Sander Mertens

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Recent activity by Sander Mertens Recent activity Votes
  • Retrieve a specific subset value of variables

    Answered

    Hello, Is there a way to retrieve the value of a subset from a specific variable within Gurobi?For instance, allot of X variables are created in the form of X[a,b,c,t]. After optimization, I want t...

  • IP model takes too long to solve

    Answered

    I have a pure integer problem which takes very long to solve (I don't know the exact time, but after times over 12 hours there was still no solution).The model has a size of:143,442 rows, 161,547 c...

  • Unable to model constraint

    Answered

    I've tried everything to add a constraint to my model, but I just can't seem to get it to work. The constraint I'm trying to add is: In my model, t is defined as a list of time points where the las...

  • Dependent variables

    Answered

    Hi, I was wondering how dependent variables should be handled within Gurobi. For instance, the decision variable in the model is X_{t}. Another variable, S_{t} is dependent on the value of the deci...

  • Keyerror in objective function

    Answered

    Currently I'm trying to solve my fist optimization problem with Gurobi, however I encountered the following keyerror after adding the objective function to the model: KeyError: ((0.0, 0.0, 0.0), 0...