Lorenz Wagner

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Lorenz Wagnerさんの最近のアクティビティ
  • Lorenz Wagnerさんが投稿を作成しました:

    Solve scheduling model using a greedy heurisitc

    回答済み

    I have the following scheduling problem. Relatively simple and not very complex (only serves as an example). The indexes are \(I\) worker, \(T\) days and \(J\) shift. The decision variable is \(x_{...

  • Lorenz Wagnerさんが投稿を作成しました:

    Technical questions regarding binary variables

    回答済み

    Hello, I have a purely technical question about Gurobi. Suppose I have the variable \(y_{ijk} \in [0;1]\) . Now I want to define a binary variable \(x_{ijk}\)  that takes the value 1 if \(y_{ijk}=1...

  • Lorenz Wagnerさんが投稿を作成しました:

    Weird incumbent behavior

    回答済み

    Hello, I have the following problem. I am trying to evaluate the lowe bound and the incumbent via the log of my model and use the glt.get_dataframe() command to create a DataFrame. Unfortunately I ...

  • Lorenz Wagnerさんがコメントを作成しました:

    Thank you so much!

  • Lorenz Wagnerさんがコメントを作成しました:

    Riley Clement That would be perfect, as I prefer matplotlib too. Thank you so much 

  • Lorenz Wagnerさんがコメントを作成しました:

    Hi Riley Clement , thank you. It works now. The plot can be output. But unfortunately, the scales are wrong. In the initial plot above, the values of the objective function are shown on the left, b...

  • Lorenz Wagnerさんがコメントを作成しました:

    Hi Riley Clement, thanks. Did the trick. I have now used your MIP example and tried to create the plot for it (even though you probably won't see anything there). I have followed this video. I ende...

  • Lorenz Wagnerさんがコメントを作成しました:

    Hi Riley Clement. Thank you for your answer. I tried using gurobi-logtools, but i always get this error: Traceback (most recent call last): File "G:\M..\Model.py", line 502, in <module>    summary...

  • Lorenz Wagnerさんが投稿を作成しました:

    How to implement an optimality gap plot?

    回答済み

    Hi, I came across this plot earlier and was wondering what exactly it says and how to implement it with Gurobi?I think with a callback function (as seen here), but I don't know which values I have ...

  • Lorenz Wagnerさんがコメントを作成しました:

    Hi Riley Clement thanks a lot. My guess would be something like this. for i in I:    for t in range(2, len(T) + 1):        m.addConstr(n[i, t] == n_h[i, t] - e[i, t] + b[i, t])        m.addConstr(n...