Replicating Columns in Dataframe: Summing Up Values and Keeping Rows Unique with Base R, Dplyr/Tidyr, and Purrr

Reshaping Pandas DataFrames with Multiple Columns Using Stack and Unstack

Reshaping DataFrames from Wide to Long Format in R using tidyr and dplyr Packages

Tidy Data Transformation with Pandas: A Deep Dive into Merging Wide and Long Formats

Reshaping Cast: A Deeper Dive into Compare and Filter

Faceting and Interaction Terms for Comparing Data Frame Attributes Across Observations.

Reshaping Data Frames with Multiple Headers in R Using dplyr

Unstacking Data with Pandas in Python: A Step-by-Step Guide

Transforming Multi-Index DataFrames into Long Format with Python: A Step-by-Step Guide