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

How to Pass a List of Columns to data.table's CJ Function as a Vector

Understanding the Performance Difference Between lapply and Hardcoding in data.table: A Performance Comparison Guide

Troubleshooting `could not find function "setalloccol"` in R with expss and data.table Packages.

Overcoming Binary Operator Errors in Subsetted Data.tables: 4 Alternative Solutions

Aggregating Data Over Combinations of Columns with data.table

Understanding Data.table Vectorized Functions and Column References

Applying Functions to Specific Columns in a data.table: A Powerful Approach to Data Manipulation