Efficient Data Manipulation in R: Grouping Multiple Files and Creating New Columns

Calculating Min or Max Value Under Certain Cases with Vectors Using R's Data.Table Package

Using the data.table Package for Efficient Data Manipulation: Adding a Vector of Values as a Column

Using Data Tables with Function Application: Workarounds for Passing Columns into Functions

Subset of Data.table Excluding Specific Columns Using Various Methods in R

Unpacking and Rearranging Data in R: Exploring Alternative Approaches for Transforming Complex Data Formats

Substituting Expressions into the `j` Element in Data.table with `data.table[, j, by]`

Summarize Variables in a data.table using Objects: Two Solutions for Efficient Data Manipulation

How to Perform Random Sampling of Rows from a Data Table by Group Using data.table in R