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_zebris.m
    path of file: ./repos/fieldtrip/fileio/private
    
    the code of the file until where you have to start completion: function [fid, sens, label, sens_label] = read_zebris(Fname_zeb,skip)

% Reads Zebris files:
%   fiducials locations, and
%   either sensor file or headshape file or both
%
% FORMAT [fid, sens, label] = read_zebris(Fname_zeb,skip)
% Input:
% Fname_zeb  - Zebris ASCII file containing sensor locations (mm)
%             (headshape can also be considered here instead of sensors)
% skip       - first channels to skip
%
% Output:
% fid        - fiducial         locations (mm) in rows
% sens       - sensor/headshape locations (mm) in rows

    
function [fid, sens, label, sens_label] = read_zebris(Fname_zeb,skip)

% Reads Zebris files:
%   fiducials locations, and
%   either sensor file or headshape file or both
%
% FORMAT [fid, sens, label] = read_zebris(Fname_zeb,skip)
% Input:
% Fname_zeb  - Zebris ASCII file containing sensor locations (mm)
%             (headshape can also be considered here instead of sensors)
% skip       - first channels to skip
%
% Output:
% fid        - fiducial         locations (mm) in rows
% sens       - sensor/headshape locations (mm) in rows
% label      - labels of the fiducials
% sens_label - labels of the surface points, electrodes + headshape
%
% IMPORTANT: Note that Zebris data files should be -ASCII files with
% extension .sfp
% It is assumed that the .sfp file contains the location (mm) of fiducials
% (possibly twice), possibly followed by some additional named points for
% the electrodes, and then so more named location starting with 'sfl' for
% headshape locations.
% In some instances the first few channel locations may pertain to
% reference channels; the skip variable allows these to be skipped if
% necessary.
% The fiducial locations are flaged with the strings 'fidt9','fidnz' and
% 'fidt10'; indicating the leaft ear, nasion, and right ear, respectively.
% _________________________________________________________________________
% Copyright (C) 2008 Wellcome Trust Centre for Neuroimaging

% Christophe Phillips
% $Id$


% checks and assigments
%--------------------------------------------------------------------------
try, skip;    catch, skip    = 0; end