adding constraint

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Farzana Chowdhury

• 2020年11月29日 01:09
• 編集済み

Hello,

I want to add the following constraint in gurobi python

I tried the following code and having a keyerror. 

for (i,j) in road_node:
      for t in range(1,n_time_horizon+1):
           m.addConstr(sum([x[v,i,u,j,u+fftt[(i,j)]] for v in vehicle_list for u in range(1,n_time_horizon+1) if u>=0 and u<=t]) - sum([x[v,j,u,i,u+fftt[(j,i)]] for v in vehicle_list for (j,i) in road_node for u in range(1,n_time_horizon+1) if u>=0 and u<=t]) <= l[(i,j)],name = "cont_4")

Could anyone please help me with this like where am i doing mistake?

 

 

 

-1

• 正式なコメント

  

  Simranjit Kaur

  Gurobi Staff

  • 2024年12月06日 00:39

  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?.
• 

  Jaromił Najman

  Gurobi Staff

  • 2020年12月01日 12:00
  • 編集済み

  Hi Farzana,

  Your code is not self-contained making it very hard to help you. In particular, could you provide the definition of \(\texttt{vehicle_list, n_time_horizon, road_node,}\) and \(\texttt{fftt}\).

  Best regards,
  Jaromił

  0
• 

  Jaromił Najman

  Gurobi Staff

  • 2020年12月03日 08:24

  This post is continued in https://support.gurobi.com/hc/en-us/community/posts/360075061571

  0

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