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: ft_realtime_signalproxy.m
    path of file: ./repos/fieldtrip/realtime/example
    
    the code of the file until where you have to start completion: function ft_realtime_signalproxy(cfg)

% FT_REALTIME_SIGNALPROXY creates some random data and writes it to a FieldTrip buffer.
%
% The FieldTrip buffer is a network transparent server that allows the acquisition
% client to stream data to it. An analysis client can connect to read the data upon
% request. Multiple clients can connect simultaneously, each analyzing a specific
% aspect of the data concurrently.
%
% Use as
%   ft_realtime_signalproxy(cfg)
% with the following configuration options
%   cfg.blocksize            = number, in seconds (default = 0.5)
%   cfg.channel              = cell-array with channel names
%   cfg.fsample              = sampling frequency
%   cfg.speed                = relative speed at which data is written (default = 1)
%   cfg.precision            = numeric representation, can be double, single, int32, int16 (default = 'double')
%
% The target to write the data to is configured as
%   cfg.target.datafile      = string, target destination for the data (default = 'buffer://localhost:1972')
%   cfg.target.dataformat    = string, default is determined automatic
%
% You can apply some filtering to the random number data to make it
% appear slightly more realistic with
%   cfg.lpfilter      = 'no' or 'yes'  lowpass  filter (default = 'no')
%   cfg.hpfilter      = 'no' or 'yes'  highpass filter (default = 'no')
%   cfg.bpfilter      = 'no' or 'yes'  bandpass filter (default = 'no')
%   cfg.lpfreq        = lowpass  frequency in Hz
%   cfg.hpfreq        = highpass frequency in Hz
%   cfg.bpfreq        = bandpass frequency range, specified as [low high] in Hz
%
% To stop this realtime function, you have to press Ctrl-C
%
% See also FT_REALTIME_SIGNALPROXY, FT_REALTIME_SIGNALVIEWER

% Copyright (C) 2009-2011, Robert Oostenveld
%
% This file is part of FieldTrip, see http://www.fieldtriptoolbox.org

    
function ft_realtime_signalproxy(cfg)

% FT_REALTIME_SIGNALPROXY creates some random data and writes it to a FieldTrip buffer.
%
% The FieldTrip buffer is a network transparent server that allows the acquisition
% client to stream data to it. An analysis client can connect to read the data upon
% request. Multiple clients can connect simultaneously, each analyzing a specific
% aspect of the data concurrently.
%
% Use as
%   ft_realtime_signalproxy(cfg)
% with the following configuration options
%   cfg.blocksize            = number, in seconds (default = 0.5)
%   cfg.channel              = cell-array with channel names
%   cfg.fsample              = sampling frequency
%   cfg.speed                = relative speed at which data is written (default = 1)
%   cfg.precision            = numeric representation, can be double, single, int32, int16 (default = 'double')
%
% The target to write the data to is configured as
%   cfg.target.datafile      = string, target destination for the data (default = 'buffer://localhost:1972')
%   cfg.target.dataformat    = string, default is determined automatic
%
% You can apply some filtering to the random number data to make it
% appear slightly more realistic with
%   cfg.lpfilter      = 'no' or 'yes'  lowpass  filter (default = 'no')
%   cfg.hpfilter      = 'no' or 'yes'  highpass filter (default = 'no')
%   cfg.bpfilter      = 'no' or 'yes'  bandpass filter (default = 'no')
%   cfg.lpfreq        = lowpass  frequency in Hz
%   cfg.hpfreq        = highpass frequency in Hz
%   cfg.bpfreq        = bandpass frequency range, specified as [low high] in Hz
%
% To stop this realtime function, you have to press Ctrl-C
%
% See also FT_REALTIME_SIGNALPROXY, FT_REALTIME_SIGNALVIEWER

% Copyright (C) 2009-2011, 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/>.
%
% $Id$

% set the defaults
if ~isfield(cfg, 'target'),               cfg.target = [];                                  end
if ~isfield(cfg.target, 'headerformat'),  cfg.target.headerformat = [];                     end % default is detected automatically
if ~isfield(cfg.target, 'dataformat'),    cfg.target.dataformat = [];                       end % default is detected automatically
if ~isfield(cfg.target, 'datafile'),      cfg.target.datafile = 'buffer://localhost:1972';  end
if ~isfield(cfg, 'blocksize'),            cfg.blocksize = 0.5;                              end % in seconds
if ~isfield(cfg, 'channel'),              cfg.channel = ft_senslabel('eeg1020');            end