Numpy 课后习题

Numpy

Generate matrices A, with random Gaussian entries, B, a Toeplitz matrix, where A 2 Rn×m and B 2 Rm×m,
for n = 200, m = 500. 

import numpy as np
from scipy.linalg import toeplitz

#建立矩阵A、B
n=200
m=500
A = np.random.randn(n,m)
B = toeplitz(range(m))
print(A)
print(B)

Exercise 9.1: Matrix operations

Calculate A + A, AAT， ATA and AB. Write a function that compu