Dates and Unitful

[jariji]

I like to plot data from Dates.jl and Unitful.jl.

julia> tab = StructArray(a=(1:10)u"m", b=(10:10:100)u"s")
10-element StructArray(::StepRange{Quantity{Int64, 𝐋, Unitful.FreeUnits{(m,), 𝐋, nothing}}, Quantity{Int64, 𝐋, Unitful.FreeUnits{(m,), 𝐋, nothing}}}, ::StepRange{Quantity{Int64, 𝐓, Unitful.FreeUnits{(s,), 𝐓, nothing}}, Quantity{Int64, 𝐓, Unitful.FreeUnits{(s,), 𝐓, nothing}}}) with eltype @NamedTuple{a::Quantity{Int64, 𝐋, Unitful.FreeUnits{(m,), 𝐋, nothing}}, b::Quantity{Int64, 𝐓, Unitful.FreeUnits{(s,), 𝐓, nothing}}}:
 (a = 1 m, b = 10 s)
 (a = 2 m, b = 20 s)
 (a = 3 m, b = 30 s)
 (a = 4 m, b = 40 s)
 (a = 5 m, b = 50 s)
 (a = 6 m, b = 60 s)
 (a = 7 m, b = 70 s)
 (a = 8 m, b = 80 s)
 (a = 9 m, b = 90 s)
 (a = 10 m, b = 100 s)

julia> Plot(data=tab, encodings=(;x=(;field=:a), y=(;field=:b)), graphic=Circle(r=5)) |> draw
ERROR: MethodError: no method matching wilk_ext(::Quantity{Float64, 𝐋, Unitful.FreeUnits{(m,), 𝐋, nothing}}, ::Quantity{Float64, 𝐋, Unitful.FreeUnits{(m,), 𝐋, nothing}}, ::Int64)


Closest candidates are:
  wilk_ext(::Real, ::Real, ::Real, ::Any, ::Vector{<:Real}, ::Vector{<:Real})
   @ Vizagrams ~/.julia/packages/Vizagrams/gWrWE/src/auxiliar/generate_ticks_ext_wilkinson.jl:92
  wilk_ext(::Real, ::Real, ::Real, ::Any, ::Vector{<:Real})
   @ Vizagrams ~/.julia/packages/Vizagrams/gWrWE/src/auxiliar/generate_ticks_ext_wilkinson.jl:92
  wilk_ext(::Real, ::Real, ::Real, ::Any)
   @ Vizagrams ~/.julia/packages/Vizagrams/gWrWE/src/auxiliar/generate_ticks_ext_wilkinson.jl:92

[davibarreira]

This seems like it would be easy to port. I'll take a look.

[davibarreira]

@jariji , sorry for taking so long. I had to refactor some major parts of the code.

Anyways, now I can actually address the issue here. I got your example to work. The code pretty much strips the units before computing scales and other stuff. Do you have other examples I can perhaps try before modifying the code?
I don't commonly use Unitful.

[jariji]

Please don't rush, I'm mostly just curious about the library at this point.

If you're interested, however, some other examples would be

• if multiple pieces of data are plotted in different units, they should be converted to a shared unit
• logarithmic units
• affine units.