close  Close figure.
    close(H) closes the window with handle H.
    close, by itself, closes the current figure window.
 
    close('name') closes the named window.
 
    close ALL  closes all the open figure windows.
    close ALL HIDDEN  closes hidden windows as well.
    close ALL FORCE  unconditionally closes all windows by deleting them
    without executing the close request function.
 
    STATUS = close(...) returns 1 if the specified windows were closed
    and 0 otherwise.