Large Number of Slices

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

Section

maxdepth limits how many levels are rendered at once. The full hierarchy is still navigable — clicking a node drills into it and displays its children up to maxdepth levels deep. Set maxdepth: -1 to show all levels.

alias Plotly.{Figure, Sunburst}

labels = [
  "Root",
  "A", "B", "C",
  "A1", "A2", "A3",
  "B1", "B2",
  "C1", "C2", "C3",
  "A1a", "A1b", "A2a"
]

parents = [
  "",
  "Root", "Root", "Root",
  "A", "A", "A",
  "B", "B",
  "C", "C", "C",
  "A1", "A1", "A2"
]

values = [0, 0, 0, 0, 4, 3, 5, 6, 4, 2, 7, 3, 2, 2, 3]

Figure.new()
|> Figure.add_trace(
  Sunburst.new(
    labels: labels,
    parents: parents,
    values: values,
    branchvalues: "remainder",
    maxdepth: 2
  )
)
|> Figure.update_layout(title: "Sunburst with maxdepth: 2 (click a node to drill down)")
|> Plotly.show()