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: spm_dartel_template.m
    path of file: ./repos/fieldtrip/external/spm12/toolbox/DARTEL
    
    the code of the file until where you have to start completion: function out = spm_dartel_template(job)

    
function out = spm_dartel_template(job)
% Iteratively compute a template with mean shape and intensities
% format spm_dartel_template(job)
%
% The outputs are flow fields, and a series of Template images.
%_______________________________________________________________________
% Copyright (C) 2008 Wellcome Trust Centre for Neuroimaging

% John Ashburner
% $Id: spm_dartel_template.m 4064 2010-09-03 12:57:10Z john $

code = 2;
st = job.settings;
K  = st.param(1).K;
n1 = numel(job.images);
n2 = numel(job.images{1});
NF = struct('NI',[],'vn',[1 1]);
NF(n1,n2) = struct('NI',[],'vn',[1 1]);

for i=1:n1,
    if numel(job.images{i}) ~= n2,
        error('Incompatible number of images');
    end