# Passing arrays as variable bounds without indexing them is not supported. JuMP
**URL:** https://discourse.julialang.org/t/passing-arrays-as-variable-bounds-without-indexing-them-is-not-supported-jump/97697
**Category:** Optimization (Mathematical)
**Tags:** jump
**Created:** [April 20, 2023, 10:50am UTC](https://discourse.julialang.org/t/passing-arrays-as-variable-bounds-without-indexing-them-is-not-supported-jump/97697 "2023-04-20T10:50:25Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@himgoy](https://discourse.julialang.org/u/himgoy)
#### Post date: [April 20, 2023, 10:50am UTC](https://discourse.julialang.org/t/passing-arrays-as-variable-bounds-without-indexing-them-is-not-supported-jump/97697/1 "2023-04-20T10:50:25Z")
Hello Everyone,
I am working on a linear programming problem for which I am creating lower bounds and upper bounds for each variable using for loop and pushing it into an array. I have a total of 5489 variables.
```julia
M = Model()
set_optimizer(M, HiGHS.Optimizer)
lb = []
ub = []
for i in 1:shapeOfMat[1]
for j in 1:shapeOfMat[2]
if datecolMatrix[i, j] == 1
if condition
bound = *
push!(lb, bound)
push!(ub, bound)
else
if condition
ubound = *
push!(lb, 1)
push!(ub, ubound)
else
lowerBound = *
upperBound = *
push!(lb, lowerBound)
push!(ub, upperBound)
end
end
end
end
end
# Define the variables
@variable(M, lb[i] <= y[i = 1:len] <= ub[i])
```
For the above code I am getting :-
At In[31]:57: `@variable(M, ub[i] >= y[i = 1:len] >= lb[i])`: Passing arrays as variable bounds without indexing them is not supported.
Instead of:
```julia
@variable(model, x[1:2] >= lb)
```
use
```julia
@variable(model, x[i=1:2] >= lb[i])
```
or
```julia
@variable(model, x[1:2])
set_lower_bound.(x, lb)
```
---
### Author:  [@gdalle](https://discourse.julialang.org/u/gdalle)
#### Post date: [April 20, 2023, 3:55pm UTC](https://discourse.julialang.org/t/passing-arrays-as-variable-bounds-without-indexing-them-is-not-supported-jump/97697/2 "2023-04-20T15:55:49Z")
Does it work when you replace your code with JuMP’s suggestions?
As a side note, you might want to specify the type of your bound arrays beforehand: declaring `lb = Float64[]` instead of `lb = []` will do wonders for performance
---
### Author:  [@himgoy](https://discourse.julialang.org/u/himgoy)
#### Post date: [April 20, 2023, 6:42pm UTC](https://discourse.julialang.org/t/passing-arrays-as-variable-bounds-without-indexing-them-is-not-supported-jump/97697/3 "2023-04-20T18:42:40Z")
Thank You for the suggestion. And no, none of the changes suggested by JuMP are working. I have tried
```julia
@variable(M, y[i = 1:len] >= lb[i])
```
Trying the below code gave
```julia
@variable(M, y[i = 1:len])
set_lower_bound.(y, lb)
```
MethodError: no method matching set\_lower\_bound(::VariableRef, ::Vector{Float64})
---
### Author:  [@gdalle](https://discourse.julialang.org/u/gdalle)
#### Post date: [April 20, 2023, 6:51pm UTC](https://discourse.julialang.org/t/passing-arrays-as-variable-bounds-without-indexing-them-is-not-supported-jump/97697/4 "2023-04-20T18:51:35Z")
How about this, with elementwise bounds that do not rely on indexing `lb` or `ub` with `i`?
```julia
@variable(model, lb .<= x[1:2] .<= ub)
```
---
### Author:  [@joaquimg](https://discourse.julialang.org/u/joaquimg)
#### Post date: [April 20, 2023, 10:03pm UTC](https://discourse.julialang.org/t/passing-arrays-as-variable-bounds-without-indexing-them-is-not-supported-jump/97697/5 "2023-04-20T22:03:18Z")
The code:
```julia
using JuMP, HiGHS
model = Model(HiGHS.Optimizer)
N = 5
lb = zeros(N)
@variable(model, y[i = 1:N] >= lb[i])
@variable(model, z[1:N])
set_lower_bound.(z, lb)
```
works perfectly for me with JuMP 1.10.0 and HiGHS 1.5.1
---
### Author:  [@odow](https://discourse.julialang.org/u/odow)
#### Post date: [April 20, 2023, 11:30pm UTC](https://discourse.julialang.org/t/passing-arrays-as-variable-bounds-without-indexing-them-is-not-supported-jump/97697/6 "2023-04-20T23:30:19Z")
> [@himgoy](#):
>
> And no, none of the changes suggested by JuMP are working. I have tried
This should work. Please provide a reproducible example.