Delete previous xline on app.UIAxes

How to delete previous xline on app.UIAxes? Let say if I want to change a new value, the previous lines are still on the app.UIAxes. I have tried

xline(app.UIAxes,rotorbar_LSB,'Color','green','LineStyle','--','LineWidth',1.5,'DisplayName','Broken Rotor Bar LSB');

hold (app.UIAxes,'off')

delete (xline(app.UIAxes,rotorbar_LSB,'Color','green','LineStyle','--','LineWidth',1.5,'DisplayName','Broken Rotor Bar LSB'))

but seems like it does not work. The previous xline is still there.

Answer 1

[Voss]

Store the line when it is created:

app.xline_handle = xline(...);

Later, delete the line:

delete(app.xline_handle);
app.xline_handle = [];

[Fatin Najihah Husaini]

I have tried but the app.UIAxes appears blank. I have defined the xline_handle as property.

[Voss]

Can you share the complete code?

[Fatin Najihah Husaini]

% plot sideband frequencies for broken rotor bar

app.xline_brbLSB=xline(app.UIAxes,rotorbar_LSB,'Color','green','LineStyle','--','LineWidth',1.5,'DisplayName','Broken Rotor Bar LSB');

delete (app.xline_brbLSB);

app.xline_brbLSB=[];