-Data can be organized in different ways, for example, in a short/wide or tall/skinny/narrow/long format, but still contain the same information. Often, it is easier to visualize data organized in a tall/skinny/narrow/long format, that is, when the values are collected in just a few value columns. Unpivoting is one way to transform data from a short/wide to a tall/skinny format, so the data can be presented the way you want it in the visualizations.
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