Geom.label positioning with stacked bar plot

[tomyun]

using DataFrames
using Gadfly

df = DataFrame(
    x = [:A, :A, :A, :B, :B, :B],
    y = [0.2, 0.3, 0.5, 0.1, 0.6, 0.3],
    l = ["0.2", "0.3", "0.5", "0.1", "0.6", "0.3"],
    c = [:a, :b, :c, :a, :b, :c],
)
plot(df, x = :x, y = :y, color = :c, label = :l, Geom.label, Geom.bar(position = :stack))

Couldn't find a way to get correct position for labels in stacked bar plot.

[Mattriks]

The trick here is to use Stat.dodge. Note for Geoms+Stats outside layers order matters.
I also had to add Scale.x_discrete, not sure why and I should investigate.

p = plot(df, x=:x, y=:y, color=:c, label=:l, 
    Geom.label(position=:centered), Stat.dodge(position=:stack),
    Geom.bar(position=:stack), Scale.x_discrete
)

[tomyun]

Stat.dodge with Scale.x_discrete worked great for me. Thanks for the tip!

[Aina29]

@Mattriks how to do it when using Geom.subplot_grid()?