getwd returns an absolute filepath representing the current
working directory of the R process;
setwd(dir) is used to set
the working directory to
A character string: tilde expansion will be done.
getwd returns a character string or
NULL if the working
directory is not available.
On Windows the path returned will use
/ as the path separator
and be encoded in UTF-8. The path will not have a trailing
unless it is the root directory (of a drive or share on Windows).
setwd returns the current directory before the change,
invisibly and with the same conventions as
getwd. It will give
an error if it does not succeed (including if it is not implemented).
Note that the return value is said to be an absolute filepath: there can be more than one representation of the path to a directory and on some OSes the value returned can differ after changing directories and changing back to the same directory (for example if symbolic links have been traversed).
list.files for the contents of a directory.
normalizePath for a ‘canonical’ path name.
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