varying image properties Using MATLAB slider

I'm not using slider for viewing image/graph on axes by sliding it. Code shown below is a part of my m-file.

    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)
    fname = getappdata(0, 'fname');
    [a, map] = imread(fname);
    x = ind2rgb(a, map);
    b = get(handles.slider2,'value');
    j = imadjust(x,[],[],b);
        axes(handles.axes1);
        imshow(j);

b in above code is a variable. The moment I slide the slider image brightness changes but at first when I run the code slider's initial point will be in extreme left. But for above code slider should be at the center.

How can i set values( to increase/decrease brightness) to that slider? How can i go for it?

Answer 1

[David Sanchez]

To make sure your slider initialize in any value of your liking, place the set function on the start-up function of your GUI.

set(handles.slider2,'value','your_value_here');