numpy.random.rand()和numpy.random.randn()的区别

import numpy as np
a =  np.random.rand(4, 1)
b = np.random.randn(4, 1)
print(a)
print("\n")
print(b)

import numpy as np
a =  np.random.rand(4, 1)
b = np.random.randn(4, 1)
print(a)
print("\n")
print(b)
​

​Result:
[[0.98429255]
 [0.25342119]
 [0.26999272]
 [0.24893671]]


[[ 0.07078823]
 [-0.54274356]
 [ 0.29564877]
 [-2.00665922]]