Handling Slider in GUI

I want my slider to increase in steps of 1, no fractions allowed, not when it's being dragged. Not even when i click on increase/decrease button.

function slider2_Callback(hObject, eventdata, handles)
% hObject    handle to slider2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
 set(handles.slider2, 'Max',10);
    set(handles.slider2, 'Min', 1);
    set(handles.slider2, 'SliderStep' , [1,1] );
sliderValue = get(handles.slider2,'Value');
 set(handles.edit2,'String',sliderValue)

even though i have it 1,1. it doesn't work according to what i want and i have kept the minimum as 1, so when i click on increase button. it increases '0.01' and i get this error:

Warning: slider control can not have a Value outside of Min/Max range
Control will not be rendered until all of its parameter values are valid 
Warning: slider control can not have a Value outside of Min/Max range
Control will not be rendered until all of its parameter values are valid 
Warning: slider control can not have a Value outside of Min/Max range
Control will not be rendered until all of its parameter values are valid

and the slider disappears. Not sure where i am going wrong

Answer 1

[Walter Roberson]

Setting the min and max and sliderstep should be done at the time the slider is created, such as in slider2_CreateFcn

For the other part of your question see https://www.mathworks.com/matlabcentral/answers/216723-how-can-i-force-a-slider-uicontrol-object-in-guide-to-move-in-discrete-steps

[JA]

I tried to setting it in slider2_CreateFcn. But I am getting this error: Attempt to reference field of non-structure array.

Attempt to reference field of non-structure array.

   Error in gui>slider2_CreateFcn (line 210)
   set(handles.slider2, 'Max',10);

Error in gui_mainfcn (line 96)
        feval(varargin{:});

Error in gui (line 44)
    gui_mainfcn(gui_State, varargin{:});

Error in
@(hObject,eventdata)gui('slider2_CreateFcn',hObject,eventdata,guidata(hObject))

Error using struct2handle
Error while evaluating uicontrol CreateFcn

Will check that link, Thank you!

[Walter Roberson]

 set(hObject, 'Max', 10, 'Min', 1);

[JA]

Still doesn't work.

function slider2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to slider2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: slider controls usually have a light gray background.
if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end
set(hObject, 'Max', 10, 'Min', 1);

This is where i set it.

I get the below error:

Warning: slider control can not have a Value outside of Min/Max range
Control will not be rendered until all of its parameter values are valid 
> In openfig at 135
  In gui_mainfcn>local_openfig at 286
  In gui_mainfcn at 234
  In gui at 44 
Warning: slider control can not have a Value outside of Min/Max range
Control will not be rendered until all of its parameter values are valid 
Warning: slider control can not have a Value outside of Min/Max range
Control will not be rendered until all of its parameter values are valid

[Walter Roberson]

You should give it a Value in slider2_CreateFcn as the default is 0

[JA]

Thanks for your reply. Can you help me with the slider steps. I have set it as

set(hObject, 'SliderStep' , [1/9,1/9] );

In the CreateFcn, but only when i use the increase/decrease button, it works when i drag the slider. it does not work

Answer 2

[Andres Castillo Bermudez]

I Round the number with the 'round function'

coff=round(get(hObject,'value')); %round the number

set(handles.lpfDisplay,'String',num2str(coff)); %display the number on a text box

I use it for a guitar effect on Matlab.