warnings
Saved Warning Messages
Description
Provides access to saved warning messages.
Usage
warnings(...)
Arguments
| ... |
arguments to pass to the function
cat when the returned object is printed.
The most likely useful argument is file=,
which redirects the warning printout to the specified file.
See cat for the possible arguments.
|
Details
This function is used if prior execution has generated and saved warning messages.
If the
warn option (see
options) has the value 0,
any warnings are saved in the variable
base::last.warning.
The
warnings function returns these saved warnings as an object
of class
"warnings".
Printing this object, done automatically at the end of a top-level expression
that generated warnings, prints the list of saved warnings.
Value
returns an object of class warnings if there are any saved warnings;
otherwise, returns NULL.
See Also
Examples
options(warn=0)
warning("foo")
# prints one warning
warnings()
# prints saved warnings again