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

Efficient Data Manipulation in R: Grouping Multiple Files and Creating New Columns

Writing Data to an Existing File without Overwriting: Append by Columns using fwrite() and Alternative Approaches for Data Integrity

Understanding the Performance Difference Between lapply and Hardcoding in data.table: A Performance Comparison Guide

Flagging Rows in a Group Using Data Table in R

How to Create Equal Number of Rows for Observations in Data.tables Using R

Removing Duplicate Rows from Data Tables: A Practical Guide with R's data.table Package

Splitting Columns and Reserving Column Names with R's Data Tables Package

Replacing NA Values with '-' Dynamically in Data.tables Using Cumulative Sum

Using the data.table Package for Efficient Data Manipulation: Adding a Vector of Values as a Column