## Pie chart

A pie chart is a circular chart that is divided into slices to represent the proportion of different categories in a data set. Each slice of the pie chart represents a particular category, and the size of the slice is proportional to the relative frequency or percentage of the category in the data set.

Pie charts are commonly used to visualize data that is categorical or nominal in nature, such as market share, demographic data, or survey results. They are useful for showing how different categories contribute to the whole and for comparing the relative sizes of different categories.

To create a pie chart, you need to first determine the categories in the data set and calculate the percentage or relative frequency of each category. Then, you can draw a circle and divide it into slices proportional to the percentage or frequency of each category.

Pie charts are easy to read and understand, and they are effective at communicating the relative sizes of different categories. However, they can be less effective at comparing absolute values or small differences between categories. In addition, pie charts should be used carefully when there are too many categories to display, as it can make the chart crowded and difficult to read.

Overall, pie charts are a useful tool for visualizing categorical data and comparing the relative sizes of different categories.

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