MATLAB: Dot indexing is not supported for variables of this type when trying to write value into static text box

Question

function text7_CreateFcn(hObject, eventdata, handles)
value=1;
set(handles.text7, 'String', num2str(value))

I am trying to add a value that will be determined by a slider in my GUI into the text of a static text box, but recieve the error message 'Dot indexing is not supported for variables of this type'

Answer 1

Do not put anything into the CreateFcn() functions of controls. If you want something to be initialized with a value, then put that value into the String property of the control in GUIDE, not in the CreateFcn.

Now, to get the value of a slider and put it in the text box as you move the slider, you'd put it into the callback function of the slider, not the callback of the text box.

function slider1_CallbackFcn(hObject, eventdata, handles)
value = handles.slider1.Value;
textLabel = sprintf('Slider = %.3f', value);
% Update text box
handles.text7.String = textLabel;