Advanced Parallel Coordinates Plot

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

Section

range: on a dimension sets the visible axis range (not a filter — just the display bounds). tickvals: + ticktext: replace numeric tick labels with custom strings on a given axis. Useful when one dimension encodes categories as integers.

alias Plotly.{Figure, Parcoords}

# Encode species as 0/1/2; use ticktext to show names
species = [0, 0, 0, 1, 1, 1, 2, 2]

Figure.new()
|> Figure.add_trace(
  Parcoords.new(
    dimensions: [
      %{label: "Sepal Length", values: [5.1, 4.9, 5.0, 6.3, 5.8, 5.7, 7.1, 6.3],
        range: [4.0, 8.0]},
      %{label: "Petal Length", values: [1.4, 1.4, 1.4, 4.7, 5.1, 4.5, 5.9, 4.7],
        range: [0.0, 7.0]},
      %{label: "Species", values: species,
        range: [-0.5, 2.5],
        tickvals: [0, 1, 2],
        ticktext: ["Setosa", "Versicolor", "Virginica"]}
    ],
    line: %{color: species, colorscale: "Portland", showscale: false}
  )
)
|> Figure.update_layout(title: "Advanced Parallel Coordinates — Custom Ticks and Range")
|> Plotly.show()