find the root directory of a directory in r

To find the root directory of a directory in R, you can use the normalizePath() function along with the file.path() function. The normalizePath() function resolves a path to an absolute path, and file.path() concatenates elements of a path.

Here is an example of how to find the root directory of a directory named my_directory:

main.r
# Set working directory
setwd('/path/to/my_directory/')

# Get absolute path of current directory
abs_path <- normalizePath(getwd())

# Split path into individual elements
path_parts <- strsplit(abs_path, split = '[/\\\\]')[[1]]

# Determine root directory
root_dir <- file.path('/', path_parts[2])
299 chars
12 lines

In this code, abs_path gets the absolute path of the current directory using getwd() and normalizePath(). path_parts splits the path into individual elements based on forward slashes and backslashes using strsplit(). Finally, root_dir concatenates the root directory and the second element of path_parts using file.path().

Note that the file.path() function correctly handles path separators for the current operating system. On Unix-like systems, it uses forward slashes, whereas on Windows, it uses backslashes.