Subsetting Nominal Variables in R: A Comparative Analysis of Data.table, dplyr, and Base R

Subset Sublists of Nested List by Vector Condition in R: A Step-by-Step Guide

Understanding the Issue with Subsetting R Data Frame Results in Mysterious NA Rows

Merging Rows Based on Conditional Criteria in DataFrames Using SQL

How to Remove Rows with Missing Values from a Data Frame in R