## Startup and Closing Behavior

• Starting R: The R GUI versions, including RStudio, under Windows and Mac OS X can be opened by double-clicking their icons. Alternatively, one can start it by typing R in a terminal (default under Linux).

• Startup/Closing Behavior: The R environment is controlled by hidden files in the startup directory: .RData, .Rhistory and .Rprofile (optional).

• Closing R:

q()

Save workspace image? [y/n/c]:

• Note: When responding with y, then the entire R workspace will be written to the .RData file which can become very large. Often it is sufficient to just save an analysis protocol in an R source file. This way one can quickly regenerate all data sets and objects.

Create an object with the assignment operator <- or =

object <- ...


List objects in current R session

ls()


Return content of current working directory

dir()


Return path of current working directory

getwd()


Change current working directory

setwd("/home/user")


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