矩阵的运算：Python语言实现

import numpy as np
#这里是矩阵的加法
ar1=np.arange(10).reshape(10,1)
ar1
ar2=np.arange(10).reshape(10,1)
print(ar1)
print('\n')
print(ar2)
ar1+ar2

[[0]
 [1]
 [2]
 [3]
 [4]
 [5]
 [6]
 [7]
 [8]
 [9]]


[[0]
 [1]
 [2]
 [3]
 [4]
 [5]
 [6]
 [7]
 [8]
 [9]]
Out[8]:
array([[ 0],
       [ 2],
       [ 4],
       [ 6],
       [ 8],
       [10],
       [12],
       [14],
       [16],
       [18]])

A=np.arange(12).reshape(3,4)
B=np.arange(12).reshape(4,3)
print(A)
print(B)

[[ 0  1  2  3]
 [ 4  5  6  7]
 [ 8  9 10 11]]
[[ 0  1  2]
 [ 3  4  5]
 [ 6  7  8]
 [ 9 10 11]]

c=np.dot(A,B)

array([[ 42,  48,  54],
       [114, 136, 158],
       [186, 224, 262]])

print(np.linalg.inv(c)) 

array([[ 42,  48,  54],
       [114, 136, 158],
       [186, 224, 262]])