Panggah Prabawa

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Gurobi-versary
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Activity overview

Latest activity by Panggah Prabawa

  • Panggah Prabawa commented,

    1. Community
    2. Modeling
    3. Passing multiple variables across Python function/methods

    Hi, Ryuta, Sweet. Thank you for your explanation! Best, Panggah.

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    • Panggah Prabawa
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  • Panggah Prabawa commented,

    1. Community
    2. Modeling
    3. Passing multiple variables across Python function/methods

    Hi, Ryuta, It can be applicable too, however, I will apply the function iteratively so it may not be easy to write down all the variables that are going to be packed. Does Gurobi provide a way to a...

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  • Panggah Prabawa created a post,

    Passing multiple variables across Python function/methods

    Answered
    1. Community
    2. Modeling

    Hi all, I wonder if I can pass multiple/all variables across Python functions considering many variables to pass on so that they are accessible and optimized outside the function. For example: def ...

    • Panggah Prabawa
    • 2 followers
    • 4 comments
    • 1 vote

  • Panggah Prabawa commented,

    1. Community
    2. Modeling
    3. Treating Gurobi as a local solver?

    Hi Jaromił, Thank you for the information.Anyways, is it possible to set a starting point like a local solver does? Best, Panggah.

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  • Panggah Prabawa commented,

    1. Community
    2. Modeling
    3. Treating Gurobi as a local solver?

    Hi Jaromił, To compare with the previous example (problem A), I implemented another example (problem B) below: Both problems have the same log:"Continuous model is non-convex -- solving as a MIP" ...

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  • Panggah Prabawa commented,

    1. Community
    2. Modeling
    3. Treating Gurobi as a local solver?

    Hi, Jaromił. Thank you for your reply. For now, I have a continuous nonlinear problem with multiple bilinear terms. I believe that this problem may have multiple local optima. However, the Solution...

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  • Panggah Prabawa created a post,

    Treating Gurobi as a local solver?

    Answered
    1. Community
    2. Modeling

    Hi all, As Gurobi is a global solver, is it possible to make Gurobi solve a problem and stop when it finds a local optimum by e.g., adding model.Param? I intend to make an iterative algorithm using...

    • Panggah Prabawa
    • 2 followers
    • 7 comments
    • 1 vote

  • Panggah Prabawa created a post,

    Convex vs SOCP Constraint

    Answered
    1. Community
    2. Modeling

    Hello, I am constructing a problem which includes a convex constraint: \( l_{ij} * u_{i} \geq p_{ij}^2 + q_{i,j}^2 \) which I coded as follows (with additional dimension \( t \) ): Ohm_law = m.addC...

    • Panggah Prabawa
    • Edited
    • 2 followers
    • 1 comment
    • 1 vote

  • Panggah Prabawa commented,

    1. Community
    2. Modeling
    3. tupledict.prod() with partial dictionary key

    Thank you for your answers, Jaromil and Riley.I will test the creation speeds of those options. Very interesting.  

  • Panggah Prabawa commented,

    1. Community
    2. Modeling
    3. tupledict.prod() with partial dictionary key

    Thank you for your response. I know that is a way to do that.Let's say that the index is a tuple (i,j,t), where t < T.I maintain parameter coeff to have 2 key lengths to avoid iterating coeff over ...