Finding All Possible Solutions with Linear Programming in R Using Rglpk Package

Counting Missing Values from Two Columns in a R Data Frame

Understanding the Problem: A Modular Approach to Calculating Monthly Expenditures

Counting Specific Data in a Pandas DataFrame Using Various Methods

Handling DataFrames with Different Column Counts: A Powerful Approach Using tidyverse

Renaming Observations from String in Corresponding Column Using R

Here is a rewritten version of your response:

Understanding Row Naming in R DataFrames: A Guide to Avoiding Unintended Consequences When Removing Columns

Reading Text File into a DataFrame and Separating Content

Retaining Unique Values per Individual ID in a Dataframe in R Using ave and Duplicated Function