Getting the Most Out of Data Frames: Extracting Maximum Values with R

Repeating and Summarizing a Column Based on Multiple Other Columns: A Deep Dive into Tidyverse and Base R Methods

I can help you with that. However, I don't see a specific problem to solve in your request. You have provided several examples of using the `grepl()` function in R, but without a clear question or problem to solve.

Alternative R Code for Nested Comparison using sapply

How to Perform Vector Calculations Between Nested For Loops: Alternatives Explained

Removing SPEI Messages in a Loop: A Deep Dive into the Details