Error using ls - no such file or directory

Im trying to run a script i recived from my Professor. Hi showed me how to lunch it. He runs matlab on windows. I have a mac M1 with BigSur.

He told me just to add in the line of the "path" and the line of "pathres" my folder path to the file i want to examine with the script and the path where i want to save the results.

This is the beginnin of the script.

clear
close all

path = '/Users/suadvejselovski/Docu/MATLAB/Matlab_work/Dafare';
pathres = '/Users/suadvejselovski/Docu/MATLAB/Matlab_work/AnalizzatiSuad';
filelist = ls ([path '*.csv']);
analized_rawdata = {};
analized_data = {};

this is the error:

Error using ls (line 47)
ls: /Users/suadvejselovski/Docu/MATLAB/Matlab_work/Dafare*.csv: No such file or directory


Error in lookDataSegments (line 6)
filelist = ls ([path '*.csv']);

[Stephen23]

Do NOT just add slashes yourself!

The correct approach is to use FULLFILE, which will automatically use the correct file separator character for your OS:

https://www.mathworks.com/matlabcentral/answers/1669694-error-using-ls-no-such-file-or-directory#answer_915749

Using the output from DIR is generally easier than using the output from LS.

Answer 1

[Image Analyst]

Use fullfile() and do NOT use path as the name of your variable:

folder = '/Users/suadvejselovski/Docu/MATLAB/Matlab_work/Dafare';
if ~isfolder(folder)
    errorMessage = sprintf('Error: folder does not exist:\n%s', folder);
    uiwait(errordlg(errorMessage));
    return;
end
filePattern = fullfile(folder, '*.csv')'
filelist = ls(filePattern);

[Image Analyst]

See the FAQ:

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

Answer 2

[Cris LaPierre]

Add one more forward slash to terminate your variable path

path = '/Users/suadvejselovski/Docu/MATLAB/Matlab_work/Dafare/';
%                                                            ^ added here
filelist = ls ([path '*.csv']);

[Suad Vejselovski]

thanks the error is solved but i have a new error now:

>> lookDataSegments
Error using importdata (line 139)
Unable to open file.

Error in lookDataSegments (line 17)
    data = importdata([path filename]);

what i have to do ?

[Cris LaPierre]

Can you open the file in MATLAB manually? If so, inspect the result of your concatenation:

[path filename]

Is it correct?

Also +1 to image analyst's comment to use fullfile instead.