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
3 answers
How to extract optimization problem matrices A,b,c using JuMP in Julia
I create an optimization model in Julia-JuMP using the symbolic variables and constraints e.g. below
using JuMP
using CPLEX
# model
Mod = Model(CPLEX.Optimizer)
# sets
I = 1:2;
# Variables
x = @variable( Mod , [I] , base_name = "x" )
y =…
Manos
- 85
- 5
2
votes
1 answer
How to write a JuMP constraint into a text file?
I have searched but didn't find an answer. I have read a MPS file into a JuMP model. Now I would like to write a subset of constraints into a text file for further analysis. I know how to write a JuMP model into a LP or MPS file. But here I just…
Feng
- 105
- 5
2
votes
1 answer
How to define a JuMP expression conditional on index value
I am trying to define a @NLexpression in JuMP that has different specifications at different indices. In the below example, I want the expression y[j,k] to be defined as 1/(x[j] - x[k]) when j != k and take some other value when j == k. I can…
hilberts_drinking_problem
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- 51
2
votes
1 answer
Julia JuMP - array index which is an index of another array
I have to solve a problem with permutations. The function takes vector a with n elements as a parameter. I declare b as @variable - there should be the permutation 1:n that gives the best result after finding the solution of a problem.
The error…
jakub1998
- 400
- 2
- 13
2
votes
1 answer
AMPL to JuMP (Julia)
I need to transform a AMPL code to JuMP.
param f;
set R := 1..N;
set R_OK := 1..M;
set V := 1..N;
param tMax;
set T := 1..tMax;
var primary{R,V}, binary;
var SendPrepReq{T,R,V}, binary;
"param f" would be an int. The varibles I know how to do.…
bakun
- 448
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2
votes
0 answers
JuMP 0.20 - How to get a relaxed solution using !optimize?
In JuMP 0.18 we could do solve(model, relaxation=true).
There isn't this option in !optimize, so how can I get a relaxed solution?
Henrique Andrade
- 855
- 1
- 12
- 25
2
votes
1 answer
UndefVarError in Julia
Very new to Julia and trying to work through some code. I keep getting this error: "ERROR: LoadError: LoadError: UndefVarError: @defVar not defined". The start of the code is below where I define the @defVar. Julia Version 1.1.1 (2019-05-16). Here…
RedbirdFan23
- 35
- 5
2
votes
2 answers
How to sum for all in Julia/JuMP v 1.10
I saw an outdated answer in the following thread (How to do "for all" in sum notation in Julia/JuMP)
which is 3 years old unfortunately, but it's exactly what I want. However the code fails due to a number of syntax errors as the sum() function has…
victor chin
- 23
- 4
2
votes
1 answer
How can I use universal and existential quantification in julia?
I want to code domination definition in Julia. x dom y. x , y are 2 vectors.
b=all(x<=y) && any(x
Soma
- 743
- 6
- 19
2
votes
1 answer
Is there any function such as repmat for struct in julia?
would you please help me. I want to produce a population of struct in Julia.In matalab,we can use repmat for a structure. but in Julia it is impossible. is there any function like repmat in Julia?
for example:
npop=20;
struct individual
…
Soma
- 743
- 6
- 19
2
votes
2 answers
Range for continuos distribution in Julia
I am trying to calculate the density function of a continuos random variable in range in Julia using Distributions, but I am not able to define the range. I used Truncator constructor to construct the distribution, but I have no idea how to define…
Chris Martin
- 45
- 4
2
votes
2 answers
Julia Key Error when accessing a value in dictionary
When trying to run this code Julia keeps giving me the error message "KeyError: key 18=>63 not found" anytime I try to access demand[i]. It seems that this error happens every time the element in dem is larger than 50.
using JuMP, Clp
hours =…
mmcook
- 23
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- 3
2
votes
0 answers
Modifying code of package downloaded via JuliaPro
I have an issue with my JuliaPro installation:
I want to add a function in the Cbc C interface, but all I have in my JuliaPro installation directories are include files and dynamic libraries.
Can I keep my JuliaPro installation as is and still have…
A. Toullat
- 33
- 4
2
votes
0 answers
Juliaopt JuMP CbcSolver how to print progress
I coding in julia using JuMP of Juliopt.
I would like to know how to print the solve progress using CbcSolver?
I already used the log level parameter:
m = Model(solver = CbcSolver(log=1))
it works and you can choose between 0 to 3, higher more…
2
votes
3 answers
Julia's equivalent of MATLAB's inpolygon()
Is there such function in Julia?
Desperately trying to migrate to Julia from MATLAB, but still finding myself dependent on it...
aberdysh
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