Slider is still at min and not moving

Hi, this is part of my super simple slider, but it still not working...Slider is not moving. Thanks for help!!

function slider1_Callback(hObject, eventdata, handles)
  sliderMin = 1;
  sliderMax = 520; % this is variable
  sliderStep = [1, 1] / (sliderMax - sliderMin) % major and minor steps of 1

    set(handles.slider1, 'Min', sliderMin);
    set(handles.slider1, 'Max', sliderMax);
    set(handles.slider1, 'SliderStep', sliderStep);
    set(handles.slider1, 'Value', sliderMin); % set to beginning of sequence

    time=get(handles.slider1,'Value');
    set(handles.text1,'String',num2str(round(time)))
    guidata(hObject, handles);

[Walter Roberson]

It isn't moving from what to what?

Note that you might need to add a drawnow() to give a chance for the GUI to update.

Answer 1

[Image Analyst]

Yeah, because you're setting the value equal to the min every time the user tried to slide it. Remove this line to fix it:

set(handles.slider1, 'Value', sliderMin); % set to beginning of sequence

[Tuyen]

I have the same issue. My min is 1986 and max is 2011. When I remove that line, the slider bar also disappears and warnings pop up...

[Image Analyst]

What are the "step" sizes?