Legend for barplot

[jtrakk]

This doesn't generate a legend but it could.

(
        data(DataFrame(value=randn(2000), group=rand(["a", "b"], 2000))) 
        * mapping(:value, color=:group => categorical)
        * AlgebraOfGraphics.histogram
) |> draw


Warning: Automated legend was not possible due to ErrorException("    There is no `legendelements` method defined for plot type Combined{AbstractPlotting.barplot,Tuple{Array{Point{2,Float32},1}}}. This means\n    that you can't automatically generate a legend entry for this plot type.\n    You can overload this method for your plot type that returns a `LegendElement`\n    vector, or manually construct a legend entry from those elements.\n")

[greimel]

Seems to be solved by JuliaPlots/AbstractPlotting.jl#565.

[piever]

Yes, this has been fixed upstream in AbstractPlotting.