how can I get the value of auxiliary variables?

Answered

Yunxue Lu

July 25, 2022 12:35

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Here is my code:

m.addConstr( c <= (weights @ input).squeeze().tolist(),'c0')

where the weights and input are numpy.array() with shape of (1,10) and (10,1). several elements of input array involves the decision variable.

after solve the model, I want to know that how I can get the input array with the optimized variable?

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 16, 2025 23:31

  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

  August 06, 2022 01:27

  Hi Yunxue, 

  To access the values of decision variables in the current solution, you need to use the variable attribute X.

  More specifically, you can iterate through elements of the \(\texttt{input}\) array and if the element is a Gurobi Var object, you can then retrieve its value using the X attribute.

  Best regards,

  Maliheh

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