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val = get(handles.slider1, 'Value');
newval = round(val * 10) / 10; % Wert wird angepasst
set(handles.slider1, 'Value', newval); % Slider wird minimal angepasst

function sliderT_Callback(hObject, eventdata, handles)

% hObject    handle to sliderT (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
sliderValue=get(handles.sliderT,'Value');         ------------------------------------------

y=round(sliderValue);
set(handles.editT,'String',num2str(sliderValue));   ---------------------------------------------------------------------------------
f=get(hObject,'value');
 

sliderValue=get(handles.sliderT,'Value');        
y=round(sliderValue);
set(handles.sliderT,'Value', y);
set(handles.editT,'String',num2str(y));

sliderValue=get(handles.sliderT,'Value');        
y=round(sliderValue/100)*100;
set(handles.sliderT,'Value', y);
set(handles.editT,'String',num2str(y));