How to get a Dual variable for a particular primal constraint

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Shri Harshini Shanmugam

2022年06月27日 07:10

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How to get the dual variable for a particular primal constraint using Pi in gurobi

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  Simranjit Kaur

  • Gurobi Staff

  2025年11月16日 23:33

  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

  2022年06月28日 20:54

  Hi Shri,

  Assuming the primal constraint is linear, you can first access the specific constraint given its name by the method Model.getConstrByName() and then retrieve its dual using the attribute Pi. In case the constraint is quadratic, its dual can be retrieved using the attribute QCPi.

   Best regards,

  Maliheh

   

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