functionName
Name of a function of which a function 'handle' is the 'handle'.
(fname)=functionName(funcHandle)
Inputs
funcHandle A function handle (obtained by an expression of the form f=@func ).
Outputs
fname The name of the function of which funcHandle is the 'handle'.


Description
The function will also trivially return the name of a function if the latter is the input.
Example
>>a=@sin
>>functionName(a)
sin
>>functionName(cos)
cos