| quit {base} | R Documentation |
The function quit or its alias q terminate the current
R session.
quit(save = "default", status = 0, runLast = TRUE)
q(save = "default", status = 0, runLast = TRUE)
.Last <- function(x) { ...... }
save |
a character string indicating whether the environment
(workspace) should be saved, one of "no", "yes",
"ask" or "default". |
status |
the (numerical) error status to be returned to the
operating system, where relevant. Conventionally 0
indicates successful completion. |
runLast |
should .Last() be executed? |
save must be one of "no", "yes",
"ask" or "default". In the first case the workspace
is not saved, in the second it is saved and in the third the user is
prompted and can also decide not to quit. The default is to
ask in interactive use but may be overridden by command-line
arguments (which must be supplied in non-interactive use).
Immediately before terminating, the function .Last()
is executed if it exists and runLast is true. If in
interactive use there are errors in
the .Last function, control will be returned to the command
prompt, so do test the function thoroughly.
Some error statuses are used by R itself. The default error
handler for non-interactive effectively calls q("no", 1,
FALSE) and returns error code 1. Error status 2 is used for R
‘suicide’, that is a catastrophic failure, and other small
numbers are used by specific ports for initialization failures. It
is recommended that users choose statuses of 10 or more.
Valid values of status are system-dependent, but 0:255
are normally valid.
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
.First for setting things on startup.
## Not run:
## Unix-flavour example
.Last <- function() {
cat("Now sending PostScript graphics to the printer:\n")
system("lpr Rplots.ps")
cat("bye bye...\n")
}
quit("yes")
## End(Not run)