is_installed | R Documentation |
Is an external program installed?
is_installed(program)
program |
Name of the program. |
TRUE
on success,
FALSE
otherwise.
Other logical helpers:
get_run_r_tests()
,
is_batch()
,
is_cran()
,
is_false()
,
is_force()
,
is_not_false()
,
is_null_or_true()
,
is_of_length_zero()
,
is_r_cmd_check()
,
is_r_package_installed()
,
is_running_on_fvafrcu_machines()
,
is_running_on_gitlab_com()
,
is_success()
,
is_version_sufficient()
,
is_windows()
Other operating system functions:
clipboard_path()
,
file_copy()
,
file_save()
,
get_boolean_envvar()
,
get_run_r_tests()
,
is_r_package_installed()
,
is_success()
,
is_windows()
,
view()
,
vim()
,
wipe_tempdir()
,
with_dir()
if (is_running_on_fvafrcu_machines() || is_running_on_gitlab_com()) {
# NOTE: There are CRAN machines where neither "R" nor "R-devel" is in
# the path, so we skipt this example on unkown machines.
is_installed("R")
}
is_installed("probably_not_installed")
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.