Set Edit Text Empty

I am programming GUI. In this GUI I have two edit text and a button. when I print to the button shows the result at the end of the invoice to the two edit text. the invoice period 2 to 3 minute. I want every time I print on Button set both Edit Text Empty and after the end of the statement shows the result in Edit Text I have the code written but set both Edit Text Empty does not work

function rechnen_button_Callback(hObject, eventdata, handles) 
set(handles.D_edit,'String',''); 
set(handles.P_end_edit,'String',''); 

here is the rest code

set(handles.D_edit,'String',D*1e3); 
set(handles.P_end_edit,'String',p_(1));

Answer 1

[Azzi Abdelmalek]

set(handles.D_edit,'String',num2str(D*1e3)); 
set(handles.P_end_edit,'String',num2str(p_(1)));

[Moh]

not necessarily need to convert number to string. my code works without "num2str". but set Edit Text Empty does not work.

[Azzi Abdelmalek]

Maybe you need to use the pause command to see the result

set(handles.D_edit,'String',''); 
set(handles.P_end_edit,'String',''); 
pause(3)

[Jan]

pause(3)? Why do you assume that waiting 3 seconds is useful?

Answer 2

[Moh]

that worked fine I have another solution with "drawnow"

set(handles.D_edit,'String',''); 
set(handles.P_end_edit,'String',''); 
drawnow;

thanks