Unpacking varargin to individual variables
- by Richie Cotton
I'm writing a wrapper to a function that takes varargin as its inputs. I want to preserve the function signature in the wrapper, but nesting varargin causes all the variable to be lumped together.
function inner(varargin) %#ok<VANUS>
% An existing function
disp(nargin)
end
function outer(varargin)
% My wrapper
inner(varargin);
end
outer('foo', 1:3, {}) % Uh-oh, this is 1
I need a way to unpack varargin in the outer function, so that I have a list of individual variables. There is a really nasty way to do this by constructing a string of the names of the variables to pass the inner, and calling eval.
function outer2(varargin) %#ok<VANUS>
% My wrapper, second attempt
inputstr = '';
for i = 1:nargin
inputstr = [inputstr 'varargin{' num2str(i) '}']; %#ok<AGROW>
if i < nargin
inputstr = [inputstr ', ']; %#ok<AGROW>
end
end
eval(['inner(' inputstr ')']);
end
outer2('foo', 1:3, {}) % 3, as it should be
Can anyone think of a less hideous way of doing things, please?
