First, start an R session on your machine. As this recipe involves steps toward the file I/O, if the user does not specify the full path, read and write activity will take place in the current working directory. For working with databases, it is assumed you have working PostgreSQL on your system with some data.

You can simply type getwd() in the R session to obtain the current working directory location. However, if you would like to change the current working directory, you can use setwd("<path>"), where <path> can be replaced with your desired path, to specify the working directory.