import numpy as np
from matplotlib import pyplot as plt
plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True
y = np.array([1, 3, 2, 5, 2, 3, 1])
curve, = plt.plot(y, c='red', lw=5)
print("从绘图中提取数据....")
xdata = curve.get_xdata()
ydata = curve.get_ydata()
print("绘图的X数据点是：", xdata)
print("绘图的Y数据点是：", ydata)
plt.show()

从绘图中提取数据....
绘图的X数据点是： [0. 1. 2. 3. 4. 5. 6.]
绘图的Y数据点是： [1 3 2 5 2 3 1]