"No public property string exists for class matlab.ui.​control.UI​Control."

I'm trying to create a GUI in GUIDE with radio buttons and having never used radio buttons before and struggling to make any sense of the available help I am trying to just make a very basic placeholder script to confirm that the GUI is recognising my radio buttons.

    % --- Executes when selected object is changed in uibuttongroup1.
function uibuttongroup1_SelectionChangedFcn(hObject, eventdata, handles)
% hObject    handle to the selected object in uibuttongroup1 
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
h = guidata(gcbo);
handles.text21.string = 'boop';
guidata(gcbo, h);

text21 is my field on the GUI I am just using to test output from functions, its working fine with other features such as a listbox. When I do this, I get the error message in the heading, which remarkably gets no results at all on Google.

What I actually want to do is something which meaningfully refers to the selected button rather than just a token output when the selection is changed, how do I do that? Just outputting something associated with it to text21 would do to start with, I could work out the rest from there. This seems like the most basic thing you could possibly do with a radio button and yet I can't find that anywhere.

Answer 1

[Matt J]

Have you tried

 set(handles.text21, 'String', 'boop');

[Penny]

That works, thanks!

[mccoy mcpeter]

Thank you. This has helped me in solving a similar problem.

Answer 2

[Steven Lord]

When using the object.propertyname syntax to set or query property names of a Handle Graphics object object, propertyname must be the full name of the property with the correct case. Text objects do not have a property named string, they have a property named String.

t = text(0.5, 0.5, 'Hello');
pause(2)
t.String = 'Goodbye';
pause(2)
t.string = 'Back again!'; % this will error