system2 memanggil perintah OS yang ditentukan oleh perintah.
system2(command, args = character(),
stdout = "", stderr = "", stdin = "", input = NULL,
env = character(), wait = TRUE,
minimized = FALSE, invisible = TRUE, timeout = 0)| Parameter | Deskripsi |
|---|---|
command |
the system command to be invoked, as a character string. |
args |
a character vector of arguments to command. |
stdout, stderr |
where output to stdout or stderr should be sent. Possible values are "", to the R console (the default), NULL or FALSE (discard output), TRUE (capture the output in a character vector) or a character string naming a file. |
stdin |
should input be diverted? "" means the default, alternatively a character string naming a file. Ignored if input is supplied. |
input |
if a character vector is supplied, this is copied one string per line to a temporary file, and the standard input of command is redirected to the file. |
env |
character vector of name=value strings to set environment variables. |
wait |
a logical (not NA) indicating whether the R interpreter should wait for the command to finish, or run it asynchronously. This will be ignored (and the interpreter will always wait) if stdout = TRUE or stderr = TRUE. When running the command asynchronously, no output will be displayed on the Rgui console in Windows (it will be dropped, instead). |
timeout |
timeout in seconds, ignored if 0. This is a limit for the elapsed time running command in a separate process. Fractions of seconds are ignored. |
minimized, invisible |
arguments that are accepted on Windows but ignored on this platform, with a warning. |
minimized |
logical (not NA), indicates whether the command window should be displayed initially as a minimized window. |
invisible |
logical (not NA), indicates whether the command window should be visible on the screen. |