Exercise

import numpy as np

A = np.random.randn(10,15)
A

B = np.ones((10,15))
B

C  = A + B
C

A > B

import numpy as np

arr = np.random.randn(6,10)
arr

arr[[1,3],:]=arr[[3,1],:]
arr

Write a NumPy program to compute the matrix product of two matrix,[[1,2,3], [4,5,6]] and [[7,8], [9,10], [11,12]].

import numpy as np

arr_a = [[1,2,3], [4,5,6]]
arr_b = [[7,8], [9,10], [11,12]]
arr_a,arr_b

two_multi_res = np.dot(arr_a, arr_b)
two_multi_res

（待修改.）