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: filter_with_correction.m
    path of file: ./repos/automaticanalysis/external/MRtools/Utilities
    
    the code of the file until where you have to start completion: function filt = filter_with_correction(B,A,dat,dir)

% FILTER_WITH_CORRECTION applies a to the data and corrects
% edge-artifacts for one-pass filtering.
%
% Use as
%   [filt] = filter_with_correction(B,A,dat,dir);
% where
%   B,A        filter coefficients
%   dat        data matrix (Nchans X Ntime)
%   dir        optional filter direction, can be
%                'onepass'         forward filter only
%                'onepass-reverse' reverse filter only, i.e. backward in time
%                'twopass'         zero-phase forward and reverse filter (default)
%                'twopass-reverse' zero-phase reverse and forward filter
%                'twopass-average' average of the twopass and the twopass-reverse
%
% Note that a one- or two-pass filter has consequences for the
% strength of the filter, i.e. a two-pass filter with the same filter
% order will attenuate the signal twice as strong.

% Copyright (c) 2010, Stefan Klanke
%
% 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

    
function filt = filter_with_correction(B,A,dat,dir)

% FILTER_WITH_CORRECTION applies a to the data and corrects
% edge-artifacts for one-pass filtering.
%
% Use as
%   [filt] = filter_with_correction(B,A,dat,dir);
% where
%   B,A        filter coefficients
%   dat        data matrix (Nchans X Ntime)
%   dir        optional filter direction, can be
%                'onepass'         forward filter only
%                'onepass-reverse' reverse filter only, i.e. backward in time
%                'twopass'         zero-phase forward and reverse filter (default)
%                'twopass-reverse' zero-phase reverse and forward filter
%                'twopass-average' average of the twopass and the twopass-reverse
%
% Note that a one- or two-pass filter has consequences for the
% strength of the filter, i.e. a two-pass filter with the same filter
% order will attenuate the signal twice as strong.

% Copyright (c) 2010, Stefan Klanke
%
% 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: filter_with_correction.m 7513 2013-02-20 16:54:20Z roboos $

poles = roots(A);
if any(abs(poles) >= 1)
  error('Calculated filter coefficients have poles on or outside the unit circle and will not be stable. Try a higher cutoff frequency or a different type/order of filter.');
end