如何在tkinter画布上更新matplotlib子图

Question

我想更新tkinter GUI中嵌入Canvas的子图。无论我做什么，我的意图都会失败。看看我有多远：

from tkinter import *
from matplotlib.backends.backend_tkagg import (FigureCanvasTkAgg, NavigationToolbar2Tk)
import matplotlib.pyplot as plt
import time
root = Tk()
figId = plt.figure()
canvas = FigureCanvasTkAgg(figId, master=root)
canvas.get_tk_widget().pack()
canvas.draw()
vals1 = [5, 6, 3, 9]
vals2 = vals1
for i in range(0, len(vals1)+1):
    toPlot = vals1[0:i]
    plt.subplot(211).plot(toPlot)
    plt.subplot(212).plot(toPlot)
    time.sleep(1)
root.mainloop()

我发现做plt.pause(.1)这样的事情不是正确的方式。对我来说，似乎我必须介绍matplotlib.animation，但我真的不知道该怎么做。

Answer 1

我找到了答案：

import random
from itertools import count
import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
from tkinter import *
from matplotlib.backends.backend_tkagg import (FigureCanvasTkAgg, NavigationToolbar2Tk)
x_vals = []
y_vals1 = []
y_vals2 = []
index = count()
root = Tk()
figId = plt.figure()
canvas = FigureCanvasTkAgg(figId, master=root)
canvas.get_tk_widget().pack()
canvas.draw()
def animate(i):
    x_vals.append(next(index))
    y_vals1.append(random.randint(0, 5))
    y_vals2.append(random.randint(0, 5))
    plt.cla()
    plt.plot(x_vals, y_vals1)
    plt.plot(x_vals, y_vals2)
ani = FuncAnimation(plt.gcf(), animate, interval=1000)
root.mainloop()