MATLAB: Avoid reading files in alphabetical order Matlab dir

MATLAB Compilermatlab function

Hi, I am trying to read all the text files in a folder to matlab. The naming of the files start from 1 to 30.ex: file1, file2, file3….file10,file11….file20,file21…file30..file33 When I use dir(fullfile(myFolder, '*.txt'), it forms a structure but reading the files in alphabetical order like file1,file10,file11,…file2,file20,…file3…. How can I avoid this. I need to read the files as they appear in the folder. Thanks

Best Answer

See this..

http://www.mathworks.com/matlabcentral/fileexchange/10959

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MATLAB: Read images from folder

See the code snippet in the FAQ:

https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Which you'd adjust like this:

% Specify the folder where the files live.
myFolder = fullfile(pwd, '..\TRAINING SET');
% 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, '*.BMP'); % 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

MATLAB: Error using imread (line 368) ; File “…” does not exist

Hi. change your current folder to myFolder:

cd(myFolder)

or use this:

im1 = imread([myFolder pngfiles(1).name])

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MATLAB: Read images from folder

MATLAB: Error using imread (line 368) ; File “…” does not exist

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