In this video you will learn how to navigate your file system programmatically with R. All the necessary concepts are explained clearly by using tree representations of file system.
To that end, you will learn what an absolute and a relative file path is and how to use it with the following functions in R:
getwd()
setwd()
list.files()
list.dirs()
file.info()
...
https://www.youtube.com/watch?v=twiac_hSSGQ