Let’s Dispose of Exploding Pie Charts
Pie charts are seldom a good idea. Here's why.A picture can be worth a thousand words. A graph can be worth a thousand numbers. Unfortunately, pictures and words can be deceptive — either intentionally or unintentionally. One common type of deception involves the use of two- or three-dimensional figures to represent single numbers. For example, the Washington Post once used the figure below to illustrate how inflation had eroded the purchasing power of the U.S. dollar between 1958 and 1978. To make the figure memorable, each of the dollar bills contained a photo of the U.S. President that year in place of the George Washington image that actually appears on the $1 bill. Washington Post, October 25, 1978 Prices more than doubled between 1958 (when Dwight Eisenhower was Read More ›