Creating a New Column in R Conditioned on Values in Another Column and Row Using dplyr or Base R

Subsetting a Repetitive Indexed Dataframe Using Values from a Non-Repetitive but Similarly Indexed Smaller Dataframe in R with Base R and dplyr Libraries

Removing Specific Words or Patterns from Vectors in R Using stringr Package and Regular Expressions

Solving Data Frame Merger and Basic Aggregation using R

Converting Data from Rows to Matrix in R: A Comprehensive Guide

Extracting Coordinates from XML Data in R: A Simple Solution Using tidyverse

How to Add a Secondary Legend for `geom_segment` in ggplot2 Using R

Change Colour of Line in ggplot2 in R Based on a Category

How to Group DataFrames, Handle Missing Data, and Sum Values Using Pandas GroupBy Function

Transforming Data from Long to Wide Format Using R's tidyr Package