How to stop a for loop execution from GUI?(From Toolbar stop button)

I have for loop,,I want to to stop this loop from a toolbar button,, Initially I have set a flag "STOP=0",,,and when I press my stop button in tool bar,,I am calling a function,,where "STOP=1" I have written script,,,,But my script is not considering this"STOP" flag,,,please hep me out>...

Answer 1

[ChristianW]

You can write your flag in the UserData-property of the toolbaricon.

...
set(handles.uitoolbar1,'UserData',0)
for ...
  if get(handles.uitoolbar1,'UserData')
      break
  end
end

...

function uipushtool1_ClickedCallback(hObject, eventdata, handles)
set(handles.uitoolbar1,'UserData',1)

[Arun Badigannavar]

for loop is executing in other function than main figure...

[Arun Badigannavar]

set(handles.uitoolbar1,'UserData',0)
for i=1:1:inf
   if get(handles.uitoolbar1,'UserData')
    break
   end

      a=i

      pause(0.00000000000000000000001)
  end

If I put pause ,,then only its working,,,

[Jan]

The tiny interval for PAUSE is not useful. Use pause to get the shortest possible delay. Usually drawnow is used to allow ui-objects to update.

Answer 2

[Jan]

Each function has its own workspace, such that a variable set in one function is not visible in the other. A solution is to set a flag e.g. in the UserData of a figure or any other UI-object. This flag can be checked from inside the loop also.