R Programming By Example

This chapter's required packages

This chapter will make use of the methods and R6 packages to load the S4 and R6 object models functionality. You should know that interactive R sessions load the methods by default, but non-interactive sessions don't, so you need to explicitly load it in such cases. The jsonlite and lubridate packages are brought to simplify some common tasks like getting data from JSON APIs and transforming dates. For more information, take a look at Appendix, Required Packages.

Package	Reason
R6	R6 object model
methods	S4 object model
lubridate	Easily transform dates
jsonlite	Retrieve data from JSON APIs