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: cat_main1639.m
    path of file: ./repos/cat12
    
    the code of the file until where you have to start completion: function Ycls = cat_main1639(res,tpm,job)
% ______________________________________________________________________
% Write out CAT preprocessed data
%
% FORMAT Ycls = cat_main(res,tpm,job)
%
% based on John Ashburners version of
% spm_preproc_write8.m 2531 2008-12-05 18:59:26Z john $
%
% __________________________________________
    
function [Ycls,Ym,Ymi,Yp0b,Yb,Yl1,Yy,YMF,indx,indy,indz,qa,job] = cat_main_SPMpp(Ysrc,Ycls,Yy,job,res)
%% SPM segmentation input  
%  ------------------------------------------------------------------------
%  Here, DARTEL and PBT processing is prepared. 
%  We simply use the SPM segmentation as it is, without further modelling 
%  of the partial volume effect or other refinements. 
%  ------------------------------------------------------------------------
  
  NS = @(Ys,s) Ys==s | Ys==s+1;         % for side independ