Documentation

In MATLAB^®, varargin and varargout are cell arrays. For code generation, to index varargin and varargout, you must use a syntax that code generation supports. You can use the most common syntax — curly braces {}. For example:

%#codegen
function [x,y,z] = fcn(a,b,c)
[x,y,z] = subfcn(a,b,c);

function varargout = subfcn(varargin)
for i = 1:length(varargin)
   varargout{i} = varargin{i};
end

You can use the following index expressions. The exp arguments must be constant expressions or depend on a loop index variable.

Note:   The use of () is not supported for indexing into varargin and varargout arrays.