Benedicte Rimmereid
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Latest activity by Benedicte Rimmereid-
Benedicte Rimmereid created a post,
Dual values of MIP
AnsweredHi, We are investigating dual variables from MIP problems by first solving an original MIP problem, then fixing the solution of the integer variables and solving a corresponding linear program. We ...
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Benedicte Rimmereid created a post,
Retriving dual values from relaxed MIP
AnsweredHi, I have defined a MIP model that solves a unit-commitment problem. I have first tried the fixed()-method to retrieve the dual values. Now, I want to do the same through relaxing the binary mode...
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Benedicte Rimmereid commented,
Mhm I see, Thank you so much for the help.
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Benedicte Rimmereid commented,
Yes, but not when I add SARHSUp :)
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Benedicte Rimmereid commented,
https://drive.google.com/file/d/1UBCxGKIfO57T29zK4FCHM5cI4xnkB5nl/view?usp=sharing Thank you! So to be clear, my end goal is to retrieve the SARHSUp/down-attribute
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Benedicte Rimmereid commented,
Mhm, very wierd: I tried this: fixed = model.fixed() fixed.params.QCPDual = 1 # TODO: back to 0 quadratic_constraints = fixed.getQConstrs() fixed.params.NonConvex = 1 fixed.update() fixed.opt...
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Benedicte Rimmereid commented,
Ah okay :) Gurobi 11.0.0 (win64) logging started Tue Apr 16 14:54:47 2024 Set parameter LogFile to value "gurobi_log_test.txt"Set parameter QCPDual to value 1Gurobi Optimizer version 11.0.0 build v...
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Benedicte Rimmereid commented,
(11,0,0) :)
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Benedicte Rimmereid commented,
Mhm, that results in: AttributeError: Unable to retrieve attribute 'Pi'
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Benedicte Rimmereid commented,
Yes, I have tried that :/