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_surf_createCS1445.m
    path of file: ./repos/ExploreASL/External/SPMmodified/toolbox/cat12/cat_run1445
    
    the code of the file until where you have to start completion: function [Yth1,S,Psurf,EC,defect_size] = cat_surf_createCS(V,V0,Ym,Ya,Yp0,YMF,opt)
% ______________________________________________________________________
% Surface creation and thickness estimation.
%
% [Yth1,S,Psurf,EC]=cat_surf_createCS(V,V0,Ym,Ya,YMF,opt)
%
% Yth1  = thickness map
% S     = structure with surfaces, like the left hemishere, that contains
%        vertices, faces, GM thickness (th1), and the transformation to
%        map to nifti space (vmat) and back (vmati).
% Psurf = name of surface files
% EC    = Euler characteristics
% defect_size = size of topology defects
% V     = spm_vol-structure of internally interpolated image
% V0    = spm_vol-structure of original image
% Ym    = the (local) intensity, noise, and bias corrected T1 image
% Ya    = the atlas map with the ROIs for left and right hemispheres
%        (this is generated with cat_vol_partvol)
% Yp0   = label image for surface deformation
% YMF   = a logical map with the area that has to be filled
%        (this is generated with cat_vol_partvol)
%   
% opt.surf       = {'lh','rh'[,'lc','rc']} - side
%    .reduceCS   = 100000 - number of faces
%
% Options set by cat_defaults.m
%    .interpV    = 0.5    - mm-resolution for thickness estimation
% 
% Here we used the intensity normalized image Ym, rather that the Yp0

    
function [Yth1,S,Psurf,EC,defect_size] = cat_surf_createCS(V,V0,Ym,Ya,Yp0,YMF,opt)
% ______________________________________________________________________
% Surface creation and thickness estimation.
%
% [Yth1,S,Psurf,EC]=cat_surf_createCS(V,V0,Ym,Ya,YMF,opt)
%
% Yth1  = thickness map
% S     = structure with surfaces, like the left hemishere, that contains
%        vertices, faces, GM thickness (th1), and the transformation to
%        map to nifti space (vmat) and back (vmati).
% Psurf = name of surface files
% EC    = Euler characteristics
% defect_size = size of topology defects
% V     = spm_vol-structure of internally interpolated image
% V0    = spm_vol-structure of original image
% Ym    = the (local) intensity, noise, and bias corrected T1 image
% Ya    = the atlas map with the ROIs for left and right hemispheres
%        (this is generated with cat_vol_partvol)
% Yp0   = label image for surface deformation
% YMF   = a logical map with the area that has to be filled
%        (this is generated with cat_vol_partvol)
%   
% opt.surf       = {'lh','rh'[,'lc','rc']} - side
%    .reduceCS   = 100000 - number of faces
%
% Options set by cat_defaults.m
%    .interpV    = 0.5    - mm-resolution for thickness estimation
% 
% Here we used the intensity normalized image Ym, rather that the Yp0
% image, because it has more information about sulci that we need 
% especialy for asymetrical sulci.
% Furthermore, all non-cortical regions and blood vessels were removed 
% (for left and right surface). Blood vessels (with high contrast) can 
% lead to strong error in the topology correction. Higher resolution 
% also helps to reduce artifacts.
% ______________________________________________________________________
% Robert Dahnke 
% Structural Brain Mapping Group
% University Jena
% ______________________________________________________________________
% $Id: cat_surf_createCS1445.m 1523 2019-11-21 23:12:24Z gaser $ 

% Turn off gifti data warning in gifti/subsref (line 45)
%   Warning: A value of class "int32" was indexed with no subscripts specified. 
%            Currently the result of this operation is the indexed value itself, 
%            but in a future release, it will be an error. 
warning('off','MATLAB:subscripting:noSubscriptsSpecified');

%#ok<*AGROW>
  dbs   = dbstatus; debug = 0; for dbsi=1:numel(dbs), if strcmp(dbs(dbsi).name,mfilename); debug = 1; break; end