Add Points and Contours

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

Section

A Carpet base trace can be augmented with Scattercarpet (points/lines in carpet space) and Contourcarpet (contour lines mapped to the carpet grid). All three traces share the same carpet: "c1" ID to link them.

alias Plotly.{Figure, Carpet, Scattercarpet, Contourcarpet}

# Shared carpet grid data
a = [4, 4, 4, 4.5, 4.5, 4.5, 5, 5, 5, 6, 6, 6]
b = [1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3]
y = [2, 3.5, 4, 3, 4.5, 5, 5.5, 6.5, 7.5, 8, 8.5, 10]

# Z values for contours (one per grid point)
z = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

Figure.new()
|> Figure.add_trace(
  Carpet.new(
    carpet: "c1",
    a: a,
    b: b,
    y: y,
    aaxis: %{tickprefix: "a = ", ticksuffix: "m", smoothing: 1, minorgridcount: 9},
    baxis: %{tickprefix: "b = ", ticksuffix: "Pa", smoothing: 1, minorgridcount: 9}
  )
)
|> Figure.add_trace(
  Contourcarpet.new(
    carpet: "c1",
    a: a,
    b: b,
    z: z,
    autocontour: false,
    contours: %{start: 1, end: 12, size: 2},
    colorscale: "Viridis",
    showscale: false
  )
)
|> Figure.add_trace(
  Scattercarpet.new(
    carpet: "c1",
    a: [4, 4.5, 5, 6],
    b: [2, 2, 2, 2],
    mode: "markers+lines",
    name: "b = 2",
    marker: %{size: 10, color: "red"},
    line: %{shape: "spline", smoothing: 1}
  )
)
|> Figure.update_layout(title: "Carpet Plot with Points and Contours")
|> Plotly.show()