The charts for comparison, transition, and composition analysis take care of over two-thirds of the data analysis required in business applications. However, there are a number of metrics that can only be visualized with charts specialized for that purpose. We will take a look at these charts now.
Gauges are single value indicators used to display Key Performance Indicators (KPIs) such as average sale per customer, conversion rates, current inventory levels, project status, and customer satisfaction index. The most commonly used gauge is the angular gauge, more popularly known as the speedometer chart. As the name implies, it is similar in both look and feel to the speedometer of a car. Let us plot the customer satisfaction rating for Harry's SuperMart on an angular gauge.
In the previous screenshot, the angular gauge shows the rating at 9.2 on a scale of 10. In addition to that, it also adds a lot of context to the data with the color range breaking down the...