Conditional Row Removal in R data.table Using Multiple Conditions

Resolving Incorrect Group Values When Plotting in RStudio: A Step-by-Step Guide

Summarize Variables in a data.table using Objects: Two Solutions for Efficient Data Manipulation

Working with Data Tables in R: Mastering Column Assignments with data.table Package

How to Perform Random Sampling of Rows from a Data Table by Group Using data.table in R

Substituting Expressions into the `j` Element in Data.table with `data.table[, j, by]`