7.4 Plot Customizations

Apart from mappings inside a mapping layer, you can customize AlgebraOfGraphics visualizations inside the visual transformation layers.

For example the linear statistical transformation plot from Section 7.3 can be customized both with the marker objects in the scatter plot but also with the line object in the linear trend plot. We can customize anything that the Makie.jl’s plotting types support inside visual:

blue = visual(Scatter; color=:steelblue, marker=:cross)
red = linear() *
    subvisual(:prediction; color=:red, linestyle=:dot, linewidth=5) *
    subvisual(:ci; color=(:red, 0.15))
plt = data(synthetic_df) * mapping(:x, :y) * (blue + red)
draw(plt)

As you can see we are adding the following keyword arguments to visual(Scatter) transformation layer:

• color: a Symbol for a light blue color, :steelblue
• marker: a Symbol for a vertical cross marker type, :cross

The linear transformation creates two labeled layers: :prediction (the trend line) and :ci (the confidence band). We use subvisual to style each layer independently, applying attributes that are valid for each plot type:

• :prediction line: color=:red, linestyle=:dot, linewidth=5
• :ci band: color=(:red, 0.15) (semi-transparent red)

You can use as many customizations as you want in your plot.

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CC BY-NC-SA 4.0 Jose Storopoli, Rik Huijzer, Lazaro Alonso