Can I see the values that at the slider ?

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metin eroglu 2019-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/458297-can-i-see-the-values-that-at-the-slider

评论： Adam Danz 2019-4-24

采纳的回答： Adam Danz

Hello,

Can I see or can I get the values that at the slider ?

You can see the slider tabs and I need to see the values at the slider. For instance, the value of the top is 0.75, and I need to see 0,75 at the gui panel. Can you help me?

Thank you

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Answer 1

Adam Danz 2019-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/458297-can-i-see-the-values-that-at-the-slider#answer_372092

在 MATLAB Online 中打开

You can access the slider value from the handle to the slider. I don't know if you're using 'guide' or 'appdesigner' (or neither) but you'll use the same method either way. Here's a demo

fig = uifigure;
h = uislider(fig);
% h is the handel to your slider
sliderValue = h.Value; 

If you want to display that on your GUI you'll need to add a static text box that displays the value.

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metin eroglu 2019-4-24

在 MATLAB Online 中打开

Thank you for answer.

Here is my slider code and 2nd code is static text code but I could not put right code to static text code.

% This is slider code
% --- Executes on slider movement.
function slider5_Callback(hObject, eventdata, handles)
% hObject    handle to slider5 (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
global im_adjust_low
sliderVal = get ( hObject , 'Value' ) ;
% set ( handles.testNum, 'String', num2str (sliderVal)   ) ;
% factor = num2str (sliderVal) ;
im_adjust_low =  (sliderVal) ;
--------------------------------------------
% This is static text code
% --- Executes during object creation, after setting all properties.
function text35_CreateFcn(hObject, eventdata, handles)
% hObject    handle to text35 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called
fig = uifigure;
h = slider5(fig);
% h is the handel to your slider
sliderVal = h.Value; 

metin eroglu 2019-4-24

在 MATLAB Online 中打开

Hello again my friend, I did it success with different way I think. I just add that code.

Here, my value is stored in "sliderVal". and I just write that

set ( handles.text38,'String',sliderVal);

So all code is that :

function slider5_Callback(hObject, eventdata, handles)
% hObject    handle to slider5 (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
global im_adjust_low
sliderVal = get ( hObject , 'Value' ) ;
% set ( handles.testNum, 'String', num2str (sliderVal)   ) ;
% factor = num2str (sliderVal) ;
im_adjust_low =  (sliderVal) ;
%handles.text38.String = sprintf('%.1f', sliderVal);  % round to 1 dp
set ( handles.text38,'String',sliderVal);

Thank you again broadening my horizon : )

Adam Danz 2019-4-24

I see. Newer versions of matlab allow for dot notation to access properties instead of set() and get(). More info: https://www.mathworks.com/help/matlab/creating_plots/access-and-modify-property-values.html

That's one difference in your line of code. The other difference is that I converted the sliding value to a string and rounded to 1 decimal place whereas you're entering the value directly as text. Both methods are OK.

Congrats for solving it!

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Can I see the values that at the slider ?

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