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So, let's shift the pie clockwise one third of a circle, or 120 degrees. As a bonus, California's label becomes more visible. Shifting the pie clockwise can fix that, and also reposition California to emphasize how big a piece of the pie its population is compared to the other four states. You can do this with pie, 3-D pie, and doughnut charts in Microsoft Excel, or with an Excel chart you've copied to PowerPoint, Word, or Outlook.įor example, in this chart, a couple of the state labels are wedged in under the title. Since continuous data are measured on a scale with many possible values, showing a parts-to-whole relationship does not make sense.To change how the slices in a pie chart are arranged, you rotate it. Usually, pie charts do not make sense for continuous data. Continuous data: choose another chart type

You can use the country abbreviation or you can use numbers to code the country name. Either way, you are simply naming the different groups of data. Wtih nominal data, the sample is also divided into groups but but without any particular order. Country of residence is an example of a nominal variable. For example, in a survey where you are asked to give your opinion on a scale from “Strongly Disagree” to “Strongly Agree,” your responses are categorical. With categorical data, the sample is often divided into groups and the responses have a defined order.

Pie charts make sense to show a parts-to-whole relationship for categorical or nominal data. The slices in the pie typically represent percentages of the total.

Pie charts and types of dataĬategorical or nominal data: appropriate for pie charts If the goal is to show the changes over time for each operating system, a line graph is a better choice. Similarly, we can see that the Android operating system was not in the market until 2008 and comprised more than half the market by 2011. The goal here is to show the parts-to-whole relationship changing over time. We can see how the Windows operating system started out as half of the market share in 2006 and ended with a much smaller market share in 2011.