Dual axis chart

[techniq]

• https://observablehq.com/@observablehq/plot-dual-axis
• https://observablehq.com/@observablehq/dual-axis-bar-line-chart
• https://vega.github.io/vega-lite/examples/layer_dual_axis.html
• https://github.com/mhkeller/layercake/issues/131
• https://blog.datawrapper.de/dualaxis/
• https://policyviz.com/2022/10/06/avoiding-the-dual-axis-chart/

Approaches

• Overlay 2 separate <Chart> instances on top of each other
  • How to handle tooltips / data
• Remap one series to the other using a linear scale (see example)