How to create input variable to my Vehicle platooning problem?

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John Raphy Karippery

2021年01月11日 20:24

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Hello, 
I'm new to Gurobi and not a really good programmer. I need to model a Multi-objective vehicle platooning problem. I created a mathematical model. I need to verify my model with Gurobi.
After reading the documentation I am so confused .

How to create Sets of variables in Gurobi using multidict ?

I do something like that. 

location,cost = gp.multidict({("A","B"): 12,("C","A"): 10,("A","D"): 12,("D","B"): 15,("F","B"): 20, ("C","D"): 17,("F","C"): 19,
("C","E"): 15, ("F","E"): 11})
 

How can I add time to each location? for example from A to B it take 5 min 20 second?
  

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  Simranjit Kaur

  • Gurobi Staff

  2025年06月23日 03:02 編集済み

  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?.
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  Jaromił Najman

  • Gurobi Staff

  2021年01月14日 12:13 編集済み

  Hi John,

  You can add a time by extending the multidict as

  location,cost,time = gp.multidict({
  ("A","B"): [12, 320],
  ("C","A"): [10, 600],
  ("A","D"): [12, 120],
  ("D","B"): [15, 450],
  ("F","B"): [20, 1200],
  ("C","D"): [17, 720],
  ("F","C"): [19, 240],
  ("C","E"): [15, 300],
  ("F","E"): [11, 360]})

  The keys of the multidict will be stored in location, the first entries of the lists will be stored in cost, and the second entries of the lists will be stored in time. Please, have a look at the documentation of multidict for more details and the examples diet.py and netflow.py for applications.

  Best regards,
  Jaromił

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