Transforming Longitudinal Data for Time-to-Event Analysis in R: Simplifying Patient Conversion Handling

Understanding the Problem: Filling Cells with NAs at the Intersection of a Row and a Column Using Vectorized Operations and Matrix Indexing in R Programming Language

Simplifying Complex Data: A Step-by-Step Guide to Creating Individual Records from Repeated Quantities

Creating a Variable Indicating the Onset of an Event in Panel Data Using R: A Flexible and Efficient Approach