# Questions tagged [julia]

For questions about solving Operations Research problems using the Julia programming language.

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### How to generate random bounded polytope by MATLAB defined by Ax=b, x≥0

How can one create a random bounded polytope in MATLAB, specified by the conditions $‎\lbrace‎x:~ Ax = b,~ x \geq 0‎\rbrace‎$
52 views

### Parameter Tuning Tool in Gurobi using Julia

I need to solve a hard MIP model using Gurobi. There is a tool to set the best parameters combination to solve this problem called "Parameter Tunning". How can I find parameter tuning using ...
47 views

### Are quadratic multi-stage optimization problems with quadratic constraints solvable by stochastic dual dynamic programming and SDDP.jl?

I have a program with quadratic objective and constraints, and wanna utilize sddp.jl package in julia for solution.
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### How can I handle a constraint on a terminal state variable while avoiding infeasibility during SDDP.jl training process?

I want to solve a multi-stage optimization problem using SDDP.jl in which I am having hard time using constraints on state variables at the termination.
36 views

### At the start of the execution of SDDP.jl, when there is no value approximation & terminal states available, what cost-to-go estimation is used?

I am using SDDP.jl for my research and want to know that at the very start of the execution, when there is no value function initialization and terminal state (for backward recursion), how cost-to-go ...
30 views

### How do I convert an SDDP.State object into a number or tuple in SDDP.jl?

I want to collect evaluation data and for it I need to collect data in numbers not SDDP.state objects, so how can I do that in SDDP.jl.
57 views

### Can I use continuous probability distributions when creating an SDDP.jl model?

I am using SDDP.jl for my research project and want to use continuous distribution, can I do so?
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### How can I write the output stream of SDDP.jl into an excel file?

I am using SDDP.jl for my research project in which I am developing a state-of-the-art actor critic algorithm which I am going to benchmark with SDDP but for it I need to plot graphs which require ...
217 views

### Randomly constructing a bounded ellipsoid

In a project, I am working with constraints of the following type $$\frac{1}{2}{x}^\top Q x + q^\top x + q_0 \leq 0$$ where I randomly generate the data by (randn...
• 4,010
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### How to set an objective to minimize the variance in ratio of allocation

I am trying to write a model where I have to distribute fractions of rent from properties to loans. The objective is to distribute the rents as equally as possible given the loan balance. Say there ...
1 vote
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1k views

### Julia JuMP successive optimization

I am using Julia's JuMP package to solve a cutting-plane method. Namely, I solve a sub-problem, find the most-violated constraint in the master problem, add that to ...
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### Trouble implementing a line-search algorithm

I am trying to implement a simple line-search algorithm in Julia. I am new to Julia programming, so I am learning it on the go. I'd like to ask for some help, if possible, to correct an error while ...
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### Is JuMPeR good enough for Robust Optimization problem?

I'm a graduate student studying Robust Optimization (RO). So far, I've been studied the theoretic point of RO, and now I am looking for an actual tool for solving RO problems, both for practice and ...
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