如何用python numpy产生一个正态分布随机数的向量或者矩阵

import numpy as npx = np.random.randn(4, 5) # 生成一个4*5的服从正态分布(0, 1)的数组print(x)结果: array([[ 1.49880806, 0.49802583, -0.73570234, 0.6838595 , -1.07146133], [-0.80834618, 0.28833047, 0.6492072 , -1.23454671, -0.42839883], [ 0.75936243, -0.676