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
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How can I use a set with diffrent members as indexs?
Pleas help me. I want to use a set by not order elements as indexes of some
variables. for example
I have
s=[2,3]
@constraint(ILRP,c7[ k=1:2,t=1:4],sum(x[i,j,k,t] for i=[2,3],
j=[2,3])<=size(s,1)-1)'
for index I ,j I want to use [2,3] as…
Soma
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1 answer
Can I debug inside a for or if in julia?
would you please help me? if I have a code including some loops and IFs, how can I debug inside FOR or IF, line by line.
for example
I can use shift+enter for every line. but when it is used for a For all loop will run. Is there any facility to…
Soma
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1 answer
How can I calculate time of my main code?
I have a code which is included some functions. for every functions I use CPUTime. but in main model how can I calculate time. Please help me.
for example
using CPUTime
function Sminf2(ZB,ZT)
model=CreateModel();
…
Soma
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1 answer
How can I sort this List in julia?
Please help me that how can I sort this List by first element?
List = ([-180.0; -67.5], 0), ([270.0; -570.0], 0), ([180.0, -510.0], 1), ([27.15, -288.75], 1), ([-36.0, -244.5], 1)
sortList = ([-180.0; -67.5], 0), ([-36.0, -244.5], 1), ([27.15,…
Soma
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0 answers
How can I use logical condition for this array?
I need to compare 2 elements of a array as following
V=([-180.0 -117.0; -67.5 -111.0], [-117.0 -36.0; -111.0 -244.5])
when I use the following condition
if (V[1][:,2] != V[2][:,1])
It gets true. But V[1][:,2] = [-117.0;-111.0] and V[2][:,1] =…
Soma
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JuMP & Julia - Vector optimization
Trying to work with JuMP and Julia with Gurobi solver I would like to minimize a vector of variable, but can't figure it out how to formulize it.
I have where m is my model name and size_teachers an integer:
@variable(m,…
Celi28
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2 answers
Floatmax not defined is stopping me from solving a MIP
Basically, I have an MIP completely defined, everything is working, until I attempt to solve via GLPK, when it gives me the following error: UndefVarError: floatmax not defined
I tried defining floatmax as anything, but to no avail. I'm completely…
Tamir Einhorn Salem
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how can I use return values from a function?
I use some functions in my main code which they return some values (scalar).
These values will compare in main code.
But when I run the code it has this Error:
"ERROR: MethodError: no method matching isless(::Array{Float64,1},…
Soma
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1 answer
JuMP variable declaration: MethodError
I'm following the quickstart guide on JuMP.
My julia version is 0.7, the code is this:
using JuMP
m = Model()
l = zeros(10)
u = ones(10)
#@variable(m, x)
#@variable(m, 0 <= x[1:10] <= 1)
@variable(m, l<=x[1:10]<=u)
The first two variable macros…
lhk
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1 answer
Running JuMP example
I am trying to run this example on a fresh julia installation (Version 1.0.2 (2018-11-08)):
https://github.com/JuliaOpt/JuMP.jl/blob/master/examples/basic.jl
But I always get this error.
julia> using JuMP, Clp
julia> m =…
Stein
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1 answer
'invalid NLopt arguments' in JuMP with a basic example.
I am new to JuMP, Julia. I am running a very basic example and I get a weird error.
using JuMP
using NLopt
m1 = Model(solver=NLoptSolver(algorithm=:LD_MMA))
@variable(m1, x, start = 0.0)
@variable(m1, y, start = 0.0)
@NLobjective(m1, Min,…
chupa_kabra
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1 answer
Can't `add JuMP` in Julia
I'm attempting to add JuMP, but it's returning an error.
(v1.0) pkg> add JuMP
Resolving package versions...
ERROR: Unsatisfiable requirements detected for package JuMP [4076af6c]:
JuMP [4076af6c] log:
├─possible versions are: [0.1.1-0.1.2,…
natemcintosh
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0 answers
quadratic equality constraint: Julia+Jump+Gurobi
i'm a newbie to julia and struggling how to handle quadratic equality constraints when using gurobi as the main solver. Can u may take a quick look at the following listing? I alread know that such structures are impossible to solve by using gurobi,…
PTueller
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1 answer
Minimize the maximum in Julia JuMP
So I've combed through the various websites pertaining to Julia JuMP and using functions as arguments to @objective or @NLobjective, but let me try to state my problem. I'm certain that I'm doing something silly, and that this is a quick fix.
Here…
0
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1 answer
Element-wise multiplication in JuMP environment
I'm trying to implement the following constraint in a JuMP environment:
@constraint(m, ((c*x) + (p*o)) + (r.*z) - d .== g')
Unfortunately, I get the following error ERROR: MethodError: no method matching append
But trying the element-wise…
Marco Repetto
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