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Search options user 3958
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In R, I regularly ompr::MILPModel for optimization. I adapt the below snippet to enable multiplication of a decision variable with two dimensions (e.g., x[i,j] ) by a numeric matrix of the same dime …
asked Nov 20 '20 by Ralph Asher
4
votes
1answer
I am looking for a book recommendation on the VRP and variants. I am encountering VRP-like problems more and more in my work and would appreciate a reference.
asked Feb 6 '21 by Ralph Asher
3
votes
1answer
I am familiar with how to use ompr::MIPModel but I am trying to learn how to use MILPModel to take advantage of the model build speed. A simplified version of my model is below. I have two decision va …
asked Aug 7 '20 by Ralph Asher
1
vote
Adding a follow-up on how to style matrix multiplication-type constraints and objective function values. This has been a major pain point for me, and now that I have a template, this will be a real p …
answered Sep 13 '20 by Ralph Asher
4
votes
1answer
Background: I have a set of ZIP codes (e.g., all of the state of Wisconsin), and am trying to figure out an optimization-based approach to identify a subset of these ZIP codes for a logistics service …
asked Dec 26 '20 by Ralph Asher