# Behavior of @df inside a function
**URL:** https://discourse.julialang.org/t/behavior-of-df-inside-a-function/40262
**Category:** New to Julia
**Created:** [May 27, 2020, 3:18pm UTC](https://discourse.julialang.org/t/behavior-of-df-inside-a-function/40262 "2020-05-27T15:18:10Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@erlebach](https://discourse.julialang.org/u/erlebach)
#### Post date: [May 27, 2020, 3:18pm UTC](https://discourse.julialang.org/t/behavior-of-df-inside-a-function/40262/1 "2020-05-27T15:18:10Z")
Consider the function and a call to this function. Notice the placement of @df on the first line of myPlot().
There is a spae before the @df macro. Everything runs fine. However, if I remove this space, then when compiling myPlot in Atom, I get the error that df\_jump is not defined. I understand that the macro executes before the call to the function, so it is expanding on something that is not defined. But if this is true, why does adding a space before the @ symbol solve the problem? I do not understand. Thanks.
```julia
function run_plot(tot_pop)
prop_infected = 0.001
I0 = floor(Int, tot_pop * prop_infected)
S0 = tot_pop - I0
u0 = [S0,I0,0];
prob = DiscreteProblem(u0,tspan)
prob_jump = JumpProblem(prob,Direct(),sir_model)
sol_jump = solve(prob_jump,SSAStepper());
out_jump = sol_jump(t);
df_jump = DataFrame(out_jump')
df_jump[!,:t] = out_jump.t;
myPlot(df_jump)
end
function myPlot(df_jump)
@df df_jump plot(:t,
[:x1 :x2 :x3],
label=["S" "I" "R"],
xlabel="Time",
ylabel="Number")
end
time run_plot(10000)
```
---
### Author:  [@rdeits](https://discourse.julialang.org/u/rdeits)
#### Post date: [May 27, 2020, 5:03pm UTC](https://discourse.julialang.org/t/behavior-of-df-inside-a-function/40262/2 "2020-05-27T17:03:19Z")
That’s extremely odd. A leading space in front of the `@` should have no effect.
It’s hard to diagnose the real problem from the example that you’ve given because your code relies on a bunch of external functions, variables, and packages, and it’s not clear what exactly those are.
The first thing I would do is find a _minimal_, _reproducible_ example that shows the same problem. I would start by removing all the code that sets up and solves the problem in `run_plot` and replacing it with a dummy `DataFrame`.
---
### Author:  [@erlebach](https://discourse.julialang.org/u/erlebach)
#### Post date: [May 27, 2020, 5:20pm UTC](https://discourse.julialang.org/t/behavior-of-df-inside-a-function/40262/3 "2020-05-27T17:20:08Z")
### Gordon Erlebacher \<[Gerlebacher@fsu.edu](mailto:Gerlebacher@fsu.edu)\>
1:18 PM (1 minute ago)
to **JuliaLang**
I will create a minimal example and see if this happens with my setup in general.
But I agree this should not happen. I thought a MWE would help, but I was hoping that something would jump out. Thanks.