Understanding Data Aggregation in R: A Comprehensive Guide

Creating a Group Index for Values Connected Directly and Indirectly Using R's igraph Library

Reshaping Data from Long to Wide Format Using R's reshape2 Package

Mastering Data Frame Joins in R: A Comprehensive Guide to Inner, Outer, Left, Right, Cross, and Multi-Column Merges

Mastering Data Frame Merging in R: A Comprehensive Guide to Joining Datasets with Ease

Performing a Left Join on Two Data Frames Using Less-Than and Greater-Than Conditions in R with dplyr

Reading Only Selected Columns from a CSV File Using R

Replacing NAs with the Latest Non-NA Value Using R's zoo Package