Aggregating Data Programmatically in data.table: A Comprehensive Guide to Sum, Mean, Max, and Min Operations

Renaming Multiple Aggregated Columns Using Data.table in R: A Flexible Solution

How to Calculate Mean Scores for Each Group and Class Using Pandas, List Comprehension, and Custom Functions

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

Using the Value of a Variable Which Is Just Created in data.table

Infering Data Types in R: A Step-by-Step Guide to Correct Column Typing

Removing All Data Points Where First Row Exceeds Specific Threshold by Client ID Grouping with data.table Package in R

Assignment by Reference in R's Data Table: A Common Pitfall to Avoid When Aggregating Data

Ranking Observations Across Multiple Groups Using R's Data Table Package

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