Access starting solution variables

Answered

Niccolò Bulgarini

July 29, 2019 09:07

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Hi all,

I'm using gurobipy and am setting starting values for some variables by using the .Start attribute. The initial solution is then correctly loaded.

After the optimization is done, how can I retrieve the values for all the variables related to the starting solution?

Maybe with a callback?

Or maybe it's possible to access all the solutions found? (it seems that the starting solution appears within the 'Solution count' list)

Thanks!

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  December 06, 2024 00:55

  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 why not try our AI Gurobot?.
• 

  Greg Glockner

  • Gurobi Staff

  July 29, 2019 15:51

  Try something like the following:

  m.optimize()
  for v in m.getVars():
    if v.Start != GRB.UNDEFINED:
      print('%s start %f, optimized %f' % (v.VarName, v.Start, v.X))

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