Pie charts are one of the simplest ways to visualize information. Their structure is based on simple logic: The largest piece of the pie should begin at the top of the circle, and the values should ...

A pie chart could be used to show how students travel to school. Each piece of data is shown as a proportion of 360, because there are 360 degrees in a circle. If 25 out of 100 students travel to ...

Last week via our Twitter account, @NPRFood, we learned that an enterprising Australian baker with a taste for data visualization had gone looking for hard data to make an edible pie chart.

In the piece ‘Land of the Free, Home of the Poor,’ we used a trio of pie charts broken down into five quintiles to illustrate economic inequality on a country level. One chart represented the ...

Elementary statistics and graphing books offer recipes; i.e., guidance on when to use the chart types that appear in common menus. The recipes suggest that one use pie charts for parts of a whole ...