how do I allow user to choose a folder to run the rest of the functions?

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Shu Yi Ho 2019-8-14

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https://ww2.mathworks.cn/matlabcentral/answers/476070-how-do-i-allow-user-to-choose-a-folder-to-run-the-rest-of-the-functions

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%% ACCESS ALL IMAGES IN THE FOLDER
imageFolder = dir('C:\Users\85042513\MATLAB\Projects\BAT CVE\Images\NG\*.jpg');
numfiles = length(imageFolder);
ori_roi = cell(numfiles, 1);
i = 1;
filename = strcat('C:\Users\85042513\MATLAB\Projects\BAT CVE\Images\NG\',imageFolder(i).name);
originalImage = imread(filename);
%% LOOP THROUGH ALL IMAGES IN THE FOLDER & RUN ALL THE 5 FUNCTIONS
for i=1:length(imageFolder)
    tic
        functionError = 0;
        
        filename = strcat('C:\Users\85042513\MATLAB\Projects\BAT CVE\Images\NG\',imageFolder(i).name);
        originalImage = imread(filename);
        ori_roi{i} = originalImage( rect(2) : (rect(2)+rect(4)) , rect(1) : (rect(1)+rect(3)) , : );
        
        fprintf("Image name: %s\n",imageFolder(i).name);
        
        ...