New Recipes to support StatsPlots.jl about unitfulrecipes.jl HOT 5 OPEN

I am not really familiar with StatsPlots.jl, but if you want to tackle this issue I am happy to help with the UnitfulRecipes.jl side. My guess is that kde first performs a calculation (estimating kernel density) and then does some plotting stuff.
And the calculation is probably not compatible with units? Then one approach would be to make the calculation compatible with Unitful.jl I think and afterwards unitful plotting magically works hopefully.

from unitfulrecipes.jl.

The issue is that KernelDensity.kde() only accepts Real, while Unitful.Quantity isa Number but not a Real.

One solution to this and several similar bugs is a pretty invasive rework of Unitful with

struct RealQuantity{T<:Real, D, U} <: Real
    val::T
end
RealQuantity(q::Q) where {Q<:Unitful.Quantity} = RealQuantity{Q.parameters...}(q.val)

Another is to make kde more permissive, using isreal rather than dispatching with Real if that's important.

from unitfulrecipes.jl.

I am not really familiar with StatsPlots.jl, but if you want to tackle this issue I am happy to help with the UnitfulRecipes.jl side.

• Thank you for the kind offer. Step one for me is to learn how generic Plots.jl recipes work, then UnitfulRecipes, so it might be a while yet 😄

My guess is that kde first performs a calculation (estimating kernel density) and then does some plotting stuff. And the calculation is probably not compatible with units?

• I think this is also the case. Does this mean that the Plots.jl plot types all have methods which permit Unitful data?

Then one approach would be to make the calculation compatible with Unitful.jl I think and afterwards unitful plotting magically works hopefully.

• If this is the right thing to do, I think this will be a thing to take to StatsPlots.jl in the first instance, and then return to UnitfulRecipes if needed afterward.

from unitfulrecipes.jl.

One solution to this and several similar bugs is a pretty invasive rework of Unitful

• Thanks for your feedback!
• Good to know, though such a step is definitely beyond me (I'm an engineer rather than programmer) and I am unsure if anyone else is interested in using the StatsPlots functionality with Unitful data directly.
• Is this something that should be mentioned to the people who maintain Unitful, do you think?

In the meantime, I was able to plot what I was trying to, by, for example, doing a groupedbar() plot with data without any units, then I needed to plot a hline() on to this plot, which works very nicely with UnitfulRecipes, and lets the axes be scaled and the units be put onto the axes automatically with unitformat=:square or similar.

I intend to learn more about how this works in the future, at which point perhaps I can contribute something 🤞

from unitfulrecipes.jl.

Does this mean that the Plots.jl plot types all have methods which permit Unitful data?

It's rather that through our recipes, we are telling Plots how to convert Unitful data to unitless data before any plotting is done. I can't quite figure out why no such transformation is applied for StatsPlots.

from unitfulrecipes.jl.