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_vol_slice_overlay_rgb_ui.m
    path of file: ./repos/ExploreASL/External/SPMmodified/toolbox/cat12
    
    the code of the file until where you have to start completion: function cat_vol_slice_overlay_rgb_ui
% Wrapper to cat_vol_slice_overlay for overlaying
% 3 different images to a RGB overlay
%__________________________________________________________________________
% Christian Gaser
% $Id: cat_vol_slice_overlay_rgb_ui.m 1607 2020-04-17 22:52:07Z gaser $

clear global SO
global SO

% ---------------------------------------------------------------------------------------
% image array of max. 3 images
% ---------------------------------------------------------------------------------------
name = char(fullfile(spm('dir'),'toolbox','cat12','templates_volumes/cobra.nii'),...
            fullfile(spm('dir'),'toolbox','cat12','templates_volumes/mori.nii'),...
            fullfile(spm('dir'),'toolbox','cat12','templates_volumes/cat.nii'));

range = [0 1]; % this should be adapted to the image range
logP = 0;      % option to use log-scaled colorbars if the input is a log-transformed p-map

% ---------------------------------------------------------------------------------------
% underlying image
% ---------------------------------------------------------------------------------------
SO.img(1).vol = spm_vol(fullfile(spm('dir'),'toolbox','cat12','templates_volumes/Template_T1_IXI555_MNI152_GS.nii'));
SO.img(1).prop = 1;
SO.img(1).cmap = gray;
SO.img(1).range = [0.2 1];  % image range have to be adapted

% ---------------------------------------------------------------------------------------
% selection of slices
% ---------------------------------------------------------------------------------------
% this should be adapted
slices    = [{-42:3:52}, {-70:3:30}];
transform = str2mat('axial','coronal');
sl_name   = str2mat('axial: -42:3:59','coronal: -70:3:34');


    
function cat_vol_slice_overlay_rgb_ui
% Wrapper to cat_vol_slice_overlay for overlaying
% 3 different images to a RGB overlay
%__________________________________________________________________________
% Christian Gaser
% $Id: cat_vol_slice_overlay_rgb_ui.m 1607 2020-04-17 22:52:07Z gaser $

clear global SO
global SO

% ---------------------------------------------------------------------------------------
% image array of max. 3 images
% ---------------------------------------------------------------------------------------
name = char(fullfile(spm('dir'),'toolbox','cat12','templates_volumes/cobra.nii'),...
            fullfile(spm('dir'),'toolbox','cat12','templates_volumes/mori.nii'),...
            fullfile(spm('dir'),'toolbox','cat12','templates_volumes/cat.nii'));

range = [0 1]; % this should be adapted to the image range
logP = 0;      % option to use log-scaled colorbars if the input is a log-transformed p-map

% ---------------------------------------------------------------------------------------
% underlying image
% ---------------------------------------------------------------------------------------
SO.img(1).vol = spm_vol(fullfile(spm('dir'),'toolbox','cat12','templates_volumes/Template_T1_IXI555_MNI152_GS.nii'));
SO.img(1).prop = 1;
SO.img(1).cmap = gray;
SO.img(1).range = [0.2 1];  % image range have to be adapted

% ---------------------------------------------------------------------------------------
% selection of slices
% ---------------------------------------------------------------------------------------
% this should be adapted
slices    = [{-42:3:52}, {-70:3:30}];
transform = str2mat('axial','coronal');
sl_name   = str2mat('axial: -42:3:59','coronal: -70:3:34');

% Comment this out if you don't wish slice labels
SO.labels=[];

% ---------------------------------------------------------------------------------------
% ---------------------------------------------------------------------------------------
ind = 1;
nm = deblank(name(ind,:));
range = range(ind,:);
logP = logP(ind);

n = size(sl_name,1);
str = deblank(sl_name(1,:));
for i = 2:n, str = [str '|' deblank(sl_name(i,:))]; end