You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: plus.m
    path of file: ./repos/matStats/matStats/@Table
    
    the code of the file until where you have to start completion: function res = plus(obj1, obj2)
% Overload the plus operator for Table objects.
%
%   RES = TAB1 + TAB2;
%   RES = plus(TAB1, TAB2);
%
%   Example
%     iris = Table.read('fisherIris.txt');
%     head(iris(:, 1) + iris(:,2))
%     ans = 
%              SepalLength+SepalWidth
%              ----------------------
%     1                           8.6
%     2                           7.9
%     3                           7.9
%     4                           7.7
%     5                           8.6
%     6                           9.3
%
%   See also
%     minus, times, mrdivide
%

% ------
% Author: David Legland
% e-mail: david.legland@inrae.fr
% Created: 2011-08-02,    using Matlab 7.9.0.529 (R2009b)
% Copyright 2011 INRA - Cepia Software Platform.

[obj1, obj2, parent, names1, names2] = parseInputCouple(obj1, obj2);


    
function res = plus(obj1, obj2)
% Overload the plus operator for Table objects.
%
%   RES = TAB1 + TAB2;
%   RES = plus(TAB1, TAB2);
%
%   Example
%     iris = Table.read('fisherIris.txt');
%     head(iris(:, 1) + iris(:,2))
%     ans = 
%              SepalLength+SepalWidth
%              ----------------------
%     1                           8.6
%     2                           7.9
%     3                           7.9
%     4                           7.7
%     5                           8.6
%     6                           9.3
%
%   See also
%     minus, times, mrdivide
%

% ------
% Author: David Legland
% e-mail: david.legland@inrae.fr
% Created: 2011-08-02,    using Matlab 7.9.0.529 (R2009b)
% Copyright 2011 INRA - Cepia Software Platform.

[obj1, obj2, parent, names1, names2] = parseInputCouple(obj1, obj2);

% error checking
if hasFactors(parent)
    error('Can not compute PLUS for table with factors');
end