swirl 2: Workspace and Files

getwd() getting working directory

ls() List all the objects in your local workspace using ls()

list.files() or dir()  List all the files in your working directory using list.files() or dir()

args() function on a function name is also a handy way to see what arguments a function can take.

dir.create() to create a directory

file.create() Create a file in your working directory called "mytest.R" using the file.create() function.

file.exists() Check to see if "mytest.R" exists in the working directory using the file.exists() function.

file.info() Access information about the file "mytest.R" by using file.info().

$ You can use the $ operator --- e.g., file.info("mytest.R")$mode --- to grab specific items.

file.rename() Change the name of the file "mytest.R" to "mytest2.R" by using file.rename().

file.copy() Make a copy of "mytest2.R" called "mytest3.R" using file.copy().

file.path() Provide the relative path to the file "mytest3.R" by using file.path().

> file.path("folder1","folder2")
[1] "folder1/folder2"

recursive

Take a look at the documentation for dir.create by entering ?dir.create . Notice the 'recursive'argument. In
| order to create nested directories, 'recursive' must be set to TRUE.

| Create a directory in the current working directory called "testdir2" and a subdirectory for it called "testdir3",
| all in one command by using dir.create() and file.path().

dir.create(file.path("testdir2","testdir3"),recursive = TRUE)

unlink() Delete the "testdir2" directory that you created by using unlink().

> unlink("testdir2", recursive = TRUE)

setwd(old.dir)