Transforming Wide Format Data into Long Format with Additional Column Type

Melting Data with Multiple Groups in R Using Tidyr

Reshaping Data from Long to Wide Format Using R's reshape2 Package

Converting Wide Dataframe to Long Format with Quadruple Nesting Using R's melt Function

Understanding Data Transformation: Reshaping from Long to Wide Format with R

Re-structuring Data in R Studio: A Deep Dive into tidyr and dplyr