Tags / reshape
Reshape and Group by Operations in Pandas DataFrames: A Comparative Approach
Reshaping Data to Plot in R using ggplot2
Here's the complete code with all methods:
Understanding Long-Format Data and the Need for Reshaping Using Pivot_Wider in R Programming Language
Reshaping Wide Format Data Using R and data.table Package
Replicating Columns in Dataframe: Summing Up Values and Keeping Rows Unique with Base R, Dplyr/Tidyr, and Purrr