如何使用 matplotlib 绘制实时折线图？

Question

我有一个代码可以根据参考使用 matplotlib 绘制实时散点图。如何获取实时折线图？

import time
import matplotlib.pyplot as plt

plt.axis([0, 100, -10, 10])
plt.ion()
plt.show()

ts_start = time.time()

## perpetual loop code
    p_x = int(int(time.time())-int(ts_start))
    p_y = mynum # keeps getting generated in the loop code
    plt.scatter(p_x, p_y)
    plt.plot(p_x, p_y)
    plt.draw()
    time.sleep(0.05)

Answer 1

这是我的做法

import time
import matplotlib.pyplot as plt

plt.axis([0, 100, -10, 10])
plt.ion()
plt.show()
ydata = [0]
line, = plt.plot(ydata)

ts_start = time.time()

## perpetual loop code
    p_x = int(int(time.time())-int(ts_start))
    p_y = mynum # keeps getting generated in the loop code
    ydata.append(p_y)
    line.set_xdata(np.arange(len(ydata)))
    line.set_ydata(ydata)
    plt.draw()
    time.sleep(0.05)