Chapter 7: Reshaping a Data Table
Reasons for Wide and Long Formats
Introduction
For most analyses, we organize data into a two-dimensional tabular format in which each row is an individual observation or case, and each column contains a measurement or attribute pertaining to that individual. There are times, though, when this is not the only option or even the preferred option. This is particularly the case in longitudinal or repeated-measures studies where we will have multiple ...
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