What is does this series offer? What is considered base R? Discuss the article What is does this series offer? This is the introduction to the R:case4base series. The aim of the series is to elaborate on very useful features of base R that are lesser known and many times substituted with custom functionality of external packages. The motivation behind the series is to provide useful and easy to read information on the usage of these functionalities from the basic to the advanced topics related to them.