warning {base} | R Documentation |
warning
generates a warning message that corresponds to its
argument and the expression or function from which it was called.
warning(message)
message |
character string (of length 1) or NULL . |
The result depends on the value of
options("warn")
.
If warn
is negative warnings are ignored; if it is zero they
are stored and printed after the toplevel function has completed;
if it is one they are printed as they occur and if it is 2 (or larger)
warnings are turned into errors.
If warn
is zero (the default),
a toplevel variable last.warning
is
created. It contains the warnings which can be printed via a call to
warnings
.
stop
for fatal errors, warnings
,
and options(warn=..)
.