Michael Mell
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Activity overview
Latest activity by Michael Mell-
Michael Mell created a post,
How to query GRBModel for pending operations
Awaiting user inputGRBModel in the Java API has the update method: GRBModel.update() which according to the documentation is used to (https://www.gurobi.com/documentation/8.1/refman/java_grbmodel_update.html): Proce...
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Michael Mell created a post,
How to add a binary variable without objective value using the Java API
AnsweredDear all, my question is how to create binary variable in Gurobi without assigning a cost/objective value to it. I use the Java API method `GRBModel.addVar(...)` to add variables to my model; this ...
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Michael Mell commented,
Dear Jaromil, to follow up on this issue: I was able to solve it. Indeed, the reason was the duplication of variable names. There was a bug in the code that caused this. Best regards and thank you,...
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Michael Mell created a post,
Gurobi stops storing variable names to the MPS file for large models, which breaks my use case - uses place holder names instead
AnsweredDear all, In my application I use the names of the Gurobi variables and constraints to match them to objects in my program code, which I then use to display them to the user for interaction in a GU...
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Michael Mell commented,
Hi Matthias, that clears my last doubts then. Thank you! It is too bad (and a bit surprising) that you cannot store the full optimizer state (as a type of snapshot of system memory) and load it fro...
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Michael Mell commented,
Dear Matthias, dear Runqiu, thank you for your replies. They have helped clarify things for me. @Matthias Miltenberger: I have two more questions and then hopefully I should be happy :) ... First l...
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Michael Mell commented,
Hi Matthias, thank you for the quick reply. So I understand correctly, that the call to model.optimize() is unavoidable even when loading the solution from disk? But then how can I make sure that t...
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Michael Mell created a post,
How to save and load a Gurobi model and solution without rerunning the model after loading
AnsweredDear Matthias Miltenberger I am addressing this post to you directly, since you recently answered a very similar post here, which unfortunately did not help me ... I need to save and load a model a...
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Michael Mell created a post,
What does Gurobi do for different values of the NumericFocus parameter?
AnsweredTL;DRI need to understand what exactly Gurobi does for the different values of NumericFocus. I would be very grateful for any explanations or pointers to relevant documentation! I hope that underst...
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Michael Mell commented,
Hi Silke, thanks for the answer. I am not sure, what you mean by coefficient statistics. Is it this(?): Matrix range [1e+00, 2e+01]Objective range [3e-04, 1e+05]Bounds range [1e+00, 1e+00]RHS range...