def oplot(self, x, y, **kw):
        """overplot x, y values (on top of old plot), 
        for method options see PlotPanel.oplot
        """
        return self.frame.oplot(x,y,**kw)
def oplot ( self , x , y , ** kw ) : return self . frame . oplot ( x , y , ** kw )
overplot x, y values (on top of old plot), 
        for method options see PlotPanel.oplot