Mastering Tidyr's Spread Function: Overcoming Variable Selection Challenges

Evaluating a Model on Test Data: A Creative Solution Without Group By

Maintaining Column Order in tidyr's spread() Function: A Comparative Analysis of Two Approaches

Saving Data Frames into Separate CSVs in R: A Comprehensive Guide

Reshaping a Wide Dataframe to Long in R: A Step-by-Step Guide Using Pivot_longer and pivot_wider