![]() In order to use a pie chart, you must have some kind of whole amount that is divided into a number of distinct parts. Pie charts have a fairly narrow use-case that is encapsulated particularly well by its definition. The annotations in the upper right give us a more precise judgment of the proportions, but the pie chart tells the overarching story of where the votes fell. Chu (yellow) is in second, with about a third of the votes, while Williams (purple) is last, with about a fifth of the votes. ![]() We can see that Reyes, represented by the first blue slice, has just less than half of the votes. The pie chart above depicts the distribution of votes for a fictional election for a small city. Each categorical value corresponds with a single slice of the circle, and the size of each slice (both in area and arc length) indicates what proportion of the whole each category level takes. What is a pie chart?Ī pie chart shows how a total amount is divided between levels of a categorical variable as a circle divided into radial slices. In this article, you will learn how to best use this frequently-misused chart type. Despite often being maligned, the pie chart remains a very commonly-seen chart type.
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