The goal of ExtendDataFrames is to demonstrate how to extend the data frames class in R in order to make a bespoke tabular data structure.
The package contains a toy class, a set of class generics and methods, and two ways of subsetting the custom class. The class is a subclass of a data frame. All of the code is meant for illustrative and explanatory purposes.
The package has two vignettes: the first a general guide to the package, the second is a longer-form post around the technical and functional aspects of programming with data frame subclasses.
You can install the development version of ExtendDataFrames from GitHub with:
# install.packages("pak")
pak::pak("joshwlambert/ExtendDataFrames")