3D Scatter Plot

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

Section

Scatter3d.new(x:, y:, z:) places points in 3D space. The marker map supports size:, color: (as a list for per-point coloring), colorscale:, opacity:, and showscale:. layout.scene configures the 3D axes and camera.

alias Plotly.{Figure, Scatter3d}

# Generate synthetic helix data
n = 50
t = Enum.map(0..(n - 1), &(&1 / n * 4 * :math.pi()))
x = Enum.map(t, &:math.cos/1)
y = Enum.map(t, &:math.sin/1)
z = Enum.map(0..(n - 1), &(&1 / n))

Figure.new()
|> Figure.add_trace(
  Scatter3d.new(
    x: x,
    y: y,
    z: z,
    mode: "markers",
    marker: %{
      size: 8,
      color: z,
      colorscale: "Viridis",
      opacity: 0.8,
      showscale: true
    }
  )
)
|> Figure.update_layout(
  title: "3D Scatter — Helix",
  scene: %{
    xaxis: %{title: "X"},
    yaxis: %{title: "Y"},
    zaxis: %{title: "Z"}
  }
)
|> Plotly.show()