Reshaping Pandas DataFrame with Dictionary Values Using String Manipulation and Evaluation

Reshaping Data Frames with Multiple Headers in R Using dplyr

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

Reshaping Three-Collar Data Frames to Matrix Format Using R

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

Here's a summary of the provided information and some additional examples to demonstrate the usage of the `melt()` function in R: