system_file
From pathological v0.1-1
by Richard Cotton
Find a file in a package
Wrapper to system.file
that returns standardized paths.
Usage
system_file(..., package = "base", library_location = NULL, must_work = FALSE, sep = c("/", "\\"))
Arguments
- ...
- Character vectors specifying subdirectories and files within some package. The default, none, returns the root of the package. Wildcards are not supported.
- package
- A string with the name of a single package. An error occurs if more than one package name is given.
- library_location
- a character vector with path names of R libraries.
See the 'Details section of
system.file
for the meaning of the default value of NULL. - must_work
- If
TRUE
, an error is given if there are no matching files. - sep
- String separator between directory levels in the output.
Value
-
A character vector of positive length, containing the file paths that
matched
...
, or a missing string, NA
, if none matched (unless
mustWork = TRUE
). (This behaviour for missing paths differs from
system.file
.)
If matching the root of a package, there is no trailing separator.
system.file() with no arguments gives the root of the base package.
See Also
Examples
# Examples taken from ?system.file
system_file() # The root of the 'base' package
system_file(package = "stats") # The root of package 'stats'
system_file("INDEX")
system_file("help", "AnIndex", package = "splines")
Community examples
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