Transforming Data from Long to Wide Format using tidyr in R

Mastering Data Transformation: R Code Examples for Wide & Narrow Pivot Tables

Overlap Join in R: A Manual Implementation vs Built-in Functions Like `fuzzyjoin`

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Adding a Third Column to a List of Data Frames in R Tidyverse

Using Summarize Within Mutate Instead of Left Join in R

Using R's Dplyr Package for Efficient Grouping and Summarization with Multiple Variables