reading all documents with a for loop

I have 750 pictures that I want to work on my code one by one. Their names are like

PetsD2TeC1_00000.jpg

PetsD2TeC1_00001.jpg

PetsD2TeC1_00002.jpg

...

PetsD2TeC1_00750.jpg

Please keep that in mind, there are zeros depending on how many digits the index number has.

Answer 1

[David Hill]

Assumig all the pictures are the same size.

for k=1:750
    A(:,:,:,k)=imread(sprintf('PetsD2TeC1_00%03d.jpg',k));%store all pictures in 4D matrix
end

Answer 2

[Image Analyst]

This gets asked several times per week. See the FAQ for code snippet

https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files?

Or, more general and able to handle numbers past 999, or whatever the exact number you have is:

% Specify the folder where the files live.
myFolder = 'C:\Users\yourUserName\Documents\My Pictures';
% Check to make sure that folder actually exists.  Warn user if it doesn't.
if ~isfolder(myFolder)
    errorMessage = sprintf('Error: The following folder does not exist:\n%s\nPlease specify a new folder.', myFolder);
    uiwait(warndlg(errorMessage));
    myFolder = uigetdir(); % Ask for a new one.
    if myFolder == 0
        % User clicked Cancel
        return;
    end
end
% Get a list of all files in the folder with the desired file name pattern.
filePattern = fullfile(myFolder, 'PETS*.jpg'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = 1 : length(theFiles)
    baseFileName = theFiles(k).name;
    fullFileName = fullfile(theFiles(k).folder, baseFileName);
    fprintf(1, 'Now reading %s\n', fullFileName);
    % Now do whatever you want with this file name,
    % such as reading it in as an image array with imread()
    imageArray = imread(fullFileName);
    imshow(imageArray);  % Display image.
    drawnow; % Force display to update immediately.
end