Temporary files

Source: R/tempfile.R

Temporarily create a tempfile, which is automatically removed afterwards.

with_tempfile(
  new,
  code,
  envir = parent.frame(),
  pattern = "file",
  tmpdir = tempdir(),
  fileext = ""
)

local_tempfile(
  new,
  envir = parent.frame(),
  pattern = "file",
  tmpdir = tempdir(),
  fileext = ""
)

Arguments

new

[character vector]
Names of temporary file handles to create.
code

[any]
Code to execute in the temporary environment
envir

[environment]
Environment in which to define the temporary files.
pattern

a non-empty character vector giving the initial part of the name.
tmpdir

a non-empty character vector giving the directory name
fileext

a non-empty character vector giving the file extension

Value

[any]
The results of the evaluation of the code argument.

See also

withr for examples

Examples

# check how big iris would be if written as csv vs RDS
with_tempfile("tf", {write.csv(iris, tf); file.size(tf)})
#> [1] 4821
with_tempfile("tf", {saveRDS(iris, tf); file.size(tf)})
#> [1] 1095