JuMP is a domain-specific modeling language for mathematical programming embedded in the Julia language.
JuMP is a domain-specific modeling language for mathematical programming embedded in the Julia language.
Questions tagged [julia-jump]
362 questions
2
votes
1 answer
Julia - Understanding JuMP Gurobi outputs
I am often using Gurobi with JuMP and I noticed that there are still parts of its outputs that I don't understand. Unless it is documented somewhere and the link would be most welcome, could you help understand the following? :)
Found heuristic…
JKHA
- 1,800
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2
votes
1 answer
Julia : use dictionary value in objective function?
I’m trying to be able to use values put in a Dictionary to weight the variables that are going to be minimized in a JuMP objective function.
The dictionnary is implemented as follow :
Dicopond = Dict(0=> 1, 1 => 2, 2 => 4, 3 => 8, 4 => 16, 5 => 32,…
rox
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- 2
2
votes
1 answer
Julia JuMP StackOverflow Error when defining a constraint on linear matrix inequalities
I was inspired by this post to switch from MATLAB's LMI toolbox to a Julia implementation and I tried to adapt the suggested script in the post to a problem I am trying to solve. However, I have failed to do this, consistently causing Julia to crash…
Will_sharp
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2
votes
1 answer
How to use VariableRef as indices in Julia JuMP
In Julia when I do:
model = Model();
set_optimizer(model, Cbc.Optimizer);
N=11;
model = Model();
set_optimizer(model, Cbc.Optimizer);
@variable(model, X[1:N,1:N,1:N], Bin);
@variable(model, 1<=K<=10, Int);
for k in K
@constraint(model,…
Ali Zoghi
- 21
- 1
2
votes
1 answer
Julia JuMP - `max` in the goal function Error: No method matching isless
There is a error in my code, can anyone help me please?
My code:
function funP(u, τ::Float64)
w = (τ*max(u, 0)) + ((1-τ)*max(-u, 0))
return w
end
τ = 0.2
modelquant = Model(with_optimizer(OSQP.Optimizer))
@variable(modelquant,…
rafael silva
- 21
- 1
2
votes
2 answers
Compact way to save JuMP optimization results in DataFrames
I would like to save all my variables and dual variables of my finished lp-optimization in an efficient manner. My current solution works, but is neither elegant nor suited for larger optimization programs with many variables and constraints because…
werderneo
- 41
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2
votes
1 answer
What do multiple objective functions mean in Julia jump?
I have multiple objective functions for the same model in Julia JuMP created using an @optimize in a for loop. What does it mean to have multiple objective functions in Julia? What objective is minimized, or is it that all the objectives are…
zendevil
- 899
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2
votes
1 answer
Julia: How to introduce binary integers for mixed integers optimization problems with JuMP?
Problem description
I am trying to do a mixed-integer optimization for a "Unit Commitment" problem in Julia with Jump. But JuMP expects my introduction of the unit activation variable, x[1:N], to be a number and not a variable. However, the unit…
DisabledWhale
- 771
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2
votes
2 answers
Loop over subset of variables in JuMP constraint
I am trying to implement an arc-flow problem where I have a set of arcs in an array. Each arc is a custom data structure composed of from/to nodes. I want to add a constraint where I only include the arcs that go from a specific node (1), something…
Berni
- 93
- 10
2
votes
2 answers
LoadError:MethodError despite (seemingly) using working code
Hi guys programming newbie here
I am trying to solve a linear programming problem using Julia and GLPK, with emphasis on trying because so far I have been getting errors no matter what I try. This is the code:
using JuMP, GLPK
m =…
frivo9
- 23
- 4
2
votes
2 answers
Error thrown when adding vectorised constraints to JuMP
I am trying to reproduce this model - the code in the tutorial is for an old version of JuMP/Julia and does not run.
However, when I try to add the constraint:
@constraint(model, con, c[i = 1:N] .== ( ((1 - τ) * (1 - l[i]) .* w[i]) + e[i]))
I get…
redmangomckinley
- 155
- 8
2
votes
1 answer
what is NonlinearConstraintIndex in julia?
I tired to change right hand of non-linear constraint in the following code. although kind people helped me a lot, I couldn't to find how should I fix it. would you please help me again? Thank so much.
using JuMP, Ipopt,…
Soma
- 743
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2
votes
1 answer
is there any possibility to change the RHS of non-linear constraints in julia?
Is there any possibility to change the RHS of non-linear constraints?
using JuMP, Ipopt, Juniper,Gurobi,CPUTime
T=0;
ZT=zeros(2,1);
ZB=zeros(2,1);
#-----Model…
Soma
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2
votes
1 answer
dose JuMP.setRHS apply for non-linear modles in julia?
In the following code, RHS of NL-constraints should change. but the error happens.
ERROR: UndefVarError: setRHS not defined. could you please learn me why this error happens?. thanks for your helps
using JuMP,CPLEX,…
Soma
- 743
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- 19
2
votes
1 answer
Is there any non-linear mixed integer solver in julia?
would you please help me in this error . ERROR: Solver does not support discrete variables.
for example in the following code
using JuMP,CPUTime, Distributions,…
Soma
- 743
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- 19