下面的代码创建了一个带有白点的散点图。如何在不重新绘制整个图形的情况下删除这个点?
g = Figure(figsize=(5,4), dpi=60);
b = g.add_subplot(111)
b.plot(x,y,'bo') # creates a blue dot
b.plot(x,y,'wo') # ovverrides the blue dot with a white dot (but the black circle around it remains)