Choreo.DecisionTree.Render.DOT (Choreo v0.14.0)

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DOT (Graphviz) rendering for Choreo.DecisionTree.

Produces tree-oriented visualisation:

  • Root — diamond with double border
  • Decisions — diamonds
  • Outcomes — rounded rectangles with class colour coding

Layout is top-down so decisions flow downward to outcomes. Edge labels show the branch condition.

Summary

Functions

to_dot(tree, opts \\ [])

Renders a decision tree to a DOT string.

Functions

to_dot(tree, opts \\ [])

@spec to_dot(Choreo.DecisionTree.t(), keyword()) :: String.t()

Renders a decision tree to a DOT string.

Options

  • :theme — :default, :dark, :minimal, :warm, :forest, :ocean, or a Choreo.Theme struct
  • :rankdir — :tb (default), :lr, etc.
  • :highlighted_nodes — list of node IDs to highlight
  • :highlighted_edges — list of {from, to} tuples to highlight

Examples

iex> tree = Choreo.DecisionTree.new()
iex> tree = tree
...>   |> Choreo.DecisionTree.set_root(:color, feature: "color")
...>   |> Choreo.DecisionTree.add_outcome(:stop, label: "Stop")
...>   |> Choreo.DecisionTree.add_outcome(:go, label: "Go")
...>   |> Choreo.DecisionTree.branch(:color, :stop, "red")
...>   |> Choreo.DecisionTree.branch(:color, :go, "green")
iex> dot = Choreo.DecisionTree.Render.DOT.to_dot(tree)
iex> String.contains?(dot, "digraph")
true
iex> String.contains?(dot, "red")
true
iex> String.contains?(dot, "green")
true