Need help with multiple indices and reading from a dataframe for model parameters

Awaiting user input

Mayukh Majumdar

June 01, 2023 17:36

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Hi

I am new to Gurobi Python interface and looking for suggestions for a modeling issue. I am running two optimization models (in sequence), where I am passing a dataframe from one function to another. The data in the dataframe will be used as a parameter in the next model. I am not sure if I am building the optimization model right. It would be great if I could get any suggestions. My current objective function is below. For two indices j and t, I have the following decision variable.

Xuj = model.addVars(j,T+1, vtype=GRB.CONTINUOUS, name="Xuj")

My objective function is below. 

obj =  a * gp.quicksum((Xuj[j,t]) for j in range (6) for t in range(0,T+1)) 
    + g * gp.quicksum((Yuj.iloc[j,t]) for j in range (6) for t in range(0,T+1))

Yuj is a parameter in the model from the dataframe passed from the previous function. 

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  Lennart Lahrs

  • Gurobi Staff

  June 02, 2023 08:49

  Hi Mayukh,
  
  Can you please provide a complete piece of code to reproduce your error? We have a tutorial on preparing a minimal reproducible example for cases like these.
  
  Best regards,
  Lennart

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