Mutating Variables in a data.table by Condition Using Two Variables in Long Format Data

Converting String Values into Frequency Count Using dcast() Function in R's data.table Package

Summing Array Rows in R Based on Conditions Using sapply() Function

The Behavior of R's Round Function: Uncovering the Truth Behind Floating-Point Arithmetic

Mastering Data.tables in R: A Comprehensive Guide to Efficient Data Management

Fixing Missing Months in Data Frames: A Step-by-Step Guide to Ensuring Complete Date Ranges