Faceting

using AlgebraOfGraphics, CairoMakie

Facet grid

df = (x=rand(100), y=rand(100), i=rand(["a", "b", "c"], 100), j=rand(["d", "e", "f"], 100))
plt = data(df) * mapping(:x, :y, col=:i, row=:j)
draw(plt)

Facet wrap

df = (x=rand(100), y=rand(100), l=rand(["a", "b", "c", "d", "e"], 100))
plt = data(df) * mapping(:x, :y, layout=:l)
draw(plt)

Adding traces to only some subplots

df1 = (x=rand(100), y=rand(100), i=rand(["a", "b", "c"], 100), j=rand(["d", "e", "f"], 100))
df2 = (x=[0, 1], y=[0.5, 0.5], i=fill("a", 2), j=fill("e", 2))
layers = data(df1) * visual(Scatter) + data(df2) * visual(Lines)
fg = draw(layers * mapping(:x, :y, col=:i, row=:j))

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