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: decode_modeeg.m
    path of file: ./repos/fieldtrip/realtime/example/private
    
    the code of the file until where you have to start completion: function [data, rem] = decode_modeeg(raw)

% DECODE_MODEEG takes a piece of the Modular EEG (OpenEEG) data
% stream from the serial port or bluetooth and decodes it.
%
% Use as
%  [dat, rem] = decode_modeeg(raw)
% where
%   raw = vector with bytes that was read from the serial port
%   dat = 6xN matrix with EEG values
%   rem = vector with remaining bytes that were not decoded
%
% The remaining bytes should be added to the raw data upon the next
% call.


    
function [data, rem] = decode_modeeg(raw)

% DECODE_MODEEG takes a piece of the Modular EEG (OpenEEG) data
% stream from the serial port or bluetooth and decodes it.
%
% Use as
%  [dat, rem] = decode_modeeg(raw)
% where
%   raw = vector with bytes that was read from the serial port
%   dat = 6xN matrix with EEG values
%   rem = vector with remaining bytes that were not decoded
%
% The remaining bytes should be added to the raw data upon the next
% call.

% Copyright (C) 2012, Robert Oostenveld
%
% This file is part of FieldTrip, see http://www.fieldtriptoolbox.org
% for the documentation and details.
%
%    FieldTrip is free software: you can redistribute it and/or modify
%    it under the terms of the GNU General Public License as published by
%    the Free Software Foundation, either version 3 of the License, or
%    (at your option) any later version.
%
%    FieldTrip is distributed in the hope that it will be useful,
%    but WITHOUT ANY WARRANTY; without even the implied warranty of
%    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%    GNU General Public License for more details.
%
%    You should have received a copy of the GNU General Public License
%    along with FieldTrip. If not, see <http://www.gnu.org/licenses/>.
%
% $Id$

packetsize = 17;


% ensure that it is an uint8 vector
if ~isa(raw, 'uint8')
  raw = uint8(raw);
end