Calculate Mean Values for Duplicate Columns in R Data Frames

Improving Performance with data.table and dplyr: A Comparative Analysis of R's Data Manipulation Libraries

Merging Date Ranges with Zip Codes in R: A Step-by-Step Guide

Ranking IDs using Fail Percentage: A Solution with R and Dplyr

Summarizing Multiple Columns with dplyr: A Categorical Version

Weighted Mean Calculation in Data Tables Using SD Syntax

Comparing Values of a Certain Row with a Certain Number of Previous Rows in R's data.table

Transforming Data from Wide Format to Long Format with Regular Expressions and `pivot_longer()`

Assigning Values to First Rows of Groups in a data.table with R.