# Plotting with JuMP variables
**URL:** https://discourse.julialang.org/t/plotting-with-jump-variables/18255
**Category:** Optimization (Mathematical)
**Created:** [December 3, 2018, 4:25pm UTC](https://discourse.julialang.org/t/plotting-with-jump-variables/18255 "2018-12-03T16:25:29Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@muriloasouza](https://discourse.julialang.org/u/muriloasouza)
#### Post date: [December 3, 2018, 4:25pm UTC](https://discourse.julialang.org/t/plotting-with-jump-variables/18255/1 "2018-12-03T16:25:29Z")
Hello,
Not sure if i should post this here or in the visualization domain… but how can i plot a bar graph that has JuMP variables and regular Julia variables?
For example, i’m trying to plot a bargraph, like this:
```julia
Using StatPlots
b = repeat(["Before","After"], inner = 4)
p1 = groupedbar([D3_before D3_after], group = b, xlabel = "B", ylabel = "DHT3 (%)", title = "Title 1", bar_position = :dodge, bar_width=0.7)
p2 = groupedbar([DI_before DI_after], group = b, xlabel = "B", ylabel = "DHTI (%)", title = "Title 2", bar_position = :dodge, bar_width=0.7)
plot(p1,p2)
```
Here `D3_before` and `DI_before` are the regular Julia variables (vectors). `D3_after` and `DI_after` are the JuMP variables (vectors) that i got after solving my optimization problem. I tried to run the code, but i got an error as expected:
```julia
ERROR: LoadError: MethodError: Cannot `convert` an object of type Type{JuMP.GenericAffExpr{Float64,J
uMP.Variable}} to an object of type AbstractFloat
This may have arisen from a call to the constructor AbstractFloat(...),
since type constructors fall back to convert methods.
```
---
### Author:  [@odow](https://discourse.julialang.org/u/odow)
#### Post date: [December 3, 2018, 5:19pm UTC](https://discourse.julialang.org/t/plotting-with-jump-variables/18255/2 "2018-12-03T17:19:54Z")
You can’t plot JuMP variables as they are. What you can do is plot the solution values of the JuMP variables.
So if `x` is your JuMP variable, call `x_sol = JuMP.get_value(x)` and then plot `x_sol` instead of `x`.
p.s. when posting questions like this, you should include a reproducible example. Take a read of:
> [@Please read: make it easier to help you](https://discourse.julialang.org/t/psa-make-it-easier-to-help-you/14757):
>
> Welcome to the Julia Discourse! We are enthusiastic about helping Julia programmers, both beginner and experienced. This public service announcement (PSA) outlines best practices when asking for help. Following these points makes it easier for us to help you and more likely you’ll get a prompt, useful answer. Keywords are highlighted to make it easier to refer to specific points. Choose a descriptive title that captures the key part of your question, eg “plots with multiple axes” instead of …
---
### Author:  [@muriloasouza](https://discourse.julialang.org/u/muriloasouza)
#### Post date: [December 3, 2018, 5:58pm UTC](https://discourse.julialang.org/t/plotting-with-jump-variables/18255/3 "2018-12-03T17:58:45Z")
I understand, thank you!
edit: This is weird, for `x` i tried `x_sol = JuMP.get_value(x)` but i got the following error:
`ERROR: LoadError: UndefVarError: get_value not defined`
Then i tried the usual command i knew to get the value of a JuMP variable, `x_sol = getvalue(x)`. The code ran fine, but it didn’t plot anything.
The only thing i see different here, is that the original Julia variable is a `4x1 Array{Float64,2}`, while the new `x_sol` is `Float64[4]`.