callback code for push_button in matlab GUI to stop fast iterations due to FOR loops in main program

I want to interrupt or break the program iterations (due to FOR loops in main program) in a GUI using a push_button. Can any one give me the precise pushbutton_callback code for the same. Your help will be greatly appreciated.

Thanks, K.D.Singh

Answer 1

[Dishant Arora]

function pushbutton_callback(hObject, eventdata, handles)
setappdata(0 , 'Flag', 0);

while your other script might be like this

setappdata(0 , 'Flag' , 1);
while(1)
    sprintf('in loop')
    Flag=getappdata(0,'Flag');
        if Flag == 0
            break;
        end
    drawnow 
end

[Keshav Dev Singh]

Dear Dishant, Thanks for your suggestion, but I am not getting where I have to put these scripts? Although I have used the same in my STOP push-button callback function (see below), but as I am pressing this STOP push-button my program's for loop iterations are not breaking and running continuously. Please let me know your idea? Thanks for your time...

function pushbutton_Callback(hObject, eventdata, handles) % hObject handle to pushbutton9 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) setappdata(0 , 'Flag' , 1); while(1) sprintf('in loop') Flag=getappdata(0,'Flag'); if status == 0 break; end drawnow end

[Dishant Arora]

You yourself said you have defined loop in the main program. Place the later part of code that i gave you in that program. Make changes as per your need like replacing while with for. And your pushbutton callback would only be:

setappdata(0 , 'Flag' , 0);  % to be mentioned under stop pushbutton callback

What you did wrong was putting the whole code under same pushbutton, that sets the Flag to 1 before entering into the loop making it go into infinite loop.

[Keshav Dev Singh]

Hello Dishant, I try the same as per your suggestion but still the GUI's STOP push_button is not working and my programs for loop iterations are continue as in previous case. I want to stop these iterations with my STOP push_button and later I will again resume iterations with my RUN push_button. Please let me know if you can help me in other way round. Your help is highly appreciated.

Regards, K.D.Singh

[Dishant Arora]

post your code. Attach you script files so that I can see what you did wrong.

[Keshav Dev Singh]

Hello Dishant, Please find my Main program script format and its corresponding GUI's STOP-push_button code (suggested by you) as following,

Main Program Script:

for phi=1:0.1:10 for e=1:0.1:10 for h=1:0.1:10 for Bo=1:0.1:10 for b1=1:0.1:10 for c1=1:0.1:10 for b2=1:0.1:10 for c2=1:0.1:10

CALCULATION FORMULAS (to calculate value)

if value<value1 disp (count); % loop iterations

setappdata(0, 'Flag' , 1);

while(1) fprintf (2, 'looping...\n' ); Flag=getappdata(0,'Flag'); if Flag == 0 break; end drawnow end end end end end end end end end end

For STOP-push_button in GUI I have used your code like this:

% --- Executes on button press in pushbutton. function pushbutton_Callback(hObject, eventdata, handles) % hObject handle to pushbutton9 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) setappdata(0, 'Flag' , 0); % to be mentioned under stop pushbutton callback

I Hope it will work for you...thanks !!

[Dishant Arora]

To break out of nested loops check out for flag every time you enter inside a loop. Alter you main script like this:

setappdata(0 , 'Flag' , 1)
for ii = 1:10
   if getappdata(0 ,'Flag') == 0
      break
   end
   drawnow
   for jj = 1:10
      if getappdata(0 , 'Flag') == 0
         break
      end
      drawnow
      disp(jj)
   end
end

And your stop pushbutton callback looks fine

[Keshav Dev Singh]

Thanks Dishant, Now it is working correctly. Can you help in one more thing, if I want to re-run my same main script for further iterations using same RUN push_button, what would be the script?

Thanks for your time and kindness,

Best Regards, K.D.Singh

[Dishant Arora]

call that script file by name inside your run pushbutton callback.

[Keshav Dev Singh]

Thanks Dishant, I want to make a display button in my matlab GUI who can automatically show the running FOR loop iterations/ counts just like it shows in matlab workspace during programming running. e.g. 1,2,3...........200,....400....1000.....n-iterations

How to make such type of GUI DISPLAY window and what could be the script of this DISPLAY callback function?

Thank you very much in advance!

-- K.D.Singh