matplotlib绘图变量是文本

Question

将上面的数字绘制成图 横坐标是Training times（2000）纵坐标是数字没有单位  要求有两条线train_err  test_err

重点是如何将文本导入matplotlib

Answer 1

import matplotlib.pyplot as plt
import numpy as np
data_1 = np.loadtxt('train_err.txt')
data_2 = np.loadtxt('test_err.txt')
x = np.linspace(0, len(data_1), len(data_1))
plt.plot(x, data_1)
plt.plot(x, data_2)
plt.show()