Replacing NAs Conditionally in a More Efficient Way with zoo Package

Understanding the Problem: Updating a Value in a Pandas DataFrame Based on Multiple Conditions

Boolean Indexing in Pandas: Efficiently Evaluating Multiple Conditions on DataFrames

Conditional Strings in R: Simplifying Code with Logical Values

Calculating Cumulative Sum with Condition and Reset in R: A Practical Guide

Conditional Forward Filling in Pandas DataFrame with Custom Conditions

Reordering a Factor in R Based on Values Corresponding to a Specific Level of a Subfactor of the Original Factor