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Comparison appears to be one of the most common activities in data analysis.
In fact, many situations require us to identify the quantitative difference (or similarity) between values and understand which one is larger or smaller than another.
That's why, basically, there are a lot of chart types designed to facilitate comparison by means of data visualization.

Depending on what kind of data you have, what exactly you need to compare, and whether your visualization should also fulfil any other purpose in addition to comparison, choose from the following types of chart.