Jonas Grundler
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Latest activity by Jonas Grundler-
Jonas Grundler commented,
Okay, I see. Thanks a lot!
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Jonas Grundler commented,
Yes, I tried, but unfortunately it does not work. Do I have to use the 'column' attribute here? Or is there a more convenient way?
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Jonas Grundler commented,
Hi Marika, thanks, this helps!However, the new variables are not forced to fulfill the following constraint: m.addConstrs(quicksum(x[i,j] for j in second_set) >= 1 for i in first_set) How can I cha...
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Jonas Grundler created a post,
Adding new variables to existing model
AnsweredDear all, I am working on the following model: m = Model('Test')first_set = list(range(3))second_set = list(range(3))x = m.addVars(first_set, second_set, vtype=GRB.CONTINUOUS) #9y = m.addVars(secon...
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Jonas Grundler commented,
Yes, that helps! Thanks a lot! Best wishes,Jonas
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Jonas Grundler commented,
And another follow-up question: I read that there is no direct way to access shadow prices (constr.Pi) using the Gurobi multi-objective optimization. Do you know any way how to circumvent this issu...
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Jonas Grundler commented,
Hi Marika, the objective function is of the following form: The sigmas represent the individual objective weights, whereas LB and UB are lower and upper bounds respectively. How can I know access ...
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Jonas Grundler commented,
Dear Marika, thanks for your quick reply! I already read about your multiple objectives feature. However, as my individual objective terms are normalized, I would have to re-calculate the 'real-siz...
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Jonas Grundler created a post,
Accessing objective terms
AnsweredDear all, I am using a Python function which returns 'm', a gurobi.Model object. In a next step, I call m.optimize(). Afterwards, I can use m.objval, m.getVars(), etc. to access my results. However...