Using eval to Dynamically Add Columns to a Contingency Table in R

Replacing Values in Columns with data.table in R: Lapply vs Set

Mastering mapply for Efficient Data Manipulation in R

Deleting Columns in R's data.table Package: A Comparative Analysis of Approaches

Resolving Unused Argument Errors While Grouping within Functions in R

Replacing Missing Values in R Data Tables with Average Values from Preceding and Next Value

Selecting Highest Values per Group using R's data.table Package

Efficiently Calculating New Data.table Columns by Row Values in R