Understand R's S3 Object System and deepen your knowledge of R. This video breaks down base R object to the most fundamental aspects showing that a data.frame is just a list, a factor is an integer vector, and matrixes aren't real. Then learn how to write generic functions to create class specific functions using inheritance.

Resources:

Advanced R by Hadley Wickham https://advr.hadley.nz/basetypes.html
R for Data Science by Hadley Wickham & Garrett Grolemund https://r4ds.had.co.nz/vectors.html
Deep R Programming by Marek Gagolewski https://deepr.gagolewski.com/chapter/...

Timestamps:

0:00 Intro
0:32 Vectors & NULLs
0:55 Types are not classes
1:25 Lists are vectors too
3:40 The Posers
3:55 Poser: data.frame
5:30 Poser: matrix
7:21 Poser: factor
8:30 Class hierarchy
9:25 S3 function fundamentals
11:03 S3 dispatch example
12:55 Method inheritance
13:15 Geospatial example
15:00 Using inheritance
15:45 Wrap up