begin
struct Measurement <: Number
val::Float64
err::Float64
end
value(m::Measurement) = begin
m.val
end
uncertainty(m::Measurement) = begin
m.err
end
@recipe function f(::Type{T}, m::T) where T <: AbstractArray{<:Measurement}
if !(get(plotattributes, :seriestype, :path) in [:contour, :contourf, :contour3d, :heatmap, :surface, :wireframe, :image])
error_sym = Symbol(plotattributes[:letter], :error)
plotattributes[error_sym] = uncertainty.(m)
end
value.(m)
end
x = Measurement.(10 * sort(rand(10)), rand(10))
y = Measurement.(10 * sort(rand(10)), rand(10))
z = Measurement.(10 * sort(rand(10)), rand(10))
surf = Measurement.((1:10) .* (1:10)', rand(10, 10))
plot(scatter(x, [x y]), scatter(x, y, z), heatmap(x, y, surf), wireframe(x, y, surf), legend = :topleft)
end
