Are the cell arrays in the Image field the correct sizes? why am i wrong?

folders = dir("photos");
folders = string({folders.name});
folders = folders(~startsWith(folders,"."))

% Preallocate the structure crashImages
crashImages(length(folders)) = struct("Name",folders(end),"Images",cell(1));

for k = 1:length(folders)
    photos = dir("photos\" + folders(k));
    photos = string({photos.name});
    photos = photos(~startsWith(photos,'.'));
    
    % preallocate the cell array images
    images = cell(length(photos),1);
    
    for kk = 1:length(photos)
        im = imread("photos\" + folders(k) + "\" + photos(kk));
        images{kk} = im;
    end
    
    crashImages(k).Name = folders(k);
    crashImages(k).Images = images;
    
    clear images
end

crashImages

[Stephen23]

It is simpler and more robust to explicitly remove only the '.'and '..' names, and only keep folders' names (by using the isdir field):

S = dir('photos');
F = setdiff({S([S.isdir]).name},{'.','..'})

Answer 1

[Harsha Priya Daggubati]

Hi,

Can you provide more information on what is not turning out as expected or the error you are getting.

[Stephen23]

Cetengfei Zhang's "Answer" moved here:

Hi, I am wondering if you solved this problem. Because I am also stucked in this section with 99% completion.

This question detail is from the Matlab self-paced course: Matblab Programming Techniques. 4.3 Preallocation: (6/6) Preallocation of Structure and Cell Arrays. task 2.

Preallocate memory for the cell array 'images' that is created within the outer for loop

However I always get error even the official solution is used.

[Karla Ramirez]

Hi!

I had the same issue and I opened a thechnical support case reporting the problem, and they told me that it was a known issue and that they are working on it.

The solution is to replace every instance of "\" with "/". Thats where the problem is.

Have a nice day.