Understanding Data.table Differenced Operations with Dates in R

Extracting Last N Words from Character Columns in R Using Regular Expressions and String Manipulation

Renaming Multiple Aggregated Columns Using Data.table in R: A Flexible Solution

Creating a Counter Variable in R Grouped by ID that Conditionally Resets

Using eval to Dynamically Add Columns to a Contingency Table in R

Removing Grouping Variables with R: Efficient Data Table Wrangling Strategies

Handling Long Column Names with Symbols in R's Data Table Package

Data.table Filtering on Group Size with Value Matching While Considering Multiple Fields and Complex Queries

Assignment by Reference in R's Data Table: A Common Pitfall to Avoid When Aggregating Data

Performing Non-Equi Joins in R Using data.table Library