Lukas Winkel
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Activity overview
Latest activity by Lukas Winkel-
Lukas Winkel commented,
Thank you for the reply, I will look into the callback!
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Lukas Winkel created a post,
Query Method Used for Automatic Method Parameter
AnsweredHello everyone,is there a way to query after the solve, which method was actually used, when the model parameter Method is set to "automatic"?Best,Lukas
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Lukas Winkel commented,
Hi Maliheh,thank you for the fast answer, the solution approach with the SolutionLimit set to 1 is perfectly feasible for my use case. Also thank you for explaining the problems with callbacks!Best...
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Lukas Winkel created a post,
Getting a first integer feasible point with callbacks
AnsweredHey,I am trying to get a first integer feasible point fast (or to be more precise, its objective value) and then terminate the optimization process and thought about doing that via a callback. Unfo...
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Lukas Winkel commented,
Thanks!
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Lukas Winkel commented,
Thank you for the fast reply, Jaromil!Updating Gurobi is a good idea. Curiously, the version was not the problem, but a parameter change I forgot about was the issue.While we are at it, do you mayb...
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Lukas Winkel commented,
Example 1:QP: https://seafile.rlp.net/f/7b9ccb57b96847bea7c9/Log: Gurobi Optimizer version 9.0.2 build v9.0.2rc0 (linux64)Optimize a model with 500 rows, 250 columns and 29984 nonzerosModel fingerp...
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Lukas Winkel created a post,
Numerical Issues When Adding Var Bounds
AnsweredHey everyone, I am currently solving a variety of similar QPs. For some of those QP I run into numerical troubles, when adding upper and lower bounds on the variables, which I can not explain. Here...
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Lukas Winkel commented,
Hi Sonja,sure, the code: from gurobipy import * m = Model("qp") throws: NameError: name 'Model' is not defined When using: from gurobipy import * print(dir(gurobipy)) to print the directo...
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Lukas Winkel created a post,
Model() not included in gurobipy
OngoingHey there, I'm using Gurobi8.1 in Anaconda (Spyder3.7 IPE) under an Academic License.When I'm trying to use the class Model(), the compiler throws a NameError and tells me, that Model is not define...