Find minimal between Gurobi expression and one value

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ALESSANDRA VIEIRA

2022年10月10日 14:53

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Dear Folks,

I am using Gurobi with C++ in VS.

I need to choose a value for one Gurobi expression between zero and another Gurobi expression that can have a negative value as result, the latter contains one Gurobi variable, which was the way to make Optimization influence in this decision.

I tried two approaches, but both were not accepted ( I am not sure if this syntax fits C++): 

GRBLinExpr *genCH= new GRBLinExpr[T];

GRBQuadExpr savings_bat = 0;

for (t = 0; t < T; t++) {

      for (gen = 0; gen < n; gen++) {

          genCH[t] +=- Pp[gen][t];

          model.addConstr(savings_bat,min_(genCH[t], 0));      //Approach 1 

         savings_bat = model.addGenConstrMin(genCH[t], 0, t, "mincnstr");      //Approach 2

      }

}

 

I have already read these two articles :

https://www.gurobi.com/documentation/9.5/refman/py_min_.html ( just available for Python, ?);

https://www.gurobi.com/documentation/9.5/refman/py_model_agc_min.html#pythonmethod:Model.addGenConstrMin 

Thanks in advance.

BR,

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• 正式なコメント

  

  Simranjit Kaur

  • Gurobi Staff

  2025年11月16日 23:27

  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 try Gurobot, our chatbot interface offering instant, expert-level support.
• 

  Jaromił Najman

  • Gurobi Staff

  2022年10月11日 08:34

  You are using the Python documentation, which is not compatible with C++. You should have a look at the C++ documentation of the addGenConstrMin method. The genconstr_c++ and workforce5_c++ examples show how to use the addGenConstrMin method.

  Best regards, 
  Jaromił

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