Python测试求解代码

Question

Answer 1

6.1 6.2如下：

# 6.1
import numpy as np

a = np.arange(20).reshape(4, 5)
print(a)
print('纵轴求和：', np.sum(a, axis=0))
print('横轴均值，标准差，最大值：', np.mean(a, axis=1), np.std(a, axis=1), np.max(a, axis=1))

# 6.2 matplotlib
import matplotlib.pyplot as plt

x = np.linspace(0, 2 * np.pi, 100)

plt.plot(x, np.sin(x), 'b', label='sin')
plt.plot(x, np.cos(x), 'r', label='cos')
plt.xlabel('x')
plt.ylabel('y')
plt.xticks(np.linspace(0, 2 * np.pi, 5))
plt.yticks(np.linspace(-1, 1, 5))
plt.title('sin/cos')
plt.legend()
plt.show()