- This is also known as Coxcomb Chart or Polar Area Diagram
- Use: It is used to plot cyclic phenomenon with segments
- It is a combination of stacked column chart and radar chart
- The chart is similar to the pie chart, but the angles are equal and the amount in which radial regions extends from the center of the circle
- The radius of each sector is proportional to the square root of the value of the variable, so the area of each sector represents the value of the variable
- It was famously used by Florence Nightingale to represent preventable deaths, death from wounds, and death by all other causes of soldiers during the war
- The outer regions have larger area size, so they get more emphasis by the viewer. This is a con of this visualization
- Purpose
Analyzing cyclic phenomenon and contribution of different factors using segments
Identifying the relative effects across different periods visually
* Identifying patterns if any in the cyclin phenomenon