Below is an example of how to do it using two functions and a dialog which is created where you can interrupt - I'm sure you could take this as a skeleton and modify to suit.
EDIT:
function FUNCTION_IN_FILE1
h = dialog ( 'WindowStyle', 'Normal', 'position', [400 400 100 100], 'visible', 'off' );
FILE2_StartGuiForInterruption ( h );
while true
pause ( 0.1 );
disp ( 'in loop doing calculations' );
if ishandle ( h ) == false
break
end
end
disp ( 'finished' );
end
function FILE2_StartGuiForInterruption ( parent )
uicontrol ( 'parent', parent, 'style', 'pushbutton', 'Callback', {@FILE2_STOP}, 'position', [20 20 60 60], 'string', 'stop', 'backgroundcolor', 'red' );
set ( parent, 'visible', 'on' );
end
function FILE2_STOP ( obj, event )
close ( get ( obj, 'parent' ) );
end
