Understanding Date and Time Formats in R: A Deep Dive

Using the `ddply` Function in R: A Comprehensive Guide to Date Manipulation and Aggregation

Selecting Columns from a Dataframe Using dplyr: A Better Approach Than Using Variable Names

Estimating Country-Industry and Industry-Year Fixed Effects in R Using the plm Package

How to Replace Missing Values with the Opposite of the First Non-Missing Value in Each Group Using zoo Package in R

Understanding Partial Matching in Named Lists: Mastering the $ Operator in R

Performing Group-By Operations on Another Column in R Using Dplyr Package

Extracting Specified Number of Words After a String in R Using stringr Package

Understanding the Problem: Ordering Levels of Multiple Variables in R

How to Add New Single-Character Variables to Lists of DataFrames in R Using Purrr and Dplyr