Construct the path to a file from components in a platform-independent way.
the path separator to use.
The implementation is designed to be fast (faster than
paste) as this function is used extensively in R itself.
It can also be used for environment paths such as PATH and
fsep = .Platform$path.sep.
Trailing path separators are invalid for Windows file paths apart from
‘/’ and ‘d:/’ (although some functions/utilities do accept
them), so as from R 3.1.0 a trailing
A character vector of the arguments concatenated term-by-term and
fsep if all arguments have positive length;
otherwise, an empty character vector (unlike
The components are by default separated by
\) on Windows.