timer/waitfor

hello everybody, I'm french so excuse me for my english. I'm doing a GUI and I want to do a loop while until a checkbox is checked. I choose to use timer/waitfor because I have others things to do if the chekbox is not checked, but it doesn't work :

         while tline==-1
            tline = fgetl(fid)
            t = timer('Period', 10.0);
            w=waitfor(t);
            if w==0
               test=0 ;
               return;%if the chackbox is checked I exit my loop
            end
        end

but I have this mistake :

??? Error using ==> timer.waitfor Too many output arguments.

Error in ==> test>TimeReal at 604 w=waitfor(t);

Error in ==> test>TRE_Callback at 635 TimeReal(handles);

Error in ==> gui_mainfcn at 96 feval(varargin{:});

Error in ==> test at 46 gui_mainfcn(gui_State, varargin{:});

Error in ==> @(hObject,eventdata)test('TRE_Callback',hObject,eventdata,guidata(hObject))

??? Error while evaluating uicontrol Callback

how I have to do??? thank you for your help!!!

Answer 1

[Fangjun Jiang]

First of all, waitfor() doesn't have return argument. That is what the error message tries to tell you.

Second, I don't think you can achieve what you want. type doc waitfor to find out what waitfor() function is about.