I’m trying to implement plotting functions for my custom types as seen in http://docs.juliaplots.org/latest/recipes/.

However, I cannot seem to make it work using custom parametric types. For example, take the following struct and recipe.

```
struct Point{T<: Integer}
x::T
y::T
end
@recipe f(::Type{Point},P::Point) = P.x, P.y
```

That seems to be what I have to implement in order to be able to convert a `Point`

to something that can be plotted ( a tuple of integers).

However, when I do that I get the following output:

```
julia> using Plots
julia> struct Point{T<:Integer}
x::T
y::T
end
julia> @recipe f(::Type{Point}, P::Point) = P.x, P.y
julia> P = Point(3,3)
Point{Int64}(3, 3)
julia> plot(P)
ERROR: No user recipe defined for Point{Int64}
[...]
```

I also tried to define a “User Recipe” for a given `Point`

in the following manner:

```
julia> @recipe function f(P::Point)
x = P.x
y = P.y
seriestype --> :scatter
[(x,y)]
end
```

This does work when I call `plot(P)`

and gives the correct output. However it feels a bit “hacky” having to return an array of 1 tuple instead of just the tuple. It also does not work on arrays of `Point`

s:

```
julia> [P,P,P]
3-element Array{Point{Int64},1}:
Point{Int64}(3, 3)
Point{Int64}(3, 3)
Point{Int64}(3, 3)
julia> plot(ans)
ERROR: No user recipe defined for Point{Int64}
[...]
```

Can someone give some pointers on how to implement this? Specially the part about it working on arrays of points, since that is what I can’t seem to get to work.