MATLAB: Creating empty ui control component

Question

When using appdesigner, I want to initialize a property as an array of labels and text area

properties (Access = private)
    comp_ui_obj
end
    
function startupFcn(app)
    app.comp_ui_obj(1) = app.CompLabel;
    % 2..n assignments here
end

The problem is that the declaration of comp_ui_obj is by default double. Because of this app.comp_ui_obj(1) will contain a double instead of a matlab.ui.control object.

So, it seems that app.comp_ui_obj needs to be initialized as an empty matlab.ui.control object before the assignment.

With some classes, the empty function can be used for this (ex: uint8.empty). However, matlab.ui.control.empty does not work.

So, how do we initialize an empty ui control in appdesigner? How do we initialize a vector of empty elements?

Answer 1

Try setting your property to an empty Label class using the following

comp_ui_obj = matlab.ui.control.Label.empty