How to Create New Columns Based on Start End Years in R Data Frames Using Basic Addition and Subtraction or dcast Function

Understanding the Benefits of Using Variables in the reshape2 Package: A Step-by-Step Guide to Mastering the cast Function

Reshape and Expand Dataframe in R: A Step-by-Step Guide

Reshaping Data to Plot in R using ggplot2

Reshaping Data in R: The Power of Two Value Variables in Cast Function