"Not enough input arguments." error on TimerFcn

Hi, i'm new to matlab and i'm trying to make that when click the button in GUI it will put some of 1 (5 to be exact)into random address of(1*16)matrix every sec for 5 sec by using timer here is my code

function start_Callback(hObject, eventdata, handles)
% hObject    handle to start (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
if true;
  handles.level = 5;
  handles.RDM = timer;
  handles.RDM.Period         = 1;
  handles.RDM.ExecutionMode  = 'fixedRate';
  handles.RDM.TimerFcn       = @rdmnew;
  handles.RDM.TasksToExecute = 5;
  handles.Btt = zeros(1,16);
  for loop = 1:handles.level
      x = randi(16,1);
      handles.Btt(x)=1;
  end
  start(handles.RDM)
  guidata(hObject,handles);
end
delete(handles.RDM);

function rdmnew(hObject, eventdata, handles)
  for k=1:handles.level
      x = randi(16,1);
      handles.Btt(x)=1;
  end
  guidata(hObject,handles);

and it got the error

Error while evaluating TimerFcn for timer 'timer-1'

Not enough input arguments.

and i have no idea how to solve it

i would really appreciate any help

Thank you in advance.

Answer 1

[Walter Roberson]

Timers are not passed the "handles" structure unless you specially arrange it.

You could change

handles.RDM.TimerFcn       = @rdmnew;

to

thisfig = ancestor(hObject, 'figure');
handles.RDM.TimerFcn       = @(hObject, eventdata) rdmnew(hObject, eventdata, guidata(thisfig));