Understanding the Behavior of the `%in%` Operator in R: How Data Types Affect Comparisons

Aggregating Data Programmatically in data.table: A Comprehensive Guide to Sum, Mean, Max, and Min Operations

Optimizing Data Table Operations: A Comparison of Methods for Manipulating Columns

Extracting First Non-NA Value for Each Group and Column in R Data.tables

Replacing Values in Columns with data.table in R: Lapply vs Set

Efficiently Calculating New Data.table Columns by Row Values in R

Extracting Values from Alternative Columns Using R's Melt Function