| stop {base} | R Documentation |
stop stops execution of the current expression, prints the
message given as its argument, then executes an error action.
geterrmessage gives the last error message.
stop(message = NULL, call. = TRUE) geterrmessage()
message |
a character vector (of length 1) or NULL. |
call. |
logical, indicating if the call should become part of the error message. |
The error action is controlled by the current error handler set by
options(error=). The default behaviour (the NULL
error-handler) in interactive use is
to return to the top level prompt, and in non-interactive use to
(effectively) call q("no", status=1, runLast=FALSE).
geterrmessage gives the last error message, as character string
ending in "\n".
warning, restart to catch errors and retry,
and options for setting error handlers.
stopifnot for validity testing.
options(error = expression(NULL))# don't stop on stop(.) << Use with CARE! >>
iter <- 12
if(iter > 10) stop("too many iterations")
tst1 <- function(...) stop("dummy error")
tst1(1:10,long,calling,expression)
tst2 <- function(...) stop("dummy error", call. = FALSE)
tst2(1:10,long,calling,expression,but.not.seen.in.Error)
options(error = NULL)# revert to default