Expand a path name, for example by replacing a leading tilde by the user's home directory (if defined on that platform).
path.expand(path)character vector containing one or more path names.
A character vector of possibly expanded path names: where the home directory is unknown or none is specified the path is returned unchanged.
(These details are for Windows: the details differ on Unix.)
The definition of the ‘home’ directory is in the rw-FAQ
Q2.14: it is taken from the R_USER environment variable when
path.expand is first called in a session.
The ‘path names’ need not exist nor be valid path names but prior to R 3.4.0 they needed to be representable in the session encoding.
# NOT RUN {
path.expand("~/foo")
# }
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