Adding Names to Line and Scatter Plot

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

Section

Set name: on each trace to control what appears in the legend. Without names, Plotly uses "trace 0", "trace 1", etc.

alias Plotly.{Figure, Scatter}

Figure.new()
|> Figure.add_trace(
  Scatter.new(
    x: [1, 2, 3, 4],
    y: [10, 15, 13, 17],
    mode: "markers",
    name: "Scatter"
  )
)
|> Figure.add_trace(
  Scatter.new(
    x: [2, 3, 4, 5],
    y: [16, 5, 11, 9],
    mode: "lines",
    name: "Lines"
  )
)
|> Figure.add_trace(
  Scatter.new(
    x: [1, 2, 3, 4],
    y: [12, 9, 15, 12],
    mode: "lines+markers",
    name: "Lines and Markers"
  )
)
|> Figure.update_layout(title: "Named Traces")
|> Plotly.show()