Hello =)

I am very new to Julia…

I want to make a simple contour but it doesn’t work

I alwyas have the error : ERROR: Can’t convert to a Vector. Please supply a range/vector/interval

```
using GLMakie
function meshgrid(x::AbstractVector, y::AbstractVector)
X = repeat(x', inner=(length(y), 1)) # Crée une matrice X
Y = repeat(y', inner=(length(y), 1)) # Crée une matrice Y
return X, Y
end
x_vals = range(-5, stop=5, length=100)
y_vals = range(-5, stop=5, length=100)
X, Y = meshgrid(x_vals, y_vals)
Z = sin.(X .^ 2 + Y .^ 2)
f = Figure(fontsize=18, font="Times New Roman")
ax1 = Axis3(f[1, 1], aspect = (1, 1, 1),
xlabel = "x [m]", ylabel = "y [m]", zlabel = "z [m]")
contour3d!(ax1, X, Y, Z, levels =20)
f
```

Could you help ? =)

Thanks