Mastering Subsetting Within Functions in R: Avoiding Common Pitfalls and Gotchas

How to Subset a List of Dataframes Based on Dfs from Another List Using lapply and Semi-Join Functionality

How to Correctly Calculate the Nearest Date Between Events in R and Create a Control Group.

Checking if a Data Table is a Subset of Another Using R's `data.table` Package

Understanding the Aggregate Function in R: Avoiding Confusion with Subset Functions