GurobiError: Invalid data in vars array

回答済み

Yifan Wu

2023年04月10日 15:04

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Hi, 

I am trying to model my objective function using min_(). 

I got the error message:  Invalid data in vars array. I believe it is because of the M(1-I_{ij}). But I don't know how to fix it. 

My code is :

Thanks

関連

• Error
• General Constraints

0

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  Jaromił Najman

  • Gurobi Staff

  2023年04月13日 08:47

  Hi Yifan,

  As described in the documentation of the addGenConstrMin method, it only accepts single optimization variables as input. Thus, you have to introduce an auxiliary optimization variable and an equality constraint for every input of your \(\min\) function

  \(\texttt{ auxVar[i,j,m,n] = np.abs(m-i) + np.abs(n-j) + np.abs(k-i) + np.abs(l-j) + M*I[i,j]}\)

  You can then use the auxiliary variables as input for the \(\texttt{gp.min_}\) function.

  Best regards, 
  Jaromił

  0

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