How do I save data from a matlab GUI table onto a text file when the user clicks a pushback button on the same gui?

writetable(T) only saves data to a textfile in the same location as the program. I want to be able to give the user an option to enter his own text file name and location. Please suggest what code I should enter in my callback as shown:

   % --- Executes on button press in savebutton.
function savebutton_Callback(hObject, eventdata, handles)
% hObject    handle to savebutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

Answer 1

[Geoff Hayes]

Rahul - according to writetable, you can specify the full path along with the filename. So if you have a table T, then you would save it to some file as

 fullpathAndFilename = '/users/geoff/mytable.txt';
 writetable(T, fullpathAndFilename);

Try the above and see what happens!

[Rahul Pillai]

It didnt work as it generated "Undefined function 'write' for input arguments of type 'double'". I tried the above code using:

    % --- Executes on button press in savebutton.
function savebutton_Callback(hObject, eventdata, handles)
% hObject    handle to savebutton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
[filename, pathname] = uiputfile({'*.txt';'*.*'}, 'Save as');
if isequal(filename,0) || isequal(pathname,0)
   disp('User selected Cancel')
else
   disp(['User selected ',fullfile(pathname,filename)])
   path_file=fullfile(pathname,filename)
a=fopen(path_file,'wt');
fclose('all')
if filename < 0
  error('Failed to open file "%s" because "%s" was not given name:', filename, msg);
end  
T=get(handles.uitable1, 'data');
  writetable(T,filename)
end

Also, is there any way I can save multiple tables into a single text file? My UI has 3 tables in it with different columns and rows. uitable1 is just one of them. I want to be able to save all of these as an output for the user to open later into a single text file.

[Geoff Hayes]

Rahul - I don't understand your comment that it didn't work as it generated Undefined function 'write' for.... I see you used writetable so I'm not sure why you tried using write.

I don't think that you can save multiple tables into a single file, at least not with writetable. The documentation (for this function) doesn't seem to indicate that you can.

[Rahul Pillai]

The writetable function makes use of a write() function inside of it's code structure. When I made a call to writetable() the error generated pointed to this.

[Rahul Pillai]