Converting Pandas DataFrames from Long to Wide Format Using Multi-Index Composite Keys

Reshape and Group by Operations in Pandas DataFrames: A Comparative Approach

Transforming a Dataset from Rows to Columns in R: A Step-by-Step Guide

Reshaping Wide Format Data Using R and data.table Package

Merging Rows by Subject Number: A Guide to Longing Data in R

Transforming Wide Format DataFrames in R: A Step-by-Step Guide to Long Format Using gather Function

Reshaping DataFrames: A Comprehensive Guide to Changing Columns and Rows Using the Tidyverse

Data Pivoting in R: A Comprehensive Guide to Manipulating Data Frames