Create Unique Names for (Temporary) Files

Usage

tempfile(pattern = "file")

Arguments

pattern a character vector giving the initial part of the name.

Value

A character vector giving the names of possible (temporary) files. The names are certain to be unique among calls to tempfile in an R session. Note that no files are generated by tempfile.

See Also

unlink for deleting files.

Examples

## One possibility of getting ALL environment variables;
## compare with `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)
{

## One possibility of getting ALL environment variables;
## compare with `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()

     fun()

[Package Contents]