Rainbow Box Plot

Mix.install([
  {:plotly_ex, "~> 0.3"},
  {:kino, "~> 0.18"}
])

Section

Seven Box traces with rainbow colours demonstrate the full colour spectrum. Each trace's y data is offset slightly to space the boxes apart visually.

alias Plotly.{Figure, Box}

:rand.seed(:exsss, {42, 42, 42})

colors = ["red", "orangered", "orange", "gold", "green", "steelblue", "mediumpurple"]
names  = ["Red", "Orange-Red", "Orange", "Yellow", "Green", "Blue", "Violet"]

fig =
  Enum.zip(colors, names)
  |> Enum.with_index()
  |> Enum.reduce(Figure.new(), fn {{color, name}, i}, fig ->
    y = for _ <- 1..30 do
      (for _ <- 1..12, do: :rand.uniform()) |> Enum.sum() |> Kernel.-(6.0) |> Kernel.+(i * 0.5)
    end

    Figure.add_trace(fig, Box.new(
      y: y,
      name: name,
      fillcolor: color,
      line: %{color: color},
      marker: %{color: color}
    ))
  end)

fig
|> Figure.update_layout(title: "Rainbow Box Plot", showlegend: true)
|> Plotly.show()