You can insert the required code in the callback of the slider.
How did you create the GUI? By GUIDE or programatically? Do you know how to add a callback function to the slider? It would be easier to answer, if you post, what you have tried so far and ask a specific question.
A bold guess:
function MainGUI
handles.Fig = figure;
handles.Slider = uicontrol('style', 'slider', 'Position', [10, 10, 100, 15], ...
'Callback', @mySliderCB);
handles.Table = uitable('Position', [10, 40, 400, 200], 'Data', rand(4));
guidata(handles.Fig, handles);
end
function mySliderCB(SliderH, EventData)
handles = guidata(SliderH);
SliderUD = get(SliderH, 'UserData');
Value = get(SliderH, 'Value');
if ~isequal(SliderUD, Value) % Value has changed
Data = get(handles.Table, 'Data')
FileName = ??? % According to your needs
save(FileName, 'Data');
set(handles.Table, 'Data', cell(4));
end
