Dumbbell plot

Description

Dumbbell plot [1] (also known as Dumbbell chart, Connected dot plot) is great for displaying changes between two points in time, two conditions or differences between two groups.

Example:

Pointers

• Ideally, you start prototyping in a scripting or notebook environment where you can iterate fast. installation instructions can be found here: https://plotly.net/#Installation
• Charts like this that are using baseline trace types to create a new chart type should only be implemented in the top-level Chart API. An example where this is already done is the Range chart that combines a set of differently styled line charts.
• When possible, use #IConvertible for data input, as this allows for strings, number types such as int and float, and DateTime.

References

• [1] https://datavizproject.com/data-type/dumbbell-plot/

从 src/Plotly.NET/ChartAPI/Chart2D.fs 开始，重点查看 issue 中引用的 Chart.Range 实现。按照 Plotly.NET 的安装说明，在脚本或 notebook 环境中制作图表原型，并检查基线折线图是如何组合的。当提供支持灵活 #IConvertible 输入的高级 Dumbbell 图表 API，并显示 issue 中描述的两点连接时，即视为完成。