Result analysis of a MIP Problem

Answered

wentao zou

October 07, 2022 03:29

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Hello everyone,

I have a large-scale MIP proble which can have 300 thousand interger variables, 400 thousand continous variables and 200 thousand constraints. it runs well and i can get the result. However, I want to figure out why the result acts like this. For example, some interger variables are 1 and some are 0. I want to know what constraints affect this interger variables. I can do it myself if it is a small MIP proble. For a large one, is there an efficient way?

I will appreciate if there is any idea.

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 16, 2025 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.
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  Maliheh Aramon

  • Gurobi Staff

  October 08, 2022 01:07

  Hi Wentao,

  You can use the method Model.getCol(var) to get a Column object capturing the constraints that the variable \(\texttt{var}\) participates in.

  Hope this helps.

  Best regards,

  Maliheh

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