Working with Vectors and Data Frames in R: A Comprehensive Guide

Understanding NA Output from Sum of Numbers in R: Why It Happens and How to Fix It with NA.RM = T

Summarizing Data by Site Number with Multiple Site Entries Using aggregate and dplyr Packages

Calculating Cumulative Sum with Condition and Reset in R: A Practical Guide

Sum a Column Based on Condition in R Using Filter and Summarise Functions

How to Use IN Clause vs Correlated Subqueries in SQL Aggregate Functions