Modifying a Column to Replace Non-Matching Values with NA Using Regular Expressions and the stringr Package in R

Finding the Index and Value of Non-NA List Elements in R Lists Using Various Approaches

Merging Dataframes in R Using Split, Reduce, and Cbind: A Step-by-Step Guide

Relative Reference Operations in Large Datasets Using Data Tables

Finding NA Cells by Conditions and Assigning Values Based on Other Conditions: A Step-by-Step Guide to Filling Missing Values in R.

Replacing NA Values in One DataFrame with Values from Another Based on Date and City: A Comparative Approach Using dplyr and Base R

Understanding Missing Values in R DataFrames: A Practical Guide to Handling NAs in Your Data

Understanding the Power of `na.omit` in R's Data Tables: A Workaround to Avoid Errors

How to Fill NAs Using mutate in R's dplyr Package

Removing NA from a Dataframe Column in R: A Comprehensive Guide to Cleaning Your Data.