Jose Alexander Vindel Garduno

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Activity overview

Latest activity by Jose Alexander Vindel Garduno
  • Jose Alexander Vindel Garduno commented,

    Hi Jonasz, Thanks so much for your answer It is actually the opposite, I've noticed that when building the linear constraints it takes quite a while (+1000 linear equations) so I wanted to have the...

  • Jose Alexander Vindel Garduno created a post,

    Different methods to solve a model

    Answered

    Hello, I am trying to write a piece of script with different methods to solve a problem. This problem has a set of constraints and variables that don't change but the methods do. Each method adds c...

  • Jose Alexander Vindel Garduno commented,

    Hello Jaromil,  No, I did not execute my script as administrator I ran it normally from the command terminal (windows). I will try to run it as an administrator. So, one can include a path in the m...

  • Jose Alexander Vindel Garduno commented,

    Hello Jonasz, Thanks for the tutorial, it is definitely a workaround I could work with. Hopefully, Gurobi staff can provide insight as I am quite sure I am not the only one who would like to save t...

  • Jose Alexander Vindel Garduno created a post,

    Writing LP to an specific location

    Answered

    Hello,  I am trying to save a .lp file of the model I am working on. However, I would like to save it in a different directory. My plan is to have a folder where the scripts are and another folder ...

  • Jose Alexander Vindel Garduno commented,

    Hello Maliheh, Thanks for your response. Basically, the only way to update the objective bound would be through a cut that cuts off that solution? A similar question if one wants to update the incu...

  • Jose Alexander Vindel Garduno created a post,

    Set ObjBound

    Answered

    Hello,  Just a question, can you update the ObjBound in a MIPSOL? I was reading the documentation and came across  Var.setAttr(GRB.Attr.UB, 0.0) My question is can I do something like this? def laz...

  • Jose Alexander Vindel Garduno commented,

    Hello Jonathan, I came across your solution, I find it quite useful. I would like to ask you, in your script. the variable: model._IncObjVal is where you update the value of the incumbent. Is that ...

  • Jose Alexander Vindel Garduno commented,

    Hello Irem, I am also dealing with binary variables and this is what I do, I use binary variables to solve a knapsack problem where when \(y_s = 0\) is not in the knapsack. And get access to the va...

  • Jose Alexander Vindel Garduno commented,

    Sorry, such a mistake I typed wrong when defining v in \(addVars\) it had the wrong length. Now I managed to create the lp file that I wanted. Coming back to the first question, after I dropped the...