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

Filling Missing Values in DataFrames Using R's Fill Function

Aggregating Daily Returns Across Multiple Dates in R

Grouping by ID and Outcome and Creating a Wide Format Output in R's Tidyverse Package: A Step-by-Step Guide to Achieving a Consecutive Number for Each New Phase of Recovery Per Patient.

Extracting Row Numbers and Values from R Matrix Sample Output Using names() Function

Creating a Counter Variable in R Grouped by ID that Conditionally Resets

Creating Sequence Indicators for Data Timing Changes in R Using data.table