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: read_ctf_trigger.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8/external/fieldtrip/fileio/private
    
    the code of the file until where you have to start completion: function [backpanel, frontpanel] = read_ctf_trigger(dataset)

% READ_CTF_TRIGGER reads the STIM channel from a dataset and detects
% the trigger moments and values
%
% [backpanel, frontpanel] = read_ctf_trigger(dataset)
% 
% This returns all samples of the STIM channel, converted to backpanel
% and frontpanel trigger values. Triggers are placed at the rising flank
% of the STIM channel.
%
% Triggers should be at least 9 samples long (for 1200Hz samplerate) and
% should not overlap each other.
%
% See also READ_CTF_MEG4, READ_CTF_RES4

% Copyright (C) 2003, Robert Oostenveld
%
% This file is part of FieldTrip, see http://www.ru.nl/neuroimaging/fieldtrip
% 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.
%

    
function [backpanel, frontpanel] = read_ctf_trigger(dataset)

% READ_CTF_TRIGGER reads the STIM channel from a dataset and detects
% the trigger moments and values
%
% [backpanel, frontpanel] = read_ctf_trigger(dataset)
% 
% This returns all samples of the STIM channel, converted to backpanel
% and frontpanel trigger values. Triggers are placed at the rising flank
% of the STIM channel.
%
% Triggers should be at least 9 samples long (for 1200Hz samplerate) and
% should not overlap each other.
%
% See also READ_CTF_MEG4, READ_CTF_RES4

% Copyright (C) 2003, Robert Oostenveld
%
% This file is part of FieldTrip, see http://www.ru.nl/neuroimaging/fieldtrip
% 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: read_ctf_trigger.m 7123 2012-12-06 21:21:38Z roboos $

[path, file, ext] = fileparts(dataset);
datafile   = fullfile(dataset, [file '.meg4']);
headerfile = fullfile(dataset, [file '.res4']);

% read the header from the raw CTF data
hdr = read_ctf_res4(headerfile);

% number of samples to shift the assesment of the trigger value
% this is needed because it takes some time for the rising flank to get to the correct value
trigshift = fix(hdr.Fs * 9/1200);

% read the stimulus channel from raw CTF data: with the new electronics
% control console used at NIH, there is now no longer any channel
% named "STIM". Instead, there are a variety of channel names. The
% electronics used at FCDC still uses the "STIM" channel.
stimindx = find(strcmp(hdr.label, 'UPPT001'));
if isempty(stimindx)
  stimindx = find(strcmp(hdr.label, 'USPT001'));
end