file.path: Construct Path to File

Description

Construct the path to a file from components in a platform-independent way.

Usage

file.path(…, fsep = .Platform$file.sep)

Arguments

…

character vectors.

fsep

the path separator to use.

Value

A character vector of the arguments concatenated term-by-term and separated by fsep if all arguments have positive length; otherwise, an empty character vector (unlike paste).

Details

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 R_LIBS with 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 / or \ is removed.