Stacked Area Chart

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

Section

fill: "tonexty" fills between a trace and the trace below it in the data array. The first trace uses fill: "tozeroy" to fill from y=0; subsequent traces use fill: "tonexty".

alias Plotly.{Figure, Scatter}

x = [1, 2, 3, 4, 5]

Figure.new()
|> Figure.add_trace(
  Scatter.new(
    x: x,
    y: [0, 2, 3, 5, 3],
    mode: "lines",
    fill: "tozeroy",
    name: "Trace 1"
  )
)
|> Figure.add_trace(
  Scatter.new(
    x: x,
    y: [3, 5, 1, 7, 3],
    mode: "lines",
    fill: "tonexty",
    name: "Trace 2"
  )
)
|> Figure.update_layout(title: "Stacked Area Chart")
|> Plotly.show()