Conditional Statement for Evaluating and Creating New Columns in Dataframes

Conditional DataFrame Operations Using Pandas: A Custom Function Approach for Advanced Grouping and Aggregation

Pandas Conditional Fillna Based on Another Column Values

Creating a New Column in a Data Frame Based on Conditions and Values Using lag() + ifelse() in R Programming Language

Using Logical Expressions with the memisc Package: Best Practices and Alternatives

Marking Rows in a Data Frame as "TRUE" if Specific Number Inside Group Appears

When Second Condition is Met, First Condition Fails: A Pandas DataFrame Filtering Problem

Counting Columns Using R Based on Two Different Conditions: A Beginner's Guide

Conditional Ratio with Group By in Pandas: A Step-by-Step Solution