what changes can I make so that all files are selected automatically

[files,path] = uigetfile({'.txt'},'MultiSelect', 'on');
if iscell(files)
  for n = 1:length(files)
    data = importdata(fullfile(path,files{n})); % fullfile including path
    % save data
  end
else
  data = importdata(fullfile(path,files));
  % save data
end

Answer 1

[Cris LaPierre]

uigetfile does not have an option that automatically selects all files. Consider using uigetdir instead of uigetfile. You can then use dir to get every file in that folder. You can also use a wild card to extract just files that match a pattern.

[Manav Divekar]

Can you tell how write dir instead uigetfile using this logic.

[Cris LaPierre]

You can find a good example for loading all *.xlsx files in a folder here.

You would use uigetdir to get the path to the folder. If you do not need the path to be dynamic, you can hardcode it without using uigetdir.

Make an attempt and, if you can't get it working, share the code you wrote along with any error messages you are getting (all the red text).