Add Contours

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

Section

Contourcarpet draws contour lines mapped to the carpet coordinate system. The Contourcarpet trace must come before the Carpet trace so it renders beneath the carpet grid lines. autocontour: false with contours: %{start:, end:, size:} sets manual contour levels.

alias Plotly.{Figure, Carpet, Contourcarpet}

a = [0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3]
b = [4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6]
x = [2, 3, 4, 5, 2.2, 3.1, 4.1, 5.1, 1.5, 2.5, 3.5, 4.5]
y = [1, 1.4, 1.6, 1.75, 2, 2.5, 2.7, 2.75, 3, 3.5, 3.7, 3.75]
z = [1, 1.96, 2.56, 3.0625, 4, 5.0625, 1, 7.5625, 9, 12.25, 15.21, 14.0625]

Figure.new()
|> Figure.add_trace(
  Contourcarpet.new(
    carpet: "c1",
    a: a,
    b: b,
    z: z,
    autocontour: false,
    contours: %{start: 1, end: 14, size: 1},
    line: %{width: 2, smoothing: 0},
    colorbar: %{len: 0.4, y: 0.25}
  )
)
|> Figure.add_trace(
  Carpet.new(
    carpet: "c1",
    a: a,
    b: b,
    x: x,
    y: y,
    aaxis: %{tickprefix: "a = ", smoothing: 0, minorgridcount: 9, type: "linear"},
    baxis: %{tickprefix: "b = ", smoothing: 0, minorgridcount: 9, type: "linear"}
  )
)
|> Figure.update_layout(
  title: "Cheater Plot with Contours",
  margin: %{t: 40, r: 30, b: 30, l: 30},
  yaxis: %{range: [0.388, 4.361]},
  xaxis: %{range: [0.667, 5.932]}
)
|> Plotly.show()