RdBu Colorscale

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

Section

"RdBu" (Red-Blue) is a diverging colorscale — red for high values, blue for low, white at the midpoint. Ideal for data that has a meaningful zero (e.g. anomalies, differences).

alias Plotly.{Figure, Heatmap}

z = for i <- 0..9, do: (for j <- 0..9, do: :math.sin(i / 3.0 + j / 5.0) * 10)

Figure.new()
|> Figure.add_trace(Heatmap.new(z: z, colorscale: "RdBu"))
|> Figure.update_layout(title: "RdBu Colorscale Heatmap")
|> Plotly.show()