Animating Sequences of Frames

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

Section

Pass a list of frame names as the first args element to play a specific sequence. nil plays all frames. Combine with transition.duration for smooth interpolation.

alias Plotly.{Figure, Scatter}

# Build frames for a growing spiral
frames =
  for i <- 1..60 do
    t = Enum.map(0..i, fn j -> j * 0.2 end)
    x = Enum.map(t, fn ti -> ti * :math.cos(ti) end)
    y = Enum.map(t, fn ti -> ti * :math.sin(ti) end)
    %{name: "s#{i}", data: [%{x: x, y: y}]}
  end

odd_frames = for i <- 1..30, do: "s#{i * 2 - 1}"   # frames s1, s3, s5 ...
even_frames = for i <- 1..30, do: "s#{i * 2}"       # frames s2, s4, s6 ...

Figure.new(
  data: [Scatter.new(x: [0], y: [0], mode: "lines", line: %{color: "steelblue"})],
  layout: %{
    title: "Spiral Animation — Sequence Selection",
    xaxis: %{range: [-13, 13], autorange: false},
    yaxis: %{range: [-13, 13], autorange: false},
    updatemenus: [%{
      type: "buttons",
      buttons: [
        %{label: "All frames", method: "animate",
          args: [nil, %{frame: %{duration: 30, redraw: false}}]},
        %{label: "Odd frames", method: "animate",
          args: [odd_frames, %{frame: %{duration: 60}}]},
        %{label: "Even frames", method: "animate",
          args: [even_frames, %{frame: %{duration: 60}}]}
      ]
    }]
  },
  frames: frames
)
|> Plotly.show()