Horizontal Violin Plot

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

Section

orientation: "h" makes the violin horizontal. Pass data as x: instead of y:. Multiple horizontal violins stack vertically using categorical y: values.

alias Plotly.{Figure, Violin}

:rand.seed(:exsss, {1, 2, 3})

gen = fn n ->
  for _ <- 1..n do
    (for _ <- 1..12, do: :rand.uniform()) |> Enum.sum() |> Kernel.-(6.0)
  end
end

Figure.new()
|> Figure.add_trace(
  Violin.new(
    x: gen.(80),
    y: List.duplicate("Group A", 80),
    name: "Group A",
    orientation: "h",
    box: %{visible: true}
  )
)
|> Figure.add_trace(
  Violin.new(
    x: gen.(80),
    y: List.duplicate("Group B", 80),
    name: "Group B",
    orientation: "h",
    box: %{visible: true}
  )
)
|> Figure.update_layout(title: "Horizontal Violin Plot")
|> Plotly.show()