> 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).
List files in a folder in the order by modification time:
> lst <- file.info(dir())
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()
Then, simply select a path into your
then in R call setwd.clip:
R packages supply files and we can access them in a installation
independent way using system.file:
> system.file("csv", "audit.csv", package = "rattle")
We can view the contents of files in R using
> file.show(system.file("csv", "audit.csv",
package = "rattle"))
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