Since this is a fairly common task, bar charts are a fairly ubiquitous chart type. From a bar chart, we can see which groups are highest or most common, and how other groups compare against the others. When you should use a bar chartĪ bar chart is used when you want to show a distribution of data points or perform a comparison of metric values across different subgroups of your data. We can see from this chart that while there are about three times as many purchases from new users who create user accounts than those that do not create user accounts (guests), both are dwarfed by the number of purchases made by repeating users. The categorical feature, user type, is plotted on the horizontal axis, and each bar’s height corresponds to the number of purchases made under each user type. This example bar chart depicts the number of purchases made on a site by different types of users. Bars are plotted on a common baseline to allow for easy comparison of values. Each categorical value claims one bar, and the length of each bar corresponds to the bar’s value. Levels are plotted on one chart axis, and values are plotted on the other axis. What is a bar chart?Ī bar chart (aka bar graph, column chart) plots numeric values for levels of a categorical feature as bars. One of the most fundamental chart types is the bar chart, and one of your most useful tools when it comes to exploring and understanding your data.
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