Here is a complete version of the provided code with some improvements for better readability and maintainability:

Optimizing Data Merge and Sorting with Pandas: A Step-by-Step Guide Using Bash Script

Function as.Date Returns NAs Only in Some Rows When Dealing with Different Character Encodings in R Dates

Removing Duplicate Rows in DataFrames: Best Practices and Alternative Methods

Converting Matrices to 1D Arrays: A Comprehensive Guide

Resolving the Undefined Reference Error in GDAL / SQLite3 Integration

Understanding data.table's Behavior with ecdf and Column Selection: Best Practices for Efficient Code

Creating a New Dummy Variable Based on Existing Dummy Variable Values in R using dplyr Package

Finding Missing Values in a List of Lists: A Comprehensive Guide with R

Splitting Strings with Gaps Using Different Methods in R