You can use the uigetdir function to prompt the user to select a file directory, and then you can use the dir function to get a structure array with all of the file names in that directory:
selected_dir = uigetdir();
files = dir(selected_dir);
% File names are stored in the name field, for example: files(3).name
Or, if you want the user to select a specific file, you can use uigetfile, which also saves the path of the file so that you can use it to access other files on that path:
[selected_file, file_path] = uigetfile();
Does this help?
