| list.files {base} | R Documentation |
These functions produce a character vector of the names of files in the named directory.
list.files(path = ".", pattern = NULL, all.files = FALSE,
full.names = FALSE, recursive = FALSE,
ignore.case = FALSE)
dir(path = ".", pattern = NULL, all.files = FALSE,
full.names = FALSE, recursive = FALSE,
ignore.case = FALSE)
path |
a character vector of full path names; the default
corresponds to the working directory getwd(). Missing
values will be ignored. |
pattern |
an optional regular expression. Only file names which match the regular expression will be returned. |
all.files |
a logical value. If FALSE, only the
names of visible files are returned. If TRUE,
all file names will be returned. |
full.names |
a logical value. If TRUE, the directory
path is prepended to the file names. If FALSE, only
the file names are returned. |
recursive |
logical. Should the listing recurse into directories? |
ignore.case |
logical. Should pattern-matching be case-insensitive? |
A character vector containing the names of the files in the
specified directories, or "" if there were no files. If a
path does not exist or is not a directory or is unreadable it
is skipped, with a warning.
The files are sorted in alphabetical order, on the full path
if full.names = TRUE. Directories are included only if
recursive = FALSE.
File naming conventions are platform dependent.
recursive = TRUE is not supported on all platforms and may be
ignored (with a warning).
Ross Ihaka, Brian Ripley
file.info, file.access
and files for many more file handling functions and
file.choose
for interactive selection.
glob2rx to convert wildcards (as used by system file
commands and shells) to regular expressions.
Sys.glob for wildcard expansion on file paths.
list.files(R.home())
## Only files starting with a-l or r
## Note that a-l is locale-dependent, but using case-insensitive
## matching makes it unambiguous in English locales
dir("../..", pattern = "^[a-lr]",full.names=TRUE, ignore.case = TRUE)