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Question: What is the difference between “long” and “wide” format data?


“Long format is when each observation gets a row, such as a person at three different time points. Wide format condenses that such that a person may have three columns of data representing each time point, with row being the person. This all depends on what level of analysis you’re using, as even people can represent multiple data points for an organization, etc.”


  1. Includes person by time data, such as a user by date.

  2. Conversion turns rows into columns.