Desktop Survival Guide
by Graham Williams

Folders and Files

> getwd()			# Identify the current default working directory
> setwd("h:/work/")		# Change the current default working directory
> file.exists("filename")	# Returns TRUE if the file exists
> unlink("filename")            # Deletes the file or directory
> fname <- file.choose()        # An interactive file chooser.
> choose.dir()			# 
> dir <- tclvalue(tkchooseDirectory()) # GUI which requires library(tcltk).

MS/Windows paths use the backward slash to separate components. This is a problem since the backslash is used as a standard mechanism for introducing special characters within strings. Thus, R requires a double back slash or will seamlessly allow the use of the forward slash. A useful utility on a MS/Windows environment, where backslashes are used in paths, and R likes to have forward slashes, is the following (Duncan Golicher, 5 Jan 2006, r-help):

setwd.clip <- function()
  setwd(gsub("\\\\", "/",readLines("clipboard")))

Then, simply select a path into your clipboard (Ctrl-C), then in R call setwd.clip!

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