Warning Messages

Description

Generates a warning message that corresponds to its argument and the expression or function from which it was called.

Usage

warning(message)

Arguments

Details

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 top–level 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 top-level variable last.warning is created. It contains the warnings which can be printed via a call to warnings.

See Also

stop for fatal errors, warnings, and options(warn=..).

Examples