Collapsing Multiple Columns Containing the Same Variable into One Column Using R: Matrix Multiplication and tidyr Package

Understanding Data Transformation: Reshaping from Long to Wide Format with R

Reshaping Data from Long to Wide Format with the R reshape Package

Improving Data Reshaping for Advanced Analysis: Mixed Effects Models vs Traditional Linear Regression

Understanding the Warning in R's reshape2 Melt Function: Resolving Issues with ID Variables in Data Transformation

Matching Variables in R: A Step-by-Step Guide to Grouping Similar Variables Across Datasets