如何在tkinter中持续刷新FigureCanvasTkAgg

from tkinter import *
from matplotlib.figure import Figure
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg

root = Tk()
root.title("FigureCanvasTkAgg Refresh Example")

fig = Figure(figsize=(6, 4), dpi=100)

ax = fig.add_subplot(111)

def update_data():
    # 更新图形数据的逻辑代码

    ax.clear()
    # 绘制图形的逻辑代码
    ax.plot(x_data, y_data)
    canvas.draw()

canvas = FigureCanvasTkAgg(fig, master=root)
canvas.draw()
canvas.get_tk_widget().pack(side=TOP, fill=BOTH, expand=True)

update_button = Button(root, text="Update", command=update_data)
update_button.pack(side=BOTTOM)

root.mainloop()