Grouping Data to Replace Missing Values with Corresponding Non-NA Values Using tidyr's fill Function

Mastering Conditional Statements in R: A Guide to if and ifelse

Losing Duplicate Column Names when Flattening List-of-Lists into Dataframes in R

How to Flatten Lists of Data Frames into a Single DataFrame with Actual Values for Multiple Time Series Datasets.

How to Replace NAs with Character Pattern in Tidyverse and Remove Entire Rows if No Match is Found

Calculating Time Difference in R by Group Based on Condition Using dplyr and lubridate Packages

Merging a List of Data Frames in R: A Solution Using rbindlist and .id Argument

Reformatting Zero Values in Python Dataframe Columns

Moving Patterns with stringr: How to Append Patterns to Strings in R

Efficiently Merge Data Frames Using R's dplyr Library for Age Group Assignment