| tempfile {base} | R Documentation |
Returns a vector of character strings which can be used as names for temporary files.
tempfile(pattern = "file")
pattern |
a non-empty character vector giving the initial part of the name. |
If pattern has length greater than one then the result is of the
same length giving a temporary file name for each component of
pattern.
The names are very likely to be unique among calls to tempfile
in an R session and across simultaneous R sessions. The filenames are
guaranteed not to be currently in use.
The file name is made of the pattern, the process number in hex and a
random suffix in hex. The filenames will be in the directory given by
the first found of the environment variables TMP, TEMP,
or "/tmp".
A character vector giving the names of possible (temporary) files.
Note that no files are generated by tempfile.
unlink for deleting files.
tempfile(c("ab", "a b c")) # give file name with spaces in!
## One possibility of getting ALL environment variables;
## compare with `Sys.getenv':
fun <- function() {
FILE <- tempfile("fun")
on.exit(unlink(FILE))
system(paste("printenv >", FILE))
x <- strsplit(scan(FILE, what = ""), "=")
v <- n <- character(LEN <- length(x))
for (i in 1:LEN) {
n[i] <- x[[i]][1]
v[i] <- paste(x[[i]][-1], collapse = "=")
}
structure(v, names = n)
}
fun()