Understanding the Invisible Functionality of R: Mastering `$<-` and `withVisible()`

Mutating Variables in a data.table by Condition Using Two Variables in Long Format Data

Creating Grouped Barplots with NA Data in ggplot2: A Comprehensive Guide to Handling Missing Values

How to Get Next Row's Value from Date Column Even If It's NA Using R's Lead Function

Preserving Previous State and Optimizing Performance with Shiny's `checkboxGroupInput`

Grouping Files by Name Using Regex in R: A Step-by-Step Guide

Using purrr's map() Function with Character Vectors: A Guide to Avoiding Common Pitfalls

Markov Chain Variance Calculation: A Step-by-Step Guide

Mutate the Value Matching with the Column Name Using R

Extracting Values from a Variable with Multiple Levels of Another Variable in R