Fixed Ratio Axes

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

Section

layout.scene.aspectmode controls the aspect ratio of the 3D bounding box:

• "auto" (default) — plotly chooses based on data range
• "cube" — forces all three axes equal length
• "data" — axes scaled proportionally to data ranges
• "manual" — set explicit ratios via layout.scene.aspectratio

alias Plotly.{Figure, Scatter3d}

t = Enum.map(0..100, fn i -> i / 10 end)
x = Enum.map(t, &:math.cos/1)
y = Enum.map(t, &:math.sin/1)
z = t

Figure.new()
|> Figure.add_trace(Scatter3d.new(x: x, y: y, z: z, mode: "lines", name: "cube aspect"))
|> Figure.update_layout(
  title: "Fixed Ratio — aspectmode: cube",
  scene: %{aspectmode: "cube"}
)
|> Plotly.show()

Figure.new()
|> Figure.add_trace(Scatter3d.new(x: x, y: y, z: z, mode: "lines", name: "manual aspect"))
|> Figure.update_layout(
  title: "Fixed Ratio — aspectmode: manual (x:y:z = 1:1:2)",
  scene: %{
    aspectmode: "manual",
    aspectratio: %{x: 1, y: 1, z: 2}
  }
)
|> Plotly.show()