Reshaping Data from Wide to Long Format while Collapsing Variable Values for Same IDs in R

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

Stacking Columns by Looking at the First Column Using Pandas' lreshape Function in Python

Finding Consensus in Two Out of Three Columns and Summarizing Them with R Code

Reshaping Data to Plot in R using ggplot2

Reshaping Pandas DataFrames with Multiple Columns Using Stack and Unstack

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