例题2.28

例题2.28代码

import numpy as np
a = np.arange(16).reshape(4,4)
b = np.floor(5 * np.random.random((2, 4)))
c = np.ceil(6 * np.random.random((4, 2)))
d = np.vstack([a, b])
e = np.hstack([a, c])
print(a); print(b); print(c); print(d); print(e)