Questions tagged [coin-or]
For questions relating to the Computational Infrastructure for Operations Research (COIN-OR).
6
questions
16
votes
4answers
2k views
What are the advantages of commercial solvers like Gurobi or Xpress over open source solvers like COIN-OR or CVXPY?
I come from an ML background, and occasionally have to dive into the OR world. I am trying to figure out whether I need to purchase a commercial solver license for a certain problem set.
In the ML ...
4
votes
1answer
90 views
Deterministic termination criteria for CBC
I'm running CBC on problems for which not always an integer solution can be found in a given time, so the command line option sec 120 is set (2 minutes maximum). ...
3
votes
1answer
88 views
Manually indicate initial basis for coin-or lp solver CLP
I have a set partitioning formulation with each constraint being an equality constraint to meet the given demand (right-hand side of the constraint).
For each constraint, I have a slack and a surplus ...
8
votes
1answer
402 views
Creating a Continuous Decision Variable between 0 and 1 in Python-MIP Interface
This task appears to be harder than it seems to me.
I want to create a continuous variable $x \in [0,1]$.
To test this, I did use the open-source Python-MIP interface which uses the CBC-Solver out ...
8
votes
1answer
548 views
How to set a maximum time to improve a solution with Pyomo and CBC
In relation to using CBC via Pyomo:
I was wondering if anyone knew if it was possible to set a maximum allowed time to improve a solution, rather than a maximum total time. This way, if you've been ...
5
votes
2answers
255 views
Installing COIN-OR solvers in Ubuntu (Azure)
For a side project, I'm looking to install COIN-OR project solvers on a Microsoft Azure Ubuntu VM. (I will be running Pyomo optimization models on this VM as well; using NEOS isn't cutting it.) ...
