documentation gurobi_presolve function in matlab

Answered

Felix Preuschoff

• April 29, 2023 15:58

Hi everyone,

I am using Gurobi with Matlab. Unfortunately the callable function `gurobi_presolve(...)`. The function is undocumented in the reference manual and has no appearance in the matlab examples.

I tried calling "gurobi_presolve" before calling "gurobi" but appearantly "gurobi" did presolve anyway.

Is there any documentation about that function or what it does?

Best,
Felix

Related to

• MATLAB
• Presolve

0

• 

  Simranjit Kaur

  Gurobi Staff

  • May 01, 2023 04:33

  Hi Felix,

  Thanks for letting us know about the missing documentation.

  The function gurobi_presolve creates presolved version of the initial model. If you save the presolved model and optimize it separately, Gurobi will reapply presolve by default on this model. If this is not desired, you can switch off the Presolve parameter or limit the PrePasses parameter.

  You can read more about how presolve works in this article.

  Regards,

  Simran

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