Search for a Method for a Generic Function

DESCRIPTION:

Search to see if a method exists for generic function f whose signature matches sig exactly.

USAGE:

existsMethod ( f , sig , where )

REQUIRED ARGUMENTS:

f
Name of the generic function.
sig
Signature of the method to search for.

OPTIONAL ARGUMENTS:

where
Database to search. Supply either an object defining a database or a number representing its position in the search path. If where is missing, all attached databases are searched.

VALUE:

Logical value. Returns TRUE only for methods that match signature sig exactly, FALSE otherwise.

SEE ALSO:

, , ,

EXAMPLES:

## is there a method for plot in which x = timeSeries?
existsMethod("plot", signature(x = "timeSeries"))
## returns T