how delete xline in app designer

        function RilevaPeriodoButtonValueChanged(app, event)
            value = app.RilevaPeriodoButton.Value;
       if value
            A=app.Eq.Live.idxBackTestInizio; 
            B=app.Eq.Live.idxBackTestFine;
            TRIL=app.Eq.RP_bin(A:B);
           % disp(find(TRIL))
            xline(app.UIAxes_Eq_2,find(TRIL),'HandleVisibility','off')   
       else
           %%DELETE IT! HOW??
       end   

Answer 1

[Jinal]

Hello Luca,

As per my understanding, you would like to know how to delete a ‘ConstantLine’ created using ‘xline’ function in App Designer.

The ‘delete’ function can be used to delete a graphic object such as a ‘ConstantLine’.

Refer to the following sample code for creating and deleting a constant vertical line by changing the state of a ‘StateButton’ in App Designer:

properties (Access = private)
    x1 = [];
end

% Callbacks that handle component events
methods (Access = private)

    % Value changed function: Button
    function ButtonValueChanged(app, event)
        value = app.Button.Value
        
        if value
            app.x1 = xline(app.UIAxes,0.2,'HandleVisibility','off'); 
        else
            if(isprop(app,'x1'))
                delete(app.x1);
            end
        end   
    end
end

Please refer to the following documentation to know about deleting graphic objects using the ‘delete’ function:

• https://www.mathworks.com/help/matlab/ref/delete.html#bvigxc4-1

I hope this resolves the issue you were facing.

[Luca Re]

hi, I already tried that solution but it doesn't work..

disp(isprop(app,'x1'))

if(isprop(app,'x1'))

delete(app.x1);

end

end

>> 0