Calculating Percentages from a DataFrame with Multiple Species, Treatments, and Variables using dplyr: A Step-by-Step Guide to Correct Grouping and Percentage Calculation

Data Summarization and Grouping with Dplyr in R: A Comprehensive Guide

Repeating Observations by Group in data.table: An Efficient Approach

Writing Per-Variable Counts with Data.tables in R: Efficient CSV File Output Using l_ply Function