Creating a New Column in a Pandas DataFrame Based on Condition from Another Column: A Step-by-Step Guide

Creating Conditional Variables in data.table without Known Column Names

Conditional Filtering with Dates in R's ifelse Statement

Optimizing Processing of For Loops in Python: A Vectorized Approach

Understanding the `if` Statement in R Functions with `exists()`

Understanding Lambda Functions in Python and their Usage with Pandas DataFrames: Mastering Conditional Logic for Efficient Data Analysis