Rolling Window Summation on Daily Data for Many Companies' Prices Over 11 Months

Grouping Occurrences by Year in a Pandas DataFrame: A Step-by-Step Guide

Working with Datetime Indexes in Pandas: A Deep Dive into Error Handling and Optimization

Merging Duplicate Rows in a Pandas DataFrame Using the `isnull()` Method

Here is the code based on the specifications provided:

Overcoming R's ifelse() Limitations: A Comprehensive Guide to Multiple Actions in Vectorized Operations

Improving Query Performance of a Union Search View When Querying Just One Table: 5 Proven Strategies

Understanding the Limitations of Calling R Functions using do.call()

Getting the Top N Most Frequent Values Per Column in a Pandas DataFrame Using Different Methods

Passing Column Name as Parameter to data.table::setkey() When Some Columns Are Not in the Data.Table: col_name