How to randomly present images

Hello!

I was wondering if anyone could help me create a code that will allow me to randomly present 5 images that are currently in a folder on my desktop called 'happy' and for the images to stay on screen for about 1 second. I would also like for the images to be able to repeat.

I also want to be able to have people answer an either or question after each image is presented so if anyone can attach a link to where I might find examples of this part of the code, let me know!

Thank you!

[DGM]

https://www.mathworks.com/matlabcentral/answers/333319-how-to-present-images-i-random-order

https://www.mathworks.com/matlabcentral/answers/498970-how-to-present-a-sequence-of-random-images-full-screen

https://www.mathworks.com/matlabcentral/answers/57300-how-to-read-display-multiple-images-from-a-folder

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Answer 1

[Voss]

% use your folder's path, and use your file type (.png, .jpg, whatever):
% img_files = dir(fullfile('C:\Users\ja-woo\Desktop\happy','*.png'));

% I'm using just the images I attached here:
img_files = dir('image_*.png');

N = numel(img_files); % number of image files

figure(); % create a figure where the images will be shown
idx = []; % this will store the index of each file used (1 through N)
answers = {}; % this will store the answers (Happy/Sad - you can change the options below)
while true
    new_idx = randi(N); % random integer from 1 to N
    imshow(imread(fullfile(img_files(new_idx).folder,img_files(new_idx).name))); % read and show the idx-th file
    pause(1); % pause for 1 second
    new_answer = questdlg('How does this image make you feel?','','Happy','Sad','Happy'); % ask the question and get the answer
    if isempty(new_answer) % if the user didn't answer, exit the loop (i.e., stop showing images and stop asking questions)
        break
    end
    idx(end+1) = new_idx; % add the latest image index to the array of indices
    answers{end+1} = new_answer; % add the latest answer to the array of answers
end

disp(idx); % show the indexes that were used (e.g., 1, 3, 1, 2, 5, 1, 4)
disp({img_files(idx).name}); % show the names of the files that were used (e.g., image_1.png, image_3.png, image_1.png, image_2.png, image_5.png, image_1.png, image_4.png)
disp(answers); % show the answers given (e.g., Happy, Sad, Happy, Happy, Sad, Sad, Happy)