Merge two text files using uiget

I have three text files in a directory called Open1.txt Open2.txt Open3.txt

I want to use a uiget to choose any two text files,

then merge those two files

and finally export the merged file as a text file.

My first part of the code is working but unable to merge the chosen two files and exporting them as a one text file. My snipet code is below

m=0;
while m<3
    m=menu('Options','load data','combine file','save file');
    if m==1 % Load .txt data
        [file, path] = uigetfile('*.Open*.txt',...
        'Select One or More Files', ...
        'MultiSelect', 'on');
        if isequal(file,0)
        disp('User selected Cancel');
        else
        disp(['User selected ', fullfile(path,file)]);
        end
        filepath=fullfile('path','file');
        fid = fopen('filepath');
        cd(path);
        dfilename=(['C:\Users\Folder\',file]);
    end
    
      
    if m==2 %Combine multiple txt files

[madhan ravi]

Select the code and press the code button so that it's easy to read.

[Luna]

You should be doing: (I didn't understand how it works btw)

fid = fopen(filepath);

% below is wrong syntax
fid = fopen('filepath');

[Avi Dutt-Mazumder]

I manged it, while thinking over it

The later part of the code is

    if m==2 %Combine multiple files
        Ofilestr='CombinedFile.txt'; % open an empty file to merge all
        fid = fopen(Ofilestr,'w');
        fclose(fid);
        
        for n = 1:numel(file)
            system(['type ' file{n} ' >> ' Ofilestr]);
        end
    end

Answer 1

[Akira Agata]

One possible solution would be like this.

Just FYI:

• Since menu function is not recommended in recent MATLAB versions, I have replaced it with questdlg function.
• I have removed 'combine file' option because the following code combines just after loading txt file when 'load data' was selected.

answer = 'load data';
txtData = cell(0);

while strcmp(answer,'load data')
  % Show the selection button
  answer = questdlg('What would you like to do?', ...
    'Options', ...
    'load data','save file','load data');

  if strcmp(answer,'load data')
    % Load data and combine
    [file, path, idx] = uigetfile('*.txt',...
      'Select One or More Files', ...
      'MultiSelect', 'off');
    if ~idx
      h = errordlg('User selected Cancel');
      uiwait(h);
    else
      fid = fopen(fullfile(path,file));
      c = textscan(fid,'%s','Delimiter','\n');
      txtData = [txtData; c{1}];%#ok
      fclose(fid);
    end
  else
    % Save the combined data as txt file
    [file2,path2] = uiputfile('*.txt');
    writetable(table(txtData),fullfile(path2,file2),...
      'WriteVariableNames',false);
  end
end