Need help with understanding this

Revise your assign05.m by adding the exist() function to print a message only if the data file is not available. The output should be the same as with assign05.m.

This is a question for an assignment I have, how would I do this? I don't really understand what she wants us to do

[Star Strider]

Reading the documentation on the exist() function should help you understand.

Answer 1

[Image Analyst]

Hint:

if ~exist(filename............  % Use the 'file' option
    % Alert user that the file is not found.
    message = sprintf(............ 
    uiwait(errordlg(...............
    return;
end

That should be plenty for you to complete the assignment.