return in menu matllab, function menu, back in menu of choices

Hello,

I have menu for example

d=menu('main menu','function','methods')

switch d

      case 1
          o=menu('function','linear','nonlinear','back main menu')

      case 2

         u= menu('methods','hierarchical','nonhierarchical','back main menu')

end

When I push the back main menu, I wanna go back to the main menu, I want to close all the windows and cleaned the command line.

As you'll have to define 'back main menu' ?

Thanks for you help.