Sander Mertens
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Latest activity by Sander Mertens-
Sander Mertens commented,
Thank you, works perfect!
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Sander Mertens created a post,
Retrieve a specific subset value of variables
AnsweredHello, Is there a way to retrieve the value of a subset from a specific variable within Gurobi?For instance, allot of X variables are created in the form of X[a,b,c,t]. After optimization, I want t...
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Sander Mertens created a post,
IP model takes too long to solve
AnsweredI have a pure integer problem which takes very long to solve (I don't know the exact time, but after times over 12 hours there was still no solution).The model has a size of:143,442 rows, 161,547 c...
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Sander Mertens commented,
Thank you for your clear answer, despite the mistakes in my post. The constraint finally seems to work!
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Sander Mertens commented,
My apologies, you're right. The additional condition for t can be dropped so that it the constraint must only hold for all j (except 12) and t:
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Sander Mertens commented,
First an multidict is created: proc_combo, costs = {(0, 0, 0): 5, (0, 1, 1): 10, (1, 1, 1): 15, (0, 2, 2): 20, (1, 2, 2): 25, (0, 3, 3): 30, (0, 4, 4): 35, (0, 5, 5): 40, (0, 6, 6): 45, (1, 6, 6): ...
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Sander Mertens created a post,
Unable to model constraint
AnsweredI've tried everything to add a constraint to my model, but I just can't seem to get it to work. The constraint I'm trying to add is: In my model, t is defined as a list of time points where the las...
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Sander Mertens commented,
If you don't mind, I have a additional question. As can be seen before, the X variables have four subsets. In my objective function I want to sum all the X variables together, with an exclusion of ...
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Sander Mertens commented,
Thank you!
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Sander Mertens created a post,
Dependent variables
AnsweredHi, I was wondering how dependent variables should be handled within Gurobi. For instance, the decision variable in the model is X_{t}. Another variable, S_{t} is dependent on the value of the deci...