What is the definition for a donut graph?

Answer 1

A doughnut graph/chart is similar to a pie chart in that it conveys how much each part contributes to a whole. When graphing one series of data, the only difference between a pie chart and a doughnut chart is that the doughnut chart has empty space in the middle. The primary advantage of a doughnut chart is that it can help visualize several series of data on one chart. When creating a doughtnut chart from multiple data series in Excel, each series has its own doughnut, and the doughnuts are nested inside one another to form one chart.

When working with multiple data series you can make several pie charts (one for each series) and place them next to eachother, or a single doughnut chart. Which of these is options better conveys the information depends on the data (how many series you have, etc), and ultimately is up to personal interpretation/preference.

Example:

If you wanted to compare the percentage of each population group in a city, you could use a pie chart (or a doughnut chart if you would like empty space in the middle).

To compare this to the same data from 10 years prior, you could use two pie charts (one for now, one for 10 years prior), or one doughnut chart.

Answer 2

doughnut graph is a kind of graph that is circle but more different from pie graph

Answer 3

It is like a pie chart, but it has a hole in the middle. It has the same function as a pie chart. It just looks different (like a donut instead of a pie) when you display the data.