation here: http://www.gurobi.com/documentation/8.1/refman/py_model_setobjectiven.html

  You do not have to specify the sense of the objective (you can set the overall sense of the model http://www.gurobi.com/documentation/8.1/refman/modelsense.html#attr:ModelSense).

  You probably want to set

  m.setObjectiveN(DEUD1[0] * u3 + DEUD2 * v3, index=0, priority=2)
  m.setObjectiveN(FRAF1[0] * x3 + aaaa * y3 + FRAF3[0] * z3, index=1, priority=1)

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