function out = myNewFunc(fun)
val = str2double(regexp(func2str(fun),'\d+$','once','match'));
out = sprintf('It is my %s function!',num2ord(val));
end
Tested:
>> myNewFunc(@myfunc3)
ans =
It is my 3rd function!
See also:
Tip: rather than creating numbered functions, which will be hard to access and just clutter up the workspace, you might like to consider simply creating a cell array of function handles (which can be trivially accessed using indexing):
C = {@(...)..., @(...)..., ...} % define
C{1}(...) % call the first function
