FeasRelax Model Relationships

Answered

Matthew Chamberlain

June 04, 2025 14:10

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In short, my request would be to have FeasRelax associate the new variables and constraints through attributes with the constraints/variables from which they are derived.

The reason this would be helpful is that, currently, I search through the names of my variables to find the ones relevant to the relaxation and my specific results. However, since I already have the other constraints and variables in tupledicts, it would be simple to access these new modifications through the original variables and constraints.

I am not sure how difficult/easy this might be, but it would be super helpful for anyone seeking to provide FeasRelax results into a structured data model or UI.

Related to

• FeasRelax

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  Matthew Chamberlain

  June 04, 2025 14:11

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  An example of this might be:

  model.FeasRelax(myVars,myWeights)

  Where you could access LB and UB relaxation variables through:

  myVars[0].LBRelaxValue

  I realize these aren't the current interfaces, but this is a general example.

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  Riley Clement

  • Gurobi Staff

  June 10, 2025 09:01

  Hi Matthew,

  It's a good idea.  I have been thinking about something similar, perhaps an open-source Python package to make analysis of feasrelax models easier for people who are not familiar with analysis in Python.

  I'll add your suggestion to our product backlog and I'll update you of any progress made!

  Thanks for the feedback.

  Cheers,
  Riley

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