Calculating Mean of Categorical Variables with dplyr Package in R: A Step-by-Step Guide

Sampling a Subset of DataFrame by Group with Sample Size Equal to Another Subset of the DataFrame

Collapsing a Dataset in R using dplyr with Weighted Mean as the Summarizing Function Using Loops

Optimizing Memory Usage when Working with Large XML Files in R: A Technical Guide for Data Scientists

Selecting Certain Observations Plus Before and After Dates Using R

Aggregating Data with R: A Comparative Analysis of plyr, dplyr, and data.table

Calculating Standardized Distance Measures on Subset of Data Without First Saving Subset as New DataFrame

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